2026-04-11T10:38:37.000Zhttps://openaccess.firat.edu.tr/oai/request

oai:openaccess.firat.edu.tr:11508/79842015-06-06T18:13:39Zcom_11508_875com_11508_871com_11508_708com_11508_1col_11508_877

Deneme Bildirisi Kılıç, İrfan 314 Fırat Üniversitesi Kütüphanesi::GENEL KONULAR Fırat Üniversitesi Kütüphanesi::BİLİM deneme deneme paper 2015-06-06T18:13:39Z 2015-06-06T18:13:39Z 2013-03-05 Bildiri - Yayımlanmış Kılıç, İ̇. (2013). Deneme Bildirisi. dememe sempozyumu. (ss.34-37). elazığ: fırat. http://hdl.handle.net/11508/7984 34;37 dememe sempozyumu Türkçe elazığ fırat

oai:openaccess.firat.edu.tr:11508/79902017-11-30T22:43:17Zcom_11508_11709col_11508_11735

Kablosuz duyarga ağ tabanlı arıza teşhis yaklaşımları Yaman, Orhan Aydın, İlhan Karaköse, Mehmet Akın, Erhan Yaman, Orhan Fırat Üniversitesi Kütüphanesi::BİLİM Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Kablosuz duyarga ağları Asenkron motorlar Arıza teşhisi Temel bileşen analizi Bulanık mantık Kritik bileşenler için bir izleme sisteminin geliştirilmesi erken başlangıç aşamasında farklı arızaları tespit etmek için oldukça önemlidir. Asenkron motorlar birçok endüstriyel sistemin iş gücüdür. Bu motorlarda oluşan arızalar maliyet, güvenlik ve üretimin kesilmesi gibi etkilere sahiptir. Bu çalışmada mil yatağı ve stator arızaları için kablosuz duyarga ağ tabanlı bir arıza teşhis sistemi önerilmektedir. Arıza ile ilgili özellikler motor akım sinyalinden elde edilmekte ve arızalar çıkarılan özelliklerin akıllı teknikler ile tespit edilmektedir. Oluşturulan deney ortamında çoklu motorların durumları kablosuz düğümlerden elde edilen sinyaller ile izlenmektedir. Önerilen yaklaşımın veri toplama, sinyal işleme ve karar verme gibi bütün adımları deneysel olarak gerçekleştirilmiş ve doğrulanmıştır. The development of a monitoring system for critical components is rather important to accurately detect different defects in incipient stage. Induction motors are the workhorses of many industrial systems. Fault occurred in this motor has severe effects such as cost, safety, and production disruption. In this study, a wireless sensor network-based fault diagnosis system is proposed for bearing and stator faults occurred in induction motors. The fault related features are extracted from current signal of the motor and the faults are detected by using the obtained features with intelligent computing techniques. In the established laboratory environment, conditions of multiple motors are monitored by obtaining signals from wireless sensor nodes. All steps of the proposed approach such as data acquisition, signal processing, and decision making have been experimentally carried out and verified. 2015-06-10T08:51:01Z 2015-06-10T08:51:01Z 2013-04-26 Bildiri - Yayımlanmış Yaman, O., Aydın, İ., Karaköse, M. ve Akın, E. (2013). Kablosuz duyarga ağ tabanlı arıza teşhis yaklaşımları. Yaman, O. (Haz.). 21. Sinyal işleme ve İletişim Uygulamaları Kurultayı (SIU 2013). (ss.1-4). Girne/Kıbrıs: IEEE. http://hdl.handle.net/11508/7990 1;4 21. Sinyal işleme ve İletişim Uygulamaları Kurultayı (SIU 2013) Türkçe Girne/Kıbrıs IEEE

oai:openaccess.firat.edu.tr:11508/79942017-11-30T16:24:23Zcom_11508_11907col_11508_11914

Natural convection in porous triangular enclosure with a centered conducting body Varol, Yasin TR25510 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Gözenekli Ortam Üçgen Kapalı Ortam Doğal Taşınım Poroz üçgen kapalı bir ortamda akış ve ısı tranferi analizi nümerik olarak incelenmiştir. Üçgen kapalı ortamın merkezine cisim yerleştirilmiştir. Yerleştirilen cismin yükseklik ve en oranlarına göre akış ve ısı transferi değerleri hesaplanmıştır. A numerical work was performed to examine the heat transfer and fluid flow due to natural convection in a porous triangular enclosure with a centered conducting body. The center of the body was located onto the gravity center of the right-angle triangular cavity. The Darcy law model was used to write the governing equations and they were solved using a finite difference method. Results are presented by streamlines, isotherms, mean and local Nusselt numbers for the different parameters such as the Rayleigh number, thermal conductivity ratio, and height and width of the body. It was observed that both height and width of the body and thermal conductivity ratio play an important role on heat and fluid flow inside the cavity. 2015-06-10T14:12:30Z 2015-06-10T14:12:30Z 2011 Makale - Bilimsel Dergi Makalesi - Tek Yazarlı Varol, Y. (2011). Natural convection in porous triangular enclosure with a centered conducting body. International Communications in Heat and Mass Transfer, 38(3), 368-376. http://hdl.handle.net/11508/7994 38 3 368;376 10.1016/j.icheatmasstransfer.2010.12.013 İngilizce International Communications in Heat and Mass Transfer

oai:openaccess.firat.edu.tr:11508/79932017-11-30T22:43:21Zcom_11508_11709col_11508_11735

Pantograf-katener sistemlerde oluşan sıcaklık değişimi ve arkın termal görüntü ile tespit edilmesi Yaman, Orhan Aydın, İlhan Karaköse, Mehmet Akın, Erhan Yaman, Orhan Fırat Üniversitesi Kütüphanesi::BİLİM Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Pantograf-Katener Sistemler Görüntü İşleme Termal Görüntü Ark Tespiti Pantograf katener sistemleri günümüzde demir yolu ulaşımında büyük öneme sahiptir. Bu sistemlerde oluşabilecek arızalar maliyet, güvenlik ve ulaşımın durması gibi etkilere neden olur. Bu çalışmada pantograf katener sistemlerinde temas noktasının aşırı ısınmasını veya ark oluşmasını tespit etmek için histogram tabanlı termal görüntü işleme yöntemi önerilmektedir. Pantograf katener sistemin termal görüntüleri alınarak, elde edilen görüntüler üzerinde görüntü işleme yöntemleriyle temas noktası tespit edilir. Tespit edilen temas noktasına göre bir kesit alanı oluşturulur. Kesit alanının histogramı çıkarılarak aşırı ısınma ve ark oluşumları gözlemlenmektedir. Bu işlemlerin gerçekleştirilmesiyle erken arıza tespiti yapılarak daha büyük arızaların oluşması engellenmektedir. Önerilen yaklaşımda, temas noktasının tespit edilmesi, kesit alanlarının oluşturulması ve histogramlarının elde edilmesi gibi bütün adımlar deneysel olarak gerçekleştirilmiş ve doğrulanmıştır. Pantograf katener sistemleri günümüzde demir yolu ulaşımında büyük öneme sahiptir. Bu sistemlerde oluşabilecek arızalar maliyet, güvenlik ve ulaşımın durması gibi etkilere neden olur. Bu çalışmada pantograf katener sistemlerinde temas noktasının aşırı ısınmasını veya ark oluşmasını tespit etmek için histogram tabanlı termal görüntü işleme yöntemi önerilmektedir. Pantograf katener sistemin termal görüntüleri alınarak, elde edilen görüntüler üzerinde görüntü işleme yöntemleriyle temas noktası tespit edilir. Tespit edilen temas noktasına göre bir kesit alanı oluşturulur. Kesit alanının histogramı çıkarılarak aşırı ısınma ve ark oluşumları gözlemlenmektedir. Bu işlemlerin gerçekleştirilmesiyle erken arıza tespiti yapılarak daha büyük arızaların oluşması engellenmektedir. Önerilen yaklaşımda, temas noktasının tespit edilmesi, kesit alanlarının oluşturulması ve histogramlarının elde edilmesi gibi bütün adımlar deneysel olarak gerçekleştirilmiş ve doğrulanmıştır. 2015-06-10T13:43:45Z 2015-06-10T13:43:45Z 2013-09-26 Bildiri - Yayımlanmış Yaman, O., Aydın, İ., Karaköse, M. ve Akın, E. (2013). Pantograf-katener sistemlerde oluşan sıcaklık değişimi ve arkın termal görüntü ile tespit edilmesi. Yaman, O. (Haz.). Otomatik Kontrol Ulusal Toplantısı (TOK 2013). (ss.1071-1075). Malatya, Türkiye: TOK 2013. http://hdl.handle.net/11508/7993 1071;1075 Otomatik Kontrol Ulusal Toplantısı (TOK 2013) Türkçe Malatya, Türkiye TOK 2013

oai:openaccess.firat.edu.tr:11508/79952017-11-30T22:43:18Zcom_11508_11709col_11508_11735

Contact point analysis of catenary-pantograph system by using normal and thermal images Yaman, Orhan Aydın, İlhan Karaköse, Mehmet Akın, Erhan Yaman, Orhan Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Raylı sistemler Pantograf Hough dönüşümü Kenar çıkarımı Arıza tespiti Demiryolları, günümüzde diğer ulaşım türlerine göre daha çevreci, güvenli, konforlu ve daha az enerji kullanımı bakımından üstünlük göstermektedir. Demiryolu ulaşımında son zamanlarda elektrikli raylı sistemler geliştirilmiştir. Bu sistemler diğer demiryolu araçlarına göre daha hızlı olup, daha az enerji tüketir. Elektrikli raylı sistemlerde, elektriğin trene iletilmesi için geliştirilen pantograf katener sistemi oldukça önemlidir. Pantograf temas teli üzerinde hareket eder ve katenerden trene gücü iletir. Bu temas işleminin sürekliliğinin sağlanması son derece önemlidir. Mevsim şartlarından dolayı sıcak havalarda katener tellerinin genleşmesi ve soğuk havalarda büzüşmesi temas işleminin sürekliliğini yüksek oranda etkilemektedir. Ayrıca temas işleminin sürekliliği sağlanmadığı sürece pantograf katener sistemlerinde birçok arıza meydana gelmektedir. Bu arızaların zamanında tespit edilmesi demiryolu sisteminin bozulmadan onarılmasını ve düşük maliyetli olmasını sağlamaktadır. Ayrıca erken teşhis yapılarak demiryolu ulaşımlarının aksamaması sağlanmaktadır. Bu çalışmada pantograf katener sistemler için normal ve termal görüntü kullanılarak temas noktasının analizi için bir yöntem sunulmaktadır. Önerilen yöntemde normal ve termal görüntüden katener ve pantograf arasındaki temas noktası kenar çıkarım ve Hough dönüşümü ile bulunmakta, termal görüntüden ise temas noktasının sıcaklığı analiz edilmektedir. Temas noktasındaki aşırı ısınmalar analiz edilerek ark oluşumları tespit edilmektedir. Önerilen yöntemin doğruluğu TCDD Malatya Müdürlüğünde gerçek bir pantograftan alınan deneysel görüntüler ile ispat edilmiştir. Railways are more environmentally friendly, safe, and comfortable than other transport types and they are superior in terms of energy use. In railway transport, electric rail systems have been developed recently. These systems are faster than other railway vehicles, and consume less energy. In electric rail systems, developed pantograph-catenary system for the transmission of electricity from the train is very important. Pantograph slides on the contact wire and transmit the power from catenary to the train. This contact is extremely important to ensure continuity of operation. Contact process is affected from expansion of contact wire because of cold weather and shrinkage in hot weather condition. As long as the continuity process has not been ensured in pantograph-catenary system, many fault will occur. Detection of these faults at an early stage ensures the maintenance of railway systems before catastrophic faults have not occurred. Disruptions of railway system can be prevented by detecting faults at the inception stage. In this study, a new method has been proposed to analyze the contact point between pantograph and catenary system by using normal and thermal images. In the proposed method, contact point between catenary and pantograph are found from normal and thermal images by applying edge detection and Hough transform. The temperature analysis of the obtained contact point is done in the thermal image. Arcs are determined by analyzing overheat in contact points. The accuracy of the proposed method is proved by analyzing a real pantograph images taken from directorate of Malatya TCDD. 2015-06-11T05:57:39Z 2015-06-11T05:57:39Z 2013-10-09 Bildiri - Yayımlanmış Yaman, O., Aydın, İ., Karaköse, M. ve Akın, E. (2013). Contact point analysis of catenary-pantograph system by using normal and thermal images. Yaman, O. (Haz.). 2. Uluslar arası Raylı Sistemler Mühendisliği Sempozyumu. (ss.1-8). Karabük, Türkiye: ISERSE. http://hdl.handle.net/11508/7995 1;8 2. Uluslar arası Raylı Sistemler Mühendisliği Sempozyumu Türkçe Karabük, Türkiye ISERSE

oai:openaccess.firat.edu.tr:11508/80012017-11-30T16:24:33Zcom_11508_11907col_11508_11926

Yumurta tavukçuluğunda kullanılan yetiştirme sistemleri Baykalır, Yasin Şimşek, Ülkü Gülcihan Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Yumurta tavuğu Kafesli sistemler Kafessiz sistemler Diğer sistemler Avrupa Birliği (AB)’nin 1999/74/EC konsey kararıyla 1 Ocak 2012’den itibaren konvensiyonel kafes sistemlerinin AB’ye üye ülkelerde yasaklanmasıyla yumurta tavukçuluğunda alternatif sistemlerin kullanılması gündeme gelmiştir. Türkiye’nin AB’ye üye olma sürecinde olduğu göz önüne alınarak yumurta tavukçuluğunda kullanılan yetiştirme sistemlerinin yapılarının, avantaj ve dezavantajlarının bilinmesi mevcut işletmelerin sürdürülebilirliği ve sektöre yeni adım atacak yetiştiricilerin değişikliklere hazırlıklı olmaları açısından önemlidir. Bu konuda Türkiye’de yapılacak araştırmaların yumurta tavukçuluğu sektörüne katkıları olacağı düşünülmektedir. Since conventional cage systems banned in European Union (EU) member states in January 1, 2012 with council directive 1997/74/EC, a need of using alternative systems for egg production has increased. Considering accession process of Turkey to EU, knowing structure, advantage and disadvantages of the breeding systems of egg poultry are important for the sustainability of the existing enterprises and preparedness for the changes of new enterprises. Researches which will be conducted in Turkey on this subject are expected to have contribution to the egg production sector. 2015-06-11T11:23:28Z 2015-06-11T11:23:28Z 2014-04-18 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Baykalır, Y. ve Şimşek, Ü. (2014). Yumurta tavukçuluğunda kullanılan yetiştirme sistemleri. Fırat Üniversitesi Sağlık Bilimleri Veteriner Dergisi, 28(2), 93-98. http://hdl.handle.net/11508/8001 28 2 93;98 Türkçe Fırat Üniversitesi Sağlık Bilimleri Veteriner Dergisi

oai:openaccess.firat.edu.tr:11508/79962017-11-30T22:43:19Zcom_11508_11709col_11508_11735

Particle swarm based arc detection on time series in pantograph-catenary system Aydın, İlhan Yaman, Orhan Karaköse, Mehmet Çelebi, Selahattin Barış Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ pantograph-catenary system image segmentation time series phase space arc detection particle swarm optimization Pantograph-catenary system is the most important component for transmitting the electric energy to the train. If the faults have not detected in an early stage, energy can disrupt the energy and this leads to more serious faults. The arcs occurred in the contact point is the first step of a fault. When they are detected in an early stage, catastrophic faults and accidents can be avoided. In this study, a new approach has been proposed to detect arcs in pantograph-catenary system. The proposed method applies a threshold value to each video frame and the rate of sudden glares are converted to time series. The phase space of the obtained time series is constructed and the arc event is found by using particle swarm optimization. The proposed method is analyzed by using real pantograph-videos and good result have been obtained. Pantograph-catenary system is the most important component for transmitting the electric energy to the train. If the faults have not detected in an early stage, energy can disrupt the energy and this leads to more serious faults. The arcs occurred in the contact point is the first step of a fault. When they are detected in an early stage, catastrophic faults and accidents can be avoided. In this study, a new approach has been proposed to detect arcs in pantograph-catenary system. The proposed method applies a threshold value to each video frame and the rate of sudden glares are converted to time series. The phase space of the obtained time series is constructed and the arc event is found by using particle swarm optimization. The proposed method is analyzed by using real pantograph-videos and good result have been obtained. 2015-06-11T08:01:13Z 2015-06-11T08:01:13Z 2014-06-23 Bildiri - Yayımlanmış Aydın, İ., Yaman, O., Karaköse, M. ve Çelebi, S. B. (2014). Particle swarm based arc detection on time series in pantograph-catenary system. IEEE International Symposium on INnovations in Intelligent SysTems and Applications (INISTA 2014). (ss.344-349). Alberobello, Italy: IEEE. http://hdl.handle.net/11508/7996 344;349 IEEE International Symposium on INnovations in Intelligent SysTems and Applications (INISTA 2014) Türkçe Alberobello, Italy IEEE

oai:openaccess.firat.edu.tr:11508/80022017-11-30T16:24:33Zcom_11508_11907col_11508_11926

Effect of dietary orange peel essential oil on physiological, biochemical and metabolic responses of Japanese quails as affected by early age thermal conditioning and fasting Dalkılıç, Bestami Şimşek, Ülkü Gülcihan Çiftçi, Mehmet Baykalır, Yasin Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Japanese quails Orange peel essential oil Thermotolerance Growth performance Biochemical parameters Yüksek ortam sıcaklığı için en önemli sorunlardan biri olan dünyanın birçok bölgesinde kanatlı üretimi. Isı iklimlendirme nedeniyle ekonomik kayıplar için birçok kanatlı türlerinde yaşanmaktadır Isı stresi. Bu nedenle, portakal kabuğu esansiyel yağı etkisi (OEO) diyet oruç kısa vadeli telafi edici büyüme parametreleri üzerindeki takviyesi ve erken yaşta termal şartlandırılmış bıldırcın civciv çalışılmıştır. 168 sevenday- Eski bıldırcın civciv rastgele, kontrol olarak altı gruba ayrıldı sıcaklık ayarlama (36 ° ± 1 ° C ve 24 saat süreyle% 70-80 bağıl nem) ve açlık grubu (24 saat boyunca yem çekilmesi). Her bir grup ikiye bölünmüş ve alınan bir bazal yem veya 300 ppm OEO ile aynı bazal yem yem desteklenmiştir. Erken yaşta Termal klima ve oruç anlamlı büyüme sonuçlandı Deneyin 7-14 d arasındaki geriliği. Uçucu yağ tamamlayabilir olumlu etkilemiştir kilo ve bıldırcınların yem dönüşüm oranı en Benzer yem alımı ile 7-42, d. Temel ile erken yaşta termal meydan Yağ takviyesi ise meme yüzdesi arttı uyluk ve bel-boyun yüzdesi azalmıştır. Erken yaşta Termal klima daha boyunca ısı stresi ile başa çıkmak için daha iyi kapasite gösterdi Termal olmayan bıldırcın karşılaştırıldığında serum T3 düzeylerinde azalma klimalı. Bu sonuçlar, termal klima için erken maruz kalma önermek olabilir değiştirerek sonradan ısı yükü ile başa çıkmak için bıldırcın yeteneğini teşvik termoregülatuar fizyolojik yanıtlar. OEO takviyesi termotoleransı ediniminde iyi gelişmeler gösterdi. Içinde Sonuç, OEO takviyesi doğal büyüme hızlandırıcı olarak kullanılabilir Ya erken yaşta tedavi veya normal üreme civcivler. High ambient temperature is one of the most important problems for poultry production in many regions of the world. Heat acclimatization has been experienced in many poultry species for economic losses due to heat stress. Therefore, the effect of orange peel essential oil (OEO) dietary supplementation on compensatory growth parameters of short-term fasted and thermal conditioned quail chicks at an early age was studied. 168 sevenday- old quail chicks were randomly assigned to six groups as the control, thermal conditioning (36°±1°C and 70-80 % RH for 24 h) and fasting group (feed withdrawal for 24 h). Each group was split into two and received a basal feed or the same basal feed with 300 ppm OEO supplemented feed. Thermal conditioning and fasting at early age significantly resulted in growth retardation between 7-14 d of the experiment. Essential oil supplementing positively influenced weight gain and feed conversion ratio of the quails at 7-42 d with similar feed intake. Early age thermal challenge with essential oil supplementation increased the breast percentage whereas thigh and waist-neck percentage was decreased. Thermal conditioning at early age demonstrated better capacity to cope with heat stress through greater reduction in serum T3 levels compared to quails that were not thermal conditioned. These results suggest that early exposure to thermal conditioning may promote quails’ ability to cope with the subsequent heat load by altering thermoregulatory physiological responses. OEO supplementation demonstrated the best improvements in thermotolerance acquisition. In conclusion, OEO supplementation can be used as a natural growth promoter either early age treated or normal breeding chicks. 2015-06-11T11:23:30Z 2015-06-11T11:23:30Z 2015 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Dalkılıç, B., Şimşek, Ü., Çiftçi, M. ve Baykalır, Y. (2015). Effect of dietary orange peel essential oil on physiological, biochemical and metabolic responses of Japanese quails as affected by early age thermal conditioning and fasting. Revue de Médecine Vétérinaire, 166(5-6), 154-162. http://hdl.handle.net/11508/8002 166 5-6 154;162 İngilizce Revue de Médecine Vétérinaire

oai:openaccess.firat.edu.tr:11508/79912017-11-30T22:43:16Zcom_11508_11709col_11508_11735

Pantograf katener sistemlerde görüntü işleme ve model tabanlı ark tespiti Yaman, Orhan Karaköse, Mehmet Aydın, İlhan Akın, Erhan Yaman, Orhan Fırat Üniversitesi Kütüphanesi::BİLİM Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ pantograf katener sistemler görüntü işleme Mayr ark model S dönüşümü ark tespiti Pantograf katener sistemi, elektrikli trenin ihtiyaç duyduğu elektrik enerjisini trafo merkezinden trene iletilmesini sağlamaktadır. Bu işlemin kesintisiz bir şekilde gerçekleştirilmesi için pantograf katener sistemler oldukça önemlidir. Bu çalışmada, pantograf katener sistemi için görüntü işleme ve model tabanlı yeni bir ark tespit yöntemi önerilmektedir. Görüntü işleme yöntemleri kullanılarak videodan alınan bir görüntü çerçevesinde oluşan arklar tespit edilmektedir. Bir dizi görüntüden elde edilen veriler ark modellemesinde kullanılmıştır. Bu modelleme sonucunda pantograf katener sistemin, normal ve ark oluşmuş durumlarına ait akım ve gerilim sinyalleri elde edilmektedir. Elde edilen akım gerilim sinyallerinde normal ve ark oluşmuş durumlar incelenmiştir. Akım, gerilim sinyalleri kullanılarak S dönüşümü yapılmıştır. S dönüşümü ile sinyallerin frekans zaman analizi yapılmaktadır. A pantograph-catenary system transmits the electric energy that an electrified train needs from electric power substation to train. Pantograph catenary system is extremely important in order to carry out continuous of the transmission. In this study, a model and image processing based arc detection system is proposed. Arcs occurred in a video frame are detected by using image processing techniques. Data obtained from a sequence of frames are used to model the arc. Arcs occurred in image sequences are modelled during modeling stage. As consequence of the modeling, current and voltage signals, which belong to healthy and arc occurred conditions, are obtained. These signals are analyzed to detect the condition of the pantograph-catenary system as healthy or faulty. Stransform is applied to these signals and occurred arcs are detected.A pantograph-catenary system transmits the electric energy that an electrified train needs from electric power substation to train. Pantograph catenary system is extremely important in order to carry out continuous of the transmission. In this study, a model and image processing based arc detection system is proposed. Arcs occurred in a video frame are detected by using image processing techniques. Data obtained from a sequence of frames are used to model the arc. Arcs occurred in image sequences are modelled during modeling stage. As consequence of the modeling, current and voltage signals, which belong to healthy and arc occurred conditions, are obtained. These signals are analyzed to detect the condition of the pantograph-catenary system as healthy or faulty. Stransform is applied to these signals and occurred arcs are detected. 2015-06-10T13:17:12Z 2015-06-10T13:17:12Z 2014-04-23 Bildiri - Yayımlanmış Yaman, O., Karaköse, M., Aydın, İ. ve Akın, E. (2014). Pantograf katener sistemlerde görüntü işleme ve model tabanlı ark tespiti. Yaman, O. (Haz.). 22. Sinyal işleme ve İletişim Uygulamaları Kurultayı (SIU 2014). (ss.1934-1937). Trabzon, Türkiye: IEEE. http://hdl.handle.net/11508/7991 1934;1937 22. Sinyal işleme ve İletişim Uygulamaları Kurultayı (SIU 2014) Türkçe Trabzon, Türkiye IEEE

oai:openaccess.firat.edu.tr:11508/79922017-11-30T22:43:15Zcom_11508_11709col_11508_11735

Görüntü işleme ve bulanık mantık tabanlı pantograf geometrik modelin tespiti Yaman, Orhan Karaköse, Mehmet Aydın, İlhan Akın, Erhan Yaman, Orhan Fırat Üniversitesi Kütüphanesi::BİLİM Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ pantograf katener sistemler görüntü işleme Bulanık mantık modelleme Bu çalışmada elektrikli trenlerde kullanılan pantograf türünün belirlenmesi için model tabanlı bir yaklaşım önerilmektedir. Elektrikli trenlerin kullanım şartlarına göre pantograf katener sistemin yapısı değişmektedir. Pantograf katener sistemlerinden alınan görüntüler kullanılarak pantograf sisteminin geometrik modeli oluşturulmaktadır. Oluşturulan modelin hangi tür pantografa ait olduğu tespit edilmektedir. İlk olarak kenar çıkarımı ve Hough dönüşümü ile pantografta bulunan bütün doğrular tespit edilmektedir. Tespit edilen doğrulardan alınan bazı bilgiler bulanık mantık işleminde kullanılarak pantografın türü belirlenmektedir. Pantograf türünün belirlenmesi pantografın yüksekliğini tahmin etmek ve katener ile pantograf arasındaki temas noktasını analiz etmek için uygundur. Böylece ark oluşumu ve aşırı temas kuvveti gibi temas noktası problemleri tespit edilebilecektir. In this study, a model based approach is proposed for the recognition of the pantograph type used in electric trains. The shape of the pantograph-catenary changes according to usage conditions of electric trains. A geometric model of the pantograph is constructed by using images taken from the pantograph-catenary system. The pantograph type is determined by using the constructed model. First, all straight lines are extracted from the image by applying the edge detection and Hough transform to the image. Some knowledge obtained from straight lines are given to fuzzy logic and type of pantograph is determined. The determination of pantograph type is useful to estimate the pantograph height and to analyze of contact point between pantograph and catenary. Therefore, contact point problems such as arcing and excessive contact force can be detected. 2015-06-10T13:25:09Z 2015-06-10T13:25:09Z 2014-04-23 Bildiri - Yayımlanmış Yaman, O., Karaköse, M., Aydın, İ. ve Akın, E. (2014). Görüntü işleme ve bulanık mantık tabanlı pantograf geometrik modelin tespiti. Yaman, O. (Haz.). 22. Sinyal işleme ve İletişim Uygulamaları Kurultayı (SIU 2014). (ss.686-689). Trabzon, Türkiye: IEEE. http://hdl.handle.net/11508/7992 686;689 22. Sinyal işleme ve İletişim Uygulamaları Kurultayı (SIU 2014) Türkçe Trabzon, Türkiye IEEE

oai:openaccess.firat.edu.tr:11508/79982015-06-11T08:30:02Zcom_11508_4414com_11508_4391com_11508_4390col_11508_4416

Pantograf katener sistemlerde görüntü işleme ve model tabanlı ark tespiti Image processing and model based arc detection in pantograph catenary systems Yaman, Orhan Karaköse, Mehmet Aydın, İlhan Akın, Erhan 2015-06-11T08:18:34Z 2015-06-11T08:18:34Z Atıf http://hdl.handle.net/11508/7998

oai:openaccess.firat.edu.tr:11508/79992015-06-11T08:30:57Zcom_11508_4395com_11508_4391com_11508_4390col_11508_4397

Kurumsal Ağlar İçin Beş Katmanlı Güvenlik Politikası Ertam, Fatih Tuncer, Türker Avcı, Engin Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ network security; data security; firewall; IDS/IPS Bu çalışmada büyük ağ yapılarına sahip kurumsal yapılarda siber güvenlik tehlikelerine karşı alınacak önlemlerin nasıl olması gerektiğinden bahsedilmektedir. Kurumsal yapı içerisinde kullanıcı cihazları, kenar anahtarlama cihazları, omurga anahtarlama cihazları, kurumsal güvenlik duvarı ve saldırı tespit ve engelleme sistemi olmak üzere beş ana yapıda alınacak olan güvenlik önlemlerinin ağın işleyişine yapacağı katkı ortaya koyulmaktadır. Katmanlı bir yapıda alınan güvenlik önemleri ile güvenlik zafiyetinin oluştuğu katmanda bu problemin ortadan kaldırılarak üst katmana problem taşınmadan durdurulabilmesinin önemi üzerinde durulmaktadır. Kurumsal bir ağda güvenlik politikalarının nasıl olması gerektiğine dair fikir oluşması amaçlanmıştır. In this study actions to be taken against cyber security threats for large corporate structures has big network structure is mentioned. User devices within the corporate structure, side switching devices, backbone switching devices, enterprise firewalls and intrusion detection and prevention systems including security measures, which will be five main structure will contribute to the functioning of the network are highlighted. Just received a similar structure to the onion rings importance of eliminating security weaknesses in the ring can stop problem from moving to the top layer is focused. 2015-06-11T08:18:35Z 2015-06-11T08:18:35Z 2015-05-11 Bildiri - Yayımlanmış Ertam, F. (2015). Kurumsal Ağlar İçin Beş Katmanlı Güvenlik Politikası. The 3rd International Symposium on Digital Forensics and Security. (ss.30-36). Ankara: ISDFS 2015 Proceedings. http://hdl.handle.net/11508/7999 30;36 The 3rd International Symposium on Digital Forensics and Security Türkçe Ankara ISDFS 2015 Proceedings

oai:openaccess.firat.edu.tr:11508/79972017-11-30T16:24:32Zcom_11508_11709col_11508_11716

Abrasive Wear Characteristics of the Coating Area of A Low Carbon Steel Surface Alloyed Through A Tungsten Inert Gas Welding Process”. Surface Engineering Korkut, Mehmet H. Gök, M.s. Korkut M H. TR30926 TR30926 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Abrasive Wear Coating Steel Surface Alloyed Tungsten Inert Gas Welding Surface Engineering Bu bilimsel makalede, Düşük karbonlu çeliğin yüzeyi TIG metodu kullanılarak farklı alaşımlarla kaplanmış ve abrasiv aşınmaya karşı olan etkileri ve mikroyapı özellikleri incelenmiştir. Yine çalışmada birçok kaynak parametresi kullanılmıştır. Kaplanan bölgenin yüzeyi ve yüzey altı mikroyapı değişiklikleri detaylı incelenmiştir. Ayrıca bu çalışma da elde edilen bulgular SEM, EDS ve X-Ray çalışmaları gibi ileri araştırma teknikleri kullanılarak sonuçlar desteklenmiştir Low carbon steel surfaces were alloyed with composite powders using the tungsten inert gas welding method. After the alloying process, the effects of welding parameters, such as energy input, progress speed and coating thickness on the microstructural characteristics of the alloyed samples were examined. In the experimental investigation, a low carbon steel surface was alloyed with austenitic stainless steel powder and austenitic stainless steel composites mixed with 4?5% Co, Mo and Ti particles respectively. Following surface alloying, conventional characterisation techniques, such as optical microscopy, scanning electron microscopy, energy dispersive spectrograph and X-ray diffraction, were used to study the microstructure of the alloyed zone. Hardness measurements were also performed across the alloyed zone. Examination of the microstructure revealed the presence of M23C6 carbides, solid melt phases, and intermetallic phases, such as Ni3Ti, depending on the alloying element in the composite. As the amount of the reinforcing material increased, the saturation rates for the samples decreased, while their hardness increased. The abrasive wear tests conducted revealed that temperature input plays a significant role on the microstructure characteristics, which positively affected the abrasive wear values of the samples. Consequently, the tungsten inert gas welding method was successfully used for the surface alloying of low carbon steels. 2015-06-11T08:18:32Z 2015-06-11T08:18:32Z 2009 Bildiri - Yayımlanmış Makale - Yayımlanmamış Makale Korkut, M. ve Gök, M. (2009). Abrasive Wear Characteristics of the Coating Area of A Low Carbon Steel Surface Alloyed Through A Tungsten Inert Gas Welding Process”. Surface Engineering. Korkut M H. ., (Haz.). Abrasive Wear Characteristics of the Coating Area of A Low Carbon Steel Surface Alloyed Through A Tungsten Inert Gas Welding Process”. Surface Engineering. (ss.515-527). İngiltere: Maney Publishing. http://hdl.handle.net/11508/7997 515;527 Abrasive Wear Characteristics of the Coating Area of A Low Carbon Steel Surface Alloyed Through A Tungsten Inert Gas Welding Process”. Surface Engineering Türkçe İngiltere Maney Publishing

oai:openaccess.firat.edu.tr:11508/80002017-11-30T16:24:27Zcom_11508_11907col_11508_11914

Wear behaviour of stainless steel sintered and alloyed with titanium, cobalt and molybdenum Korkut, Mehmet H. TR30926 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Sintered Powder Metallurgy Wear FeTi FeMo Austenitic Stainless Steels Bu bilimsel makalede, titanyum, kobalt ve molibden ile alaşımlandırılmış ve sinterlenmiş paslanmaz çeliklerin aşınma davranışları incelenmiştir. In this study, a powder mixture was prepared by adding 1–3 wt-% of FeMo, FeTi and Co powders to the austenitic stainless steel powders and samples were produced by the powder metallurgy method. Attempts were made to establish correlations between the microstructure, hardness, toughness, and abrasive wear values of these samples. Wear resistance of the materials was measured by a two body pin-on-disk wear tester. SiC abrasive papers of 65 mm and 177 mm sizes were used as the abrasive media. Wear tests were performed at the loads of 10, 20, and 30 N at room temperature. They showed that the softer, base austenitic stainless steel exhibited higher mass loss than the alloyed samples. Furthermore, the abrasive wear resistance of the base austenitic stainless steel composites increased with increasing FeTi, FeMo,Co content. The wear rate with the 177 mm SiC abrasive paper increased more than that with the 65 mm SiC abrasive paper. 2015-06-11T09:49:40Z 2015-06-11T09:49:40Z 2011 Makale - Bilimsel Dergi Makalesi - Tek Yazarlı Korkut, Mehmet H. (2011). Wear behaviour of stainless steel sintered and alloyed with titanium, cobalt and molybdenum. Powder Metallurgy, 54(3), 286-291. 0032-5899 http://hdl.handle.net/11508/8000 54 3 286;291 İngilizce Powder Metallurgy

oai:openaccess.firat.edu.tr:11508/80032017-11-30T16:24:28Zcom_11508_11907col_11508_11914

Natural convection in divided trapezoidal cavities filled with fluid saturated porous media Varol, Yasin TR25510 Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Trapez Kapalı Ortam Doğal Taşınım Taşınım-İletim Bölünmüş trapez kapalı ortamda akış ve ısı transferinin analizi yapılmıştır. Uniform olmayan sınır şartlarında sabit akım ve eş sıcaklık eğrileri elde edilmiştir. Gözenekli ortam şartlarında farklı Rayleigh sayılarında Nusselt sayıları hesaplanmıştır. A numerical work was performed to determine the heat transfer and fluid flow due to forces in divided trapezoidal enclosures filled with fluid saturated porous media. In the present investigation, bottom wall was non-uniformly heated while two vertical walls were insulated and the top wall was maintained at constant cold temperature. The divider had constant thermal conductivity. Flow patterns and temperature distribution were obtained by solving numerically the governing equations, using Darcy's law. Results are presented for different values of the governing parameters, such as Rayleigh number for a porous medium, location of the partition, thickness of the partition and thermal conductivity ratio between solid and fluid media. It was observed that the conduction mode of heat transfer became dominant inside the cavity for higher thickness of the partition, low Rayleigh numbers, and low thermal conductivity ratio. 2015-06-11T12:43:13Z 2015-06-11T12:43:13Z 2010 Makale - Bilimsel Dergi Makalesi - Tek Yazarlı Varol, Y. (2010). Natural convection in divided trapezoidal cavities filled with fluid saturated porous media. International Communications in Heat and Mass Transfer, 37(9), 1350-1358. http://hdl.handle.net/11508/8003 37 9 1350;1358 10.1016/j.icheatmasstransfer.2010.07.010 İngilizce International Communications in Heat and Mass Transfer

oai:openaccess.firat.edu.tr:11508/80042017-11-30T16:24:28Zcom_11508_11907col_11508_11914

Natural convection for hot materials confined within two entrapped porous trapezoidal cavities Varol, Yasin TR25510 Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Enerji Geri Kazanımı Bitişik Trapez Ortam Doğal Taşınım Bitişik iki trapez ortamda akış ve ısı transfernin analizi sayısal olarak yapılmıştır. Geometrik oran, iletim oranı ve farklı Rayleigh sayılarında enerji analizi yapılmıştır. This paper analyzes the detailed heat transfer and fluid flow within two porous trapezoidal cavities involving cold inclined walls and hot horizontal walls. Flow patterns and temperature distribution were obtained by solving numerically the governing equations, using Darcy's law. Results are presented for different values of the governing parameters, such as Darcy-modified Rayleigh number, aspect ratio of two entrapped trapezoidal cavities and thermal conductivity ratio between the middle horizontal wall and fluid medium. Heat transfer rates are estimated in terms of local and mean Nusselt numbers. Local Nusselt numbers with spatial distribution exhibit monotonic trend irrespective of all Rayleigh numbers for the upper trapezoidal whereas wavy distribution of local Nusselt number occur for the lower trapezoidal. 2015-06-11T12:47:37Z 2015-06-11T12:47:37Z 2012 Makale - Bilimsel Dergi Makalesi - Tek Yazarlı Varol, Y. (2012). Natural convection for hot materials confined within two entrapped porous trapezoidal cavities. International Communications in Heat and Mass Transfer, 39(2), 282-290. http://hdl.handle.net/11508/8004 39 2 282;290 10.1016/j.icheatmasstransfer.2011.11.005 İngilizce International Communications in Heat and Mass Transfer

oai:openaccess.firat.edu.tr:11508/80052017-11-30T16:24:29Zcom_11508_11709col_11508_11716

Numerical investigation of fins effect for melting process of phase change materials Varol, Yasin Okcu, Mutlu TR25510 Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Faz Değiştiren Madde Erime Katılaşma Kanatçık Dikdörtgen geometrili bir ortamda faz değiştiren maddelerin erime katılaşma süreci sayısal olarak incelenmiştir. Geometri içerisine yerleştirilen kanatçıkların ısı transferine etkisi araştırılmıştır. The present study numerically explores the melting process of a phase change materials in a rectangular geometry. More specifically, it investigates flow field, thermal phenomena, detailed phase and melting process by means of numerical simulation which is using as parameter; melting temperature, latent and specific heat capability, thermal conductivity and density in solid and liquid states, are based on paraffin wax. The study is performed for melting in rectangular container of without fin and 5 fins, when the wall temperature is uniform. Transient numerical simulations are performed using the ANSYS-Fluent 12.0 commercial software. The simulation results show that the transient phase change process depends on PCM properties, thermal condition and geometrical parameters of system. It includes the paraffin wax properties, thermal difference between hot and cold wall, and number of fins in the rectangular container. Results also indicate that the presence of fins embedded in the container significantly accelerates the melting process. 2015-06-11T17:02:06Z 2015-06-11T17:02:06Z 2013 Bildiri - Yayımlanmış Bildiri - Kongre ve Sempozyum Varol, Y. ve Okcu, M. (2013). Numerical investigation of fins effect for melting process of phase change materials. Proceedings of ASME 2013 International Mechanical Engineering Congress & Exposition. (ss.1-6). San Diego, California, USA: ASME. http://hdl.handle.net/11508/8005 1;6 Proceedings of ASME 2013 International Mechanical Engineering Congress & Exposition İngilizce San Diego, California, USA ASME

oai:openaccess.firat.edu.tr:11508/80062017-11-30T16:24:28Zcom_11508_11907col_11508_11926

Bovine anaplasmosis in Turkey: First laboratory confirmed clinical cases caused by Anaplasma phagocytophilum Sığır Anaplasmosisi Aktas M, Özübek S. Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Tick-borne fever, RLB, Anaplasma phagocytophilum Anaplasma species are obligate intracellular rickettsial pathogens that affect the health of humans and other animals. Clinical cases of anaplasmosis caused by Anaplasma phagocytophilum were evaluated, and the frequency of bovine Anaplasma species was determined in cattle. Blood samples and thin blood smears were collected from 10 cattle exhibiting clinical signs of tick-borne fever. In addition, blood samples were collected from 123 apparently healthy cattle from the same area. DNA was screened by reverse line blot assay for the presence of the hypervariable V1 region of the 16S rRNA gene of Anaplasma/ Ehrlichia species. Intracytoplasmic inclusion bodies of A. phagocytophilum were observed in neutrophils of 6 sick animals. Parasitemia ranged from 0.2 to 1.6% in individual slides. Reverse line blot showed 45.1% (60/133) of the sampled cattle to be positive for one or more of five Anaplasma species. The frequency of single infections was 20.3% (27/133), while mixed infections were found in 24.8% (33/133) of samples with six different combinations of species and a maximum of four pathogens detected. A. phagocytophilum was the most prevalent (41/133, 30.8%) followed by Anaplasma marginale (25/133, 18.8%), Anaplasma centrale (24/133, 18%), Ehrlichia sp. strain Omatjenne (18/133, 13.5%) and Anaplasma bovis (1/133, 0.7%). This is the first report of A. bovis in a cow from Turkey. This is also the first report of clinical cases caused by A. phagocytophilum in cattle from the country. Therefore, A. phagocytophilum should be taken into account as differential diagnosis in cases of high fever and anorexia in pastured animals. 2015-06-11T17:02:08Z 2015-06-11T17:02:08Z 2015 Makale - Yabancı Dilde Makale Aktas M, Ö. (2015). Bovine anaplasmosis in Turkey: First laboratory confirmed clinical cases caused by Anaplasma phagocytophilum [Sığır Anaplasmosisi]. Veterinary Microbiology, 178(3-4), 246-251. http://hdl.handle.net/11508/8006 178 3-4 246;251 İngilizce Veterinary Microbiology

oai:openaccess.firat.edu.tr:11508/80072015-06-11T19:58:34Zcom_11508_4392com_11508_4391com_11508_4390col_11508_4393

Adli Bilişimde Ağ Cihazlarının Önemi ve Güvenilir Yapılandırmaları Ertam, Fatih Tuncer, Türker Avcı, Engin Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Adli Bilişim, Ağ Adli Bilişimi, Ağ Güvenliği Ağ Cihazları Adli Bilişimi, Bilgi Güvenliği Ağ adli bilişimi, adli bilişimin alt dallarından birisi olarak kabul edilir. Ağ cihazları adli bilişimini ise Ağ adli bilişiminin bir alt dalı olarak görmek mümkündür. Adli bilişim uygulamalarında şüpheli kullanıcıların kişisel bilgisayarlarındaki verilerin tümünün kopyalanarak alınması ve incelenmesi suçun ya da suçsuzluğun tespiti için tek başına yeterli değildir. Kullanıcıların ağ üzerinde gerçekleştirdiği trafiğinde olaydan öncesi ve olay sırasında kaydediliyor olması önemlidir. Bu kayıtların bozulmaması için ağ cihazları üzerinde gerekli güvenlik önlemlerinin alınması, kullanıcının ağ üzerinde istediği cihazları takamaması, ağ sistemi içerisinde internete çıktığı IP adresinin ve MAC adresinin belirgin olması, kullanıcının ağın işleyişini bozma girişimlerinin en aza indirilmesi de oldukça önemlidir. Kullanıcılar, ağ cihazlarındaki kayıtlara müdahale etmemelidirler. Bu çalışmada, hem ağ adli bilişimi incelemelerini kolaylaştırmak hem de ağ güvenliğini artırabilmek için ağ cihazları üzerinde yapılması gereken yapılandırma ayarlarından bahsedilecektir. Network forensics is the capture, recording, and analysis of network events in order to discover the source of security attacks or other problem incidents. Network forensics is a sub-branch of digital forensics. Network device forensics is also a sub-branch of network digital forensics. Forensic IT applications and examination of suspicious users' personal computers to be copied to all of the data alone is not sufficient for the determination of guilt or innocence. Users before the event and during the event is logged on the network traffic to be carried out is important. These records are necessary to preserve the security measures on the network devices, the devices required by the user on the network can not use, the internet user's IP address and MAC address of the output to be significant, the user attempts to disrupt the functioning of the network is very important in minimizing. Users, network devices must not interfere with the records. In this study, as well as to facilitate network forensics investigations on network devices to improve network security configuration settings to be discussed. 2015-06-11T17:02:10Z 2015-06-11T17:02:10Z 2013-07-01 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Ertam, F., Tuncer, T. ve Avcı, E. (2013). Adli Bilişimde Ağ Cihazlarının Önemi ve Güvenilir Yapılandırmaları. E-Journal of New World Sciences Academy, 8(3), 171-181. http://hdl.handle.net/11508/8007 8 3 171;181 NWSA.2013.8.2.1A0349 Türkçe E-Journal of New World Sciences Academy

oai:openaccess.firat.edu.tr:11508/80082015-06-11T17:02:12Zcom_11508_4400com_11508_4399com_11508_4391com_11508_4390col_11508_4403

Temel Bilgi Teknolojileri Kullanımı Ertam, Fatih Kürüm, Hasan Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ bilgisayar 2015-06-11T17:02:12Z 2015-06-11T17:02:12Z 2005-01-01 Kitap - Hem Yazarı Hem Editörü Olan Kitap Ertam, F. (2005). Temel Bilgi Teknolojileri Kullanımı. (Kürüm, H. Ed.). Ankara: Nobel. http://hdl.handle.net/11508/8008 Türkçe Ankara Nobel

oai:openaccess.firat.edu.tr:11508/80092015-06-11T19:53:40Zcom_11508_4395com_11508_4391com_11508_4390col_11508_4397

The Importance of Keeping Network Devices under Control in Big Networks for Network Forensics Ertam, Fatih Tuncer, Türker Avcı, Engin Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ network forensics, network device forensics, network security, open source software, netdisco Network forensics is to capture, record and analyze security attacks and other problems, which might occur on the network. Network forensics is accepted as a sub-branch of digital forensics. Also, it is possible to consider network device forensics as a sub-branch of network forensics. In order to determine whether there is a crime or not, it is not enough to take and scrutinize entire information in the personal computer of suspicious users. The data traffic on the network is significant to be on record before and after the case. It is extremely important to take necessary security measures on network devices so that those records are not damaged. For the purpose of satisfying the necessities which might arise, the network should always be kept under control of the network administrator –before and after the case of digital forensics-. In addition, any activity without the administrator’s knowledge should be prohibited. Especially, following information is crucial to be recorded in order to keep the network under control: • Usage frequency of ports existing in the network devices which are used as switches • The information about whether different devices are in action on the same port at different times or not • Which ports are not used for a long time • Which ports are uplink ports • How many Mac addresses are seen behind the port • The information about vLan (Virtual Local Area Network) numbers on the port. Devices connected on the network should be automatically and periodically detected and reported. Besides, being able to show location of connected devices is another issue that facilitates the network management. Together with so many open-source codes which are practicable for network management, netdisco software is used in order to carry out the processes mentioned above. Tests are executed on a university campus which has 150 manageable switch devices. 2015-06-11T17:02:14Z 2015-06-11T17:02:14Z 2014-05-12 Bildiri - Yayımlanmış Ertam, F., Tuncer, T. ve Avcı, E. (2014). The Importance of Keeping Network Devices under Control in Big Networks for Network Forensics. ISDFS14 Proceedings. (ss.119-124). Houston, ABD: Sam Houston State University, Hunstville, TX. http://hdl.handle.net/11508/8009 119;124 ISDFS14 Proceedings Türkçe Houston, ABD Sam Houston State University, Hunstville, TX

oai:openaccess.firat.edu.tr:11508/80102017-11-30T19:56:47Zcom_11508_12039col_11508_12041

Tetrakis-(2-fenil-4-penten-2-oksi) sübstitüe metalli ftalosiyaninlerin sentezi ve karakterizasyonu Yazıcı, Ayşegül Evliyaoğlu, Merve TR100647 Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Ftalosiyaninlerin sentezi Kobalt Çinko Nickel Nikel Synthesis of phthalocyanines Cobalt Zinc 2-fenil-4-penten-2-ol ile 4-Nitroftalonitrilin nükleofilik yerdeğiştirme reaksiyonu ile monosübstitüe ftalonitril bileşiği 1 sentezlendi. Ftalonitril bileşiğinin tetramerizasyonuyla dört periferal konumda 2-fenil-4-penten-2-oksi sübstitüe metalliftalosiyaninler CoPc 2,NiPc 3 ve CuPc 4 hazırlandı. Yeni sentezlenen bileşikler FT-IR, UV/VIS ve 1H NMR spektrumları ile karakterize edildi. Elektronik spektrumlarında ftalosiyanin halkasının karakteristik π-π* geçişli Q ve n- π* geçişli B bandları görülür. A new monosubstituted phthalonitrile derivative 1 was synthesized by a nucleophilic displacement reaction of 4-nitrophthalonitrile with 2-phenyl-4-pentene-2-ol. Novel metallophthalocyanines CoPc 2,NiPc 3 and CuPc 4 with four peripheral 2-phenyl-4-pentene-2-oxy substituted were prepared by cyclotetramerization of the phthalonitrile. The new synthesized compounds were characterized by FT-IR, UV/VIS and 1H NMR spectra. In the electronic spectra exhibit an intense π-π* transition with characteristic Q and n- π* transition with B bands of the phthalocyanine core. 2015-06-12T06:26:04Z 2015-06-12T06:26:04Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Yazıcı, A. ve Evliyaoğlu, M. (2014). Tetrakis-(2-fenil-4-penten-2-oksi) sübstitüe metalli ftalosiyaninlerin sentezi ve karakterizasyonu. Fırat Üniversitesi Fen Bilimleri Dergisi, 26(1), 9-14. 1308-9064 http://hdl.handle.net/11508/8010 26 1 9;14 Türkçe Fırat Üniversitesi Fen Bilimleri Dergisi

oai:openaccess.firat.edu.tr:11508/80112017-11-30T19:56:45Zcom_11508_12039col_11508_12041

Ayvalık (Ege Denizi) kıyı balıkçılığı üzerine bir ön çalışma Sağlam, Cemil Akyol, Okan Sağlam, Yeşim Demir TR1990 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Ayvalık Su ürünleri kooperatifi Kıyı balıkçılığı Socio-demographics Ege Denizi Coastal fisheries Cooperative Bu araştırma, Ayvalık kıyılarında Ocak-Mart 2013 tarihleri arasında yürütülmüştür. Çalışmada, kooperatifin mevcut durumu, kıyı balıkçılık yapısı, tekne tipleri ve kıyı balıkçılarının bazı sosyo-demografik özellikleri anketler yoluyla ve yerinde gözlemlerle tespit edilmiştir. Çalışma neticesinde bölgenin balıkçılık yapısının genel olarak motor gücü düşük 6-9 metre arası teknelere sahip küçük ölçekli balıkçılardan oluştuğu tespit edilmiştir. Bölgede büyük tekne gruplarından 6 adet gırgır teknesi ve 8 adet trol teknesi bulunmaktadır. Ayvalık limanına bağlı 8 adet trol teknesi bulunmasına rağmen, bölgede trol avcılığı yapan diğer bölge limanlarına bağlı teknelerle birlikte toplam 16 tekne olduğu gözlemlenmiştir. Balıkçıların genel çoğunluğunun; ilkokul mezunu oldukları, evli oldukları, kendilerinin balıkçılığı severek yaptıklarını fakat çocuklarının gelecekte balıkçılık yapmalarını istemedikleri, avladıkları balıkların satışında sıkıntı yaşamadıkları, bölgede bulunan su ürünleri kooperatifinden memnun olmadıkları, trata ile avcılığın yasaklanmasının yanlış olduğunu ve balıkçılığa en çok zararı gırgır teknelerinin verdiğini düşündüklerini ifade etmişlerdir. This study was carried out in the coasts of Ayvalık between January and March 2013. In this study, the current status of the fishery cooperative, the structure of the coastal fishing, boat types and some socio-demographic characteristics of the coastal fishermen have been identified by using questionnaires and on-site observations. In the present study, the engine power is low with small boats (between 6 and 9 m LOA) in the overall of the regions. In the region, there are six purse seiners and eight trawlers as a large scale of vessels. A total of 16 trawlers with those of comes from the other regional ports were observed in the area. General the majority of the fishermen graduated from primary school, most of them are married, they love their jobs but they don’t want to do fishing of their children in the future. There are no problems in the marketing of fish, and they are dissatisfaction from the fishery cooperative and prohibition of beach seining. They claimed that purse seiners are the most harmful to the fishery. 2015-06-12T06:39:25Z 2015-06-12T06:39:25Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Sağlam, C., Akyol, O. ve Sağlam, Y. (2014). Ayvalık (Ege Denizi) kıyı balıkçılığı üzerine bir ön çalışma. Fırat Üniversitesi Fen Bilimleri Dergisi, 26(1), 15-20. 1308-9064 http://hdl.handle.net/11508/8011 26 1 15;20 Türkçe Fırat Üniversitesi Fen Bilimleri Dergisi

oai:openaccess.firat.edu.tr:11508/80152017-11-30T19:56:47Zcom_11508_12039col_11508_12041

Morus alba’ nın meyve ve yaprak ekstrelerinin antioksidan kapasitelerinin belirlenmesi Türkoğlu, Semra Çelik, Sait Keser, Serhat Türkoğlu, İsmail Yılmaz, Ökkeş TR18585 TR117221 TR3369 Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Morus alba Antioksidan kapasite Antiradikal Antioxidantcapacityl Antiradical Bu çalışmada Elazığ’dan toplanan Morus alba’ nın antioksidan ve antiradikal kapasitesi incelendi. Bitkinin yaprakları ve meyveleri gölgede kurutularak ayrı ayrı su ve etanol ekstreleri hazırlandı. Ekstreler soksilet cihazı ile yapıldı. Bu ekstrelerin antioksidan ve antiradikal testleri, toplam antioksidan kapasite, indirgeme gücü kapasitesi, metal şelatlama aktivitesi, DPPH• serbest radikali giderme aktivitesi, ABTS•+ radikali giderme aktivitesi, süperoksit anyon radikalleri giderme aktivitesi, H2O2 giderme aktivitesi ve FRAP testi gibi farklı antioksidan metotlar ve ek olarak toplam fenolik bileşik miktarı tayini kullanılarak farklı konsantrasyonlarda ayrı ayrı belirlendi. Elde edilen sonuçlara bakıldığında dutun yapraklarının ve meyvelerinin iyi bir serbest radikal gidericisi olduğu ve doğal bir antioksidan olarak kullanılabileceği bulundu. In this study Morus alba investigated the antioxidant and antiradical capacity that it was collected from Elazıg. Leaves and fruits of plants dried in shade, water and ethanol extracts were prepared separately . The extracts were made with Soxhlet apparatus. These extracts, antioxidant and antiradical tests, different antioxidant methods such as total antioxidant capacity, reducing power capacity, metal chelating activity, DPPH• free radical scavenging activity, ABTS•+ radical scavenging activity, superoxide anion radicals scavenging activity, H2O2scavenging activity and FRAP test and in addition to by using the amount of the total phenolic compounds determined separately at different concentrations. Looking at the results obtained, leaves and the fruits of mulberry found as a good free radical scavenging and was used as a natural antioxidant. 2015-06-12T12:10:42Z 2015-06-12T12:10:42Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Türkoğlu, S., Çelik, S., Keser, S., Türkoğlu, İ. ve Yılmaz, Ö. (2014). Morus alba’ nın meyve ve yaprak ekstrelerinin antioksidan kapasitelerinin belirlenmesi. Fırat Üniversitesi Fen Bilimleri Dergisi, 26(1), 21-32. 1308-9064 http://hdl.handle.net/11508/8015 26 1 21;32 Türkçe Fırat Üniversitesi Fen Bilimleri Dergisi

oai:openaccess.firat.edu.tr:11508/80122017-11-30T21:21:15Zcom_11508_12039col_11508_12053

A closed-form formula for calculating the Fourier transform of time-limited signals Moradi, Gholamreza Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Jump algorithm Convergence rate Fourier analysis Fourier formulation Fourier transform A new method for calculating the Fourier transform of a function is developed. This method is based on the generalization of the jump formula which is used in calculating the Fourier series of periodic functions. The developed formula is a very user-friend and handy equation. Besides the application of developed routine for calculating the Fourier transform, it is very useful in evaluating the convergence rate of the Fourier transform of the functions. It is believed that the proposed relation will very soon be appeared in Engineering Mathematics text books and communities 2015-06-12T08:01:32Z 2015-06-12T08:01:32Z 2014 Makale - Bilimsel Dergi Makalesi - Tek Yazarlı Moradi, G. (2014). A closed-form formula for calculating the Fourier transform of time-limited signals. Turkish Journal of Science & Technology, 9(1), 1-5. 1308-9099 http://hdl.handle.net/11508/8012 9 1 1;5 İngilizce Turkish Journal of Science & Technology

oai:openaccess.firat.edu.tr:11508/80132017-11-30T21:21:14Zcom_11508_12039col_11508_12053

Effects of Rubus discolor flower extract on the fatty acid composition in hydrogen peroxide administered Wistar rats Keser, Serhat Çelik, Sait Türkoğlu, Semra Yılmaz, Ökkeş Türkoğlu, İ̇smail TR18585 TR9459 TR17824 TR3369 TR117221 Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Rubus discolor Hydrogen peroxide Wistar rat Fatty acid The aim of this research is to examine possible protective effects of Rubus discolor (RD) flower extracts on the fatty acid contents of some tissues, which hydrogen peroxide (HP) administered Wistar rats. In present study, Wistar rats were randomly divided into four groups: 1. Control (C), 2. Hydrogen Peroxide (HP), 3. Rubus discolor (RD), 4. Rubus discolor + Hydrogen Peroxide (RD+HP). In tissues, fatty acid content analyses were performed by gas chromatography. According to our results, while fatty acid levels were barely affected in the heart, muscle, brain and spleen tissues of HP group, but these levels were affected in the serum, liver, kidney and lung tissues of the same group when compared to the control group. The fatty acid contents were changed in all tissues of RD and RD+HP groups when compared to control group. Our results confirm that RD and HP treatment have affected the amount of important fatty acids, which substrates in fatty acids metabolism of Wistar rats. In also, this study is first report about the effects of R. discolor flower extract on the fatty acid composition. Bu çalışmanın amacı hidrojen peroksit (HP) uygulanmış Wistar sıçanların bazı dokularının yağ asidi içeriği üzerinde Rubus discolor (RD) çiçek ekstresinin olası koruyucu etkilerini incelemektir. Sunulan çalışmada, Wistar sıçanlar rastgele 4 ayrı gruba ayrıldı: 1. Kontrol (C), 2. Hidrojen Peroksit (HP), 3. Rubus discolor (RD), 4. Rubus discolor + Hidrojen Peroksit (RD+HP). Dokulardaki yağ asidi içeriği gaz kromatografisi cihazıyla analiz edildi. Sonuçlarımıza göre, kontrol grubuyla karşılaştırıldığı zaman, HP grubunun kalp, kas, beyin ve dalak dokusunda yağ asidi seviyeleri hemen hemen hiç etkilenmezken, aynı grubun serum, karaciğer, böbrek ve akciğer dokularında yağ asitleri seviyeleri etkilenmiştir. RD ve RD+HP gruplarının bütün dokularında yağ asidi içeriği kontrol grubuna göre değişmiştir. Sonuçlarımız göstermiştir ki RD ve HP uygulaması, Wistar sıçanların yağ asidi metabolizmasında substrat olan bazı önemli yağ asitlerinin miktarını etkilemiştir. Ayrıca bu çalışma R. discolor çiçek ekstresinin yağ asidi içeriği üzerindeki etkileri hakkında ilk rapordur. 2015-06-12T08:39:15Z 2015-06-12T08:39:15Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Keser, S., Çelik, S., Türkoğlu, S., Yılmaz, Ö. ve Türkoğlu, İ. (2014). Effects of Rubus discolor flower extract on the fatty acid composition in hydrogen peroxide administered Wistar rats. Turkish Journal of Science & Technology, 9(1), 7-16. 1308-9099 http://hdl.handle.net/11508/8013 9 1 7;16 İngilizce Turkish Journal of Science & Technology

oai:openaccess.firat.edu.tr:11508/80142017-11-30T16:24:27Zcom_11508_11907col_11508_11914

Investigation of the Tensile Strength of Bending in Buildings Plasters with Silica Fumes Keleştemur, Oğuzhan Yıldız, Servet Yalınbaş, Muhammed TR58964 TR12078 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Alçı Silis dumanı Malzeme Bu çalışmada, yapı alçıları ile Antalya Etibank Elektrometalurji İşletmesi Tesisleri’nde tutulan silis dumanlarının birlikte kullanılabilirliği araştırılmıştır. Yapı alçısı olarak kullanılan kartonpiyer alçısının SiFeCr baca tozu ile hacimce %5, %10, %15, %20 ve %25 oranlarında yer değiştirilmesi neticesinde elde edilen numuneler, birim ağırlık, boşluk oranı ve eğilmede çekme dayanımı açısından kontrol numuneleri ile karşılaştırılmıştır. Hazırlanan karışımlara, silis dumanı miktarınca su ilavesi yapılarak silis dumanının katılmasıyla meydana gelen su ihtiyacındaki artış karşılanmış ve süperakışkanlaştırıcı katkı maddesi kullanımına gerek kalmamıştır. Yapılan çalış- ma neticesinde; silis dumanı katkısının, kartonpiyer alçısının birim ağırlığı ve boşluk miktarında azalma, eğilmede çekme dayanımında ise artış meydana getirdiği belirlenmiştir. Çalışmanın sonucu olarak, SiFeCr baca tozunun kartonpiyer alçısı ile %10 - %15 oranında yer değiştirmesi neticesinde en iyi sonucun alındığı belirlenmiştir. 2015-06-12T12:06:13Z 2015-06-12T12:06:13Z 2005 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Yalınbaş, M., Yıldız, S. ve Keleştemur, O. (2005). Investigation of the Tensile Strength of Bending in Buildings Plasters with Silica Fumes. Journal of the Faculty of Engineering and Architecture of Gazi University, 20(3), 395-399. http://hdl.handle.net/11508/8014 20 3 395;399 Türkçe Journal of the Faculty of Engineering and Architecture of Gazi University

oai:openaccess.firat.edu.tr:11508/80162017-11-30T16:24:35Zcom_11508_11907col_11508_11914

Effect of Various Dual-Phase Heat Treatments on the Corrosion Behavior of Reinforcing Steel Used in the Reinforced Concrete Structures Keleştemur, Oğuzhan Yıldız, Servet TR58964 TR12078 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Corrosion Concrete Microstructure Martensite Dual-phase steel In this study, corrosion behavior of six different dual-phase (DP) steels with varying morphologies and martensite content has been examined in comparison to ferrite–pearlite steel in concrete. Intercritical annealing and intermediate quenching heat treatments have been applied to the reinforcing steel in order to obtain DP steels with different morphologies and content of martensite. Corrosion experiments were conducted in two stages. In the first stage, the corrosion potential of steels embedded in concrete was measured every day for a period of 30 days in accordance with ASTM C 876 standard. In the second stage, anodic and cathodic polarization values of these steels were obtained and then the corrosion currents were determined with the aid of cathodic polarization curves. It has been observed that both the amount of martensite and the morphology of the phase constituents have definite effect on the corrosion behavior of DP steel embedded in concrete. As a result of this study, it is found that corrosion rate of dual-phase steel has increased with increase amount of martensite. 2015-06-12T12:11:56Z 2015-06-12T12:11:56Z 2009 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Keleştemur, O. ve Yıldız, S. (2009). Effect of Various Dual-Phase Heat Treatments on the Corrosion Behavior of Reinforcing Steel Used in the Reinforced Concrete Structures. Construction and Building Materials, 23(1), 78-84. http://hdl.handle.net/11508/8016 23 1 78;84 İngilizce Construction and Building Materials

oai:openaccess.firat.edu.tr:11508/80172017-11-30T16:24:26Zcom_11508_11907col_11508_11914

Corrosion Behavior of Tempered Dual-Phase Steel Embedded in Concrete Keleştemur, Oğuzhan Aksoy, Mustafa Yıldız, Servet TR58964 TR4904 TR12078 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Dual-phase steel Corrosion Tempering treatment Martensite Concrete Dual-phase (DP) steels with different martensite contents were obtained by appropriate heat treatment of an SAE1010 structural carbon steel, which was cheap and widely used in the construction industry. The corrosion behavior of DP steels in concrete was investigated under various tempering conditions. Intercritical annealing heat treatment was applied to the reinforcing steel to obtain DP steels with different contents of martensite. These DP steels were tempered at 200, 300, and 400°C for 45 min and then cooled to room temperature. Corrosion experiments were conducted in two stages. In the first stage, the corrosion potential of DP steels embedded in concrete was measured every day for a period of 30 d based on the ASTM C 876 standard. In the second stage, the anodic and cathodic polarization values of these steels were obtained and subsequently the corrosion currents were determined with the aid of cathodic polarization curves. It was observed that the amount of second phase had a definite effect on the corrosion behavior of the DP steel embedded in concrete. As a result of this study, it is found that the corrosion rate of the DP steel increases with an increase in the amount of martensite. 2015-06-12T12:19:12Z 2015-06-12T12:19:12Z 2009 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Keleştemur, O., Aksoy, M. ve Yıldız, S. (2009). Corrosion Behavior of Tempered Dual-Phase Steel Embedded in Concrete. International Journal of Minerals, Metallurgy and Materials, 16(1), 43-50. http://hdl.handle.net/11508/8017 16 1 43;50 İngilizce International Journal of Minerals, Metallurgy and Materials

oai:openaccess.firat.edu.tr:11508/80182017-11-30T16:24:34Zcom_11508_11907col_11508_11926

The effects of diminazene aceturate and ceftriaxone on ram sperm Koç sperması üzerine diminazen aseturat ve seftriaksonun etkileri Tanyıldızı, S Türk, G Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ diminazen ceftriaxone Effects of diminazene aceturate and ceftriaxone disodium were evaluated on sperm quality of rams. Daily intramuscular injections of diminazene (6 mg/kg) or ceftriaxone (28.5 mg/kg) were given to each of seven Akkaraman rams assigned per drug for two days. Semen samples were collected from the rams at post-treatment 1, 4, 24, 48, 72, 144, 288 and 336 h and examined for sperm characteristics and hyaluronidase activity. Results showed that use of ceftriaxone and diminazene caused significant (P < 0:01) decreases in sperm concentration, volume and motility compared to control group within 288 h post-treatment. In addition, hyaluronidase activity increased significantly (P < 0:01) in semen of rams treated with ceftriaxone while remained unchanged in those received diminazene. In conclusion, diminazene aceturate and ceftriaxone disodium did not have any deleterious effect on hyaluronidase enzyme. However, both drugs caused impairment of sperm in rams during the 288 h. 2015-06-12T12:23:10Z 2015-06-12T12:23:10Z 2004 Makale - Yabancı Dilde Makale Tanyıldızı, S. ve Türk, G. (2004). The effects of diminazene aceturate and ceftriaxone on ram sperm [Koç sperması üzerine diminazen aseturat ve seftriaksonun etkileri]. Theriogenology, 61(2-3), 529-535. http://hdl.handle.net/11508/8018 61 2-3 529;535 İngilizce Theriogenology

oai:openaccess.firat.edu.tr:11508/80242017-11-30T19:56:46Zcom_11508_12039col_11508_12041

Gyrodactylus scardiniensis ve Gyrodactylus prostae (Platyhelminthes) türlerinin anatomik ve morfolojik özellikleri üzerine bir araştırma Yazmen, Hüseyin Öztürk, M. Oğuz TR8094 Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Gyrodactylus scardiniensis Gyrodactylus prostae Leuciscus Bu çalışmada, Nisan 2010 ile Mayıs 2011 tarihleri arasında Taşoluk Baraj Gölü’nden temin edilen 150 Leuciscus cephalus bireyinin Gyrodactylus parazitleri üzerinde incelemeler yapılmış ve iki Gyrodactylus türü tanımlanmıştır. 272 adet Gyrodactylus scardiniensis (%21.3, 6.6±4.1) konak balıkların solungaç lameli ve yüzgeçlerinde, 64 adet Gyrodactylus prostae (%5.3, 6.6±4.1) solungaç yaylarında kaydedilmiştir. Bu türler Türkiye parazit faunası için yeni kayıt özelliği taşımaktadır. Bu çalışmada söz konusu iki Gyrodactylus türünün anatomik ve morfolojik özellikleri ayrıntılı olarak belirlenmiştir. In this study, the presence of Gyrodactylus parasites on 150 Leuciscus cephalus specimens from Taşoluk Dam Lake, Turkey were investigated between April 2010 and May 2011, and two Gyrodactylus species were identified: 272 Gyrodactylus scardiniensis (%21.3, 6.6±4.1) was found on gill branches and fins of the host fish specimens; 64 Gyrodactylus prostae (%5.3, 6.6±4.1) on gill arches. These species are new records for parasite fauna of Turkey. In this study, anatomic and morphological features of these two Gyrodactylus species were determined in detail. 2015-06-12T12:59:35Z 2015-06-12T12:59:35Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Yazmen, H. ve Öztürk, M. (2014). Gyrodactylus scardiniensis ve Gyrodactylus prostae (Platyhelminthes) türlerinin anatomik ve morfolojik özellikleri üzerine bir araştırma. Fırat Üniversitesi Fen Bilimleri Dergisi, 26(1), 33-37. 1308-9064 http://hdl.handle.net/11508/8024 26 1 33;37 Türkçe Fırat Üniversitesi Fen Bilimleri Dergisi

oai:openaccess.firat.edu.tr:11508/80192017-11-30T16:24:26Zcom_11508_11907col_11508_11926

Effects of levamisole on hyaluronidase activity and sperm characteristics in rams Bozkurt, T Tanyıldızı, S Türk, G TR146975 TR4550 TR56229 Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ levamisole, sperm, ram The aim of this study was to determine the effects of levamisole on sperm characteristics and hyaluronidase activity of blood serum and semen. For this purpose, 12 Akkaraman rams (2–3 years old) were used. Levamisole hydrochloride was administered orally at a dose of 7.5 mg/kg body weights once daily for 2 days. Serum and semen samples were collected from the rams at posttreatment 1, 2, 4, 24, 48, 72, 96, 120, 144, 216, 288 and 384 h and examined for sperm characteristics and hyaluronidase activity. The results showed that the use of levamisole caused significant (P < 0:01) increase in serum hyaluronidase activity at all times except the 72 h, and in semen hyaluronidase activity at 1, 2, 4, 24, 72, 96 and 120 h compared to the control group. In addition, the levamisole caused significant (P < 0:05) decreases in semen volume, sperm motility, concentration and total sperm number at all times. There was no correlation between semen hyaluronidase activity and the sperm characteristics. In conclusion, levamisole did not have any deleterious effect on hyaluronidase enzyme. However, the use of this drug in rams during the breeding season is harmful due to the decrease of sperm characteristics. 2015-06-12T12:34:00Z 2015-06-12T12:34:00Z 2004 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Bozkurt, T., Tanyıldızı, S. ve Türk, G. (2004). Effects of levamisole on hyaluronidase activity and sperm characteristics in rams. Theriogenology, 62(1-2), 323-329. http://hdl.handle.net/11508/8019 62 1-2 323;329 İngilizce Theriogenology

oai:openaccess.firat.edu.tr:11508/80202017-11-30T16:24:35Zcom_11508_11907col_11508_11926

The effect of ascorbic acid supplementation on sperm quality, lipid peroxidation and testosterone levels in male wistar rats Erkek Wistar sıçanlarda askorbik asit ilavesinin sperm kalitesi, lipid peroksidasyon ve testosteron düzeyleri üzerine etkisi Sönmez, M Türk, G Yüce, A Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Ascorbic acid Rat Testosterone Epididymal sperm concentration This study was conducted to investigate the effects of ascorbic acid supplementation in drinking water on semen quality, lipid peroxidation and plasma testosterone level of male rats. In this investigation, 24 maleWistar rats were used. The animals were divided into three group, and 500, 250 and 0 (control) mg/kg/day ascorbic acid were supplemented with drinking water of rats in Groups A, B and C during 8 weeks, respectively. Ascorbic acid supplementation did not increase in the body weight and weights of the testis, epididymis, seminal vesicles and ventral prostate. Exogenous supplementation with ascorbic acid significantly increased (P < 0.05) the concentration of ascorbic acid in the testes and blood plasma, and the level of lipid peroxidation significantly decreased (P < 0.05) in these locations. There was no significant difference in spermatozoon motility among the three groups. However, epididymal sperm concentration and plasma testosterone level significantly increased (P < 0.05) in the ascorbic acid treated animals when compared to the control animals. The results suggest that ascorbic acid supplementation improves reproductive traits of male rats that are associated with high fertility. 2015-06-12T12:39:50Z 2015-06-12T12:39:50Z 2005 Makale - Yabancı Dilde Makale Sönmez, M., Türk, G. ve Yüce, A. (2005). The effect of ascorbic acid supplementation on sperm quality, lipid peroxidation and testosterone levels in male wistar rats [Erkek Wistar sıçanlarda askorbik asit ilavesinin sperm kalitesi, lipid peroksidasyon ve testosteron düzeyleri üzerine etkisi]. Theriogenology, 63(7), 2063-2072. http://hdl.handle.net/11508/8020 63 7 2063;2072 İngilizce Theriogenology

oai:openaccess.firat.edu.tr:11508/80212017-11-30T16:24:33Zcom_11508_11907col_11508_11926

Effect of season on some fertility parameters of dairy and beef cows in Elazığ province ElazÝÛ Y resindeki Et i ve S t Üneklerin BazÝ Fertilite Parametreleri zerine Mevsimin Etkisi Sönmez, M Demirci, E Türk, G Gür, S Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Cow heat stress season conception rate fertility This study was conducted to investigate the effects of seasons on some fertility parameters of dairy and beef cows in ElazÝÛ province. A total of 511 multiparous dairy and beef cows in four commercial herds were used as material in the study. Climatic data were obtained from reports prepared at the Department of Meteorology in ElazÝÛ. Daily maximum, minimum and average ambient temperatures and relative humidity were recorded throughout the year. Estruses were detected by observation twice a day. The expression of overt estrus was evaluated observing the degrees of signs of estrus. Cows were inseminated artificially after about 12 h from beginning estrus. First-service conception rates were determined by rectal palpation on the 75th day after insemination. Intensity of estrus signs were significantly affected by the seasons, especially in dairy cows. While the expression of overt estrus decreased in the cows inseminated during the hot months of the year, it increased in spring compared to the other seasons. The cows inseminated in summer had significantly lower conception rates than cows inseminated in other seasons. Moreover, this decrease in conception rate in dairy cows appeared to be carried into autumn. In conclusion, heat stress during summer resulted in a decrease in the exhibition of estrus behavior and conception rates of dairy and beef cows. Therefore, additional reproductive strategies are needed to counteract the adverse effect of heat stress on fertility during summer. 2015-06-12T12:46:28Z 2015-06-12T12:46:28Z 2005 Makale - Yabancı Dilde Makale Sönmez, M., Demirci, E., Türk, G. ve Gür, S. (2005). Effect of season on some fertility parameters of dairy and beef cows in Elazığ province [ElazÝÛ Y resindeki Et i ve S t Üneklerin BazÝ Fertilite Parametreleri zerine Mevsimin Etkisi]. Turkish Journal of Veterinary and Animal Sciences, 29(3), 821-828. http://hdl.handle.net/11508/8021 29 3 821;828 İngilizce Turkish Journal of Veterinary and Animal Sciences

oai:openaccess.firat.edu.tr:11508/80222017-11-30T16:24:36Zcom_11508_11907col_11508_11926

Short term effects of dexamethasone on hyaluronidase activity and sperm characteristics in rams Koçlarda deksametazonun hyaluronidaz aktivitesi ve sperm özellikleri üzerine kısa süreli etkileri Gür, S Bozkurt, T Türk, G Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Dexamethasone Hyaluronidase Serum Semen Ram The aim of this study was to determine the effects of dexamethasone on sperm characteristics and hyaluronidase activity of serum and semen. In this investigation, 14 healthy Akkaraman rams, at the age of 2 years and weighing between 50–60 kg, were used. The rams were randomly divided into two groups. After the last administration of dexamethasone intramuscularly at a dose of 0.25 mg/kg, semen and blood samples were taken at different times. The results showed that the serum hyaluronidase activity was increased significantly (p < 0.001) in the treatment group when compared with the control group except for the 1st hour. There was a significant difference (p < 0.001, 0.01, 0.05) in the hyaluronidase activity of semen between the treatment group and the control group. Furthermore, there was a significant difference (p < 0.01) in sperm concentration between both groups at all the times except the 96th hour. There were statistically significant (p < 0.05) differences in semen volume between the treatment and control groups. There were also significant differences (p < 0.05) in sperm motility between the treatment and control groups except for the 72 and 96th hours. These findings indicate that dexamethasone increases hyaluronidase activity of serum and semen, but it decreases sperm concentration, semen volume and sperm motility in rams. Therefore the use of these drugs in breeding rams during breeding season is not suitable. 2015-06-12T12:50:54Z 2015-06-12T12:50:54Z 2005 Makale - Yabancı Dilde Makale Gür, S., Bozkurt, T. ve Türk, G. (2005). Short term effects of dexamethasone on hyaluronidase activity and sperm characteristics in rams [Koçlarda deksametazonun hyaluronidaz aktivitesi ve sperm özellikleri üzerine kısa süreli etkileri]. Animal Reproduction Science, 90(3-4), 255-263. http://hdl.handle.net/11508/8022 90 3-4 255;263 İngilizce Animal Reproduction Science

oai:openaccess.firat.edu.tr:11508/80232017-11-30T16:24:36Zcom_11508_11907col_11508_11926

Protective role of lycopene on cisplatin-induced changes in sperm characteristics, testicular damage and oxidative stress in rats Sıçanlarda sispilatinin neden olduğu sperm özellikleri, testiküler hasar ve oksidatif stres üzerine likopenin koruyucu rolü Ateşşahin, A Karahan, İ Türk, G Gür, S Yılmaz, S Çeribaşı, Ao Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Cisplatin Lycopene Sperm characteristics Testosterone Lipid peroxidation Histopathology Rat The aim of this studywas to investigate the possible protective role of lycopene on cisplatin (CP)-induced spermiotoxicity using quantitative, biochemical and histopathological approaches. Adult male Sprague–Dawley rats were randomly divided into four groups. The control group received physiological saline; animals in cisplatin group received only cisplatin; pre-treatment group received a 10-day of lycopene before administration of cisplatin while animals in post-treatment group received a 5-day of lycopene following administration of cisplatin. Cisplatin (7 mg kg−1) was intraperitoneally (i.p.) injected as a single dose and lycopene (4 mg kg−1) was administered by gavage in corn oil. Traits of reproductive organs; sperm characteristics, testicular histological findings, plasma testosterone levels and the testicular tissue oxidative status were determined. Administration of cisplatin to rats decreased sperm concentration (p<0.05) and sperm motility (p<0.001), increased total abnormal sperm rates (p<0.05) as compared with the control group. While a marked normalization was achieved only in sperm concentration with lycopene in pre-treatment group, significant normalizations were achieved in the sperm concentration, sperm motility, total abnormal sperm rates in posttreatment group. No significant differences in levels of testosterone were observed among all groups. An increase in testes malondialdehyde concentrations (p<0.05) and glutathione peroxidase activities (p<0.001) were detected while significant decreases in glutathione levels (p<0.001) in cisplatin alone group when compared to control group. While pre-treatment with lycopene restoring only malondialdehyde concentrations, its post-treatment caused normalization in both malondialdehyde and glutathione levels when compared with the cisplatin alone group. On the other hand, significant increases were determined in GSH-Px activities in all experimental groups when compared with the control group. Although the mechansim is not clear, the results from this experimental study suggest that the lycopene have a possible protective effect against cisplatin-induced spermiotoxicity, effect of giving lycopene after cisplatin being superior to the giving it before cisplatin. 2015-06-12T12:56:51Z 2015-06-12T12:56:51Z 2006 Makale - Yabancı Dilde Makale Ateşşahin, A., Karahan, İ., Türk, G., Gür, S., Yılmaz, S. ve diğerleri. (2006). Protective role of lycopene on cisplatin-induced changes in sperm characteristics, testicular damage and oxidative stress in rats [Sıçanlarda sispilatinin neden olduğu sperm özellikleri, testiküler hasar ve oksidatif stres üzerine likopenin koruyucu rolü]. Reproductive Toxicology, 21(1), 42-47. http://hdl.handle.net/11508/8023 21 1 42;47 İngilizce Reproductive Toxicology

oai:openaccess.firat.edu.tr:11508/80252017-11-30T16:24:35Zcom_11508_11907col_11508_11926

Lycopene prevents adriamycin-induced testicular toxicity in rats Likopen adriamisinin neden olduğu testiküler toksisiteyi önler Ateşşahin, A Türk, G Karahan, İ Yılmaz, S Çeribaşı, Ao Bulmuş, Ö Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Lycopene adriamycin testicular function toxicity Objective: To investigate a possible protective role of lycopene on adriamycin (ADR)-induced spermiotoxicity using quantitative, biochemical and histopathological approaches. Design: Experimental study. Setting: Firat University Medical School, Experimental Research Centre, Elazig, Turkey. Animals: Twenty four Sprague Dawley rats (8-weeks old) Intervention(s): Adriamycin (10 mg kg 1) was intraperitoneally injected and lycopene (4 mg kg 1) was administered by gavage in corn oil. Main outcome measure(s): Reproductive organ weights were evaluated along with epididymal sperm concentration, motility and morphology. Testicular histological findings, oxidative status and plasma testosterone levels were also determined. Result(s): Lycopene ameliorated ADR-induced reductions in both testes and epididymis weights. ADR decreased sperm motility, increased total abnormal sperm rates, but epididymal sperm concentration was not changed compared to control. A marked normalization was achieved in sperm motility and morphology in pretreatment with lycopene. Although testosterone level was decreased in ADR group compared to control, no changes were observed in pretreatment group. An increase in malondialdehyde and a decrease reduced glutathione concentrations were detected in alone ADR group compared to control. Pretreatment with lycopene restored significantly malondialdehyde and reduced glutathione concentrations. ADR caused severe degenerative changes in germinative cells, atrophy in the diameter size of seminiferous tubules and germinative cell thickness. However, ADR-induced histopathological alterations were effectively reverted by pretreatment with lycopene. Conclusion(s): This study clearly indicates that ADR treatment markedly impaired testicular function and that pretreatment with lycopene might prevent this toxicity. 2015-06-12T13:01:57Z 2015-06-12T13:01:57Z 2006 Makale - Yabancı Dilde Makale Ateşşahin, A., Türk, G., Karahan, İ., Yılmaz, S., Çeribaşı, A. ve diğerleri. (2006). Lycopene prevents adriamycin-induced testicular toxicity in rats [Likopen adriamisinin neden olduğu testiküler toksisiteyi önler]. Fertility and Sterility, 85(Suppl 1), 1216-1222. http://hdl.handle.net/11508/8025 85 Suppl 1 1216;1222 İngilizce Fertility and Sterility

oai:openaccess.firat.edu.tr:11508/80262017-11-30T16:24:26Zcom_11508_11907col_11508_11926

In vitro effects of prostaglandin F2α and metamizol on motility of diluted bull semen Sulandırılmış Boğa Spermalarının Motilitesi zerine Prostaglandin F2a ve Metamizolun İn Vitro Etkileri Karahan, İ Türk, G Gür, S Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Bull semen PGF2a metamizol sperm motility The purpose of the present study was to investigate in vitro effects of prostaglandin F2 alpha (PGF2a) and metamizol on the motility of diluted bull semen during short-term storage at 4 ¼C. In this study, 3 healthy adult Brown-Swiss bulls, each 3 years old, were used. Semen samples were collected with an artificial vagina. Samples were taken from each bull twice a week over the course of 3 weeks (6 samples per bull). One millilitre of semen was removed from each sample for the determination of semen volume, mass activity, initial motility, sperm concentration, and abnormal sperm rate. The remainder of the semen samples of each bull were diluted to a concentration of 1:10 (semen:extender) with isotonic sodium citrate + egg yolk solution. The diluted semen samples were then divided into 12 sterile tubes of equal volume (0.5 ml). Different amounts of PGF2a [0 (PGF2a-free), 125, 250, 500, 1000, and 1500 µg] were added to 6 of these samples at 37 ¼C. Similarly, different amounts of metamizol [0 (metamizolfree), 125, 250, 500, 1000, and 1500 µg] were added to the other 6 samples at 37 ¼C. After the supplementation of PGF2a or metamizol, all semen samples were stored at 4 ¼C. The sperm motility of the samples was examined at 0, 1, 2, 4, 24, 48, 72, 96, 120, 144, 168, 192, and 216 h. No significant differences in spermatological characteristics were determined between the bulls. Sperm supplementation with 125 µg and 250 µg PGF2a caused a statistically significant increase (P < 0.05) in the motility of diluted semen stored at 4 ¼C after 24 h versus diluted PGF2a-free semen. However, the supplementation with 500 µg and 1000 µg PGF2a caused significant motility decreases after 4 h, while 1500 µg PGF2a also caused a decrease after 2 h compared to diluted PGF2a-free semen (P < 0.05). On the other hand, metamizol supplementation of 125 µg and 250 µg significantly decreased the motility of diluted semen stored at 4 ¼C after 48 hand 24 h, respectively, while 500 µg, 1000 µg, and 1500 µg of metamizol reduced motility after 4 h (P < 0.05) in comparison to the diluted metamizol-free semen. In conclusion, the addition of small amounts of PGF2a to diluted bull semen samples may help to maintain sperm motility during short-term storage at 4 ¼C. 2015-06-12T13:07:28Z 2015-06-12T13:07:28Z 2006 Makale - Yabancı Dilde Makale Karahan, İ., Türk, G. ve Gür, S. (2006). In vitro effects of prostaglandin F2α and metamizol on motility of diluted bull semen [Sulandırılmış Boğa Spermalarının Motilitesi Turkish Journal of Veterinary and Animal Sciences, 30(2), 271-278. http://hdl.handle.net/11508/8026 30 2 271;278 İngilizce Turkish Journal of Veterinary and Animal Sciences

oai:openaccess.firat.edu.tr:11508/80272017-11-30T16:24:25Zcom_11508_11907col_11508_11926

Chemoprotective effect of melatonin against cisplatin-induced testicular toxicity in rats Sıçanlarda sispilatinin neden olduğu testiküler toksisiteye karşı melatoninin koruyucu etkisi Ateşşahin, A Şahna, E Türk, G Çeribaşı, Ao Yılmaz, S Yüce, A Bulmuş, Ö Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ cisplatin histopathology lipid peroxidation melatonin oxidative stress sperm characteristics In this study, we investigated the effect of melatonin on cisplatininduced spermiotoxicity using quantitative, biochemical and histopathological approaches. Cisplatin (CP, 7 mg/kg) and melatonin (10 mg/kg) were intraperitoneally injected. The rats were decapitated on 5th (short-term group) or 50th day (long-term group) after CP injection. Traits of reproductive organs, sperm characteristics, testicular histological findings, and the lipid peroxidation in the testicular tissue were determined. Melatonin mitigated CP-induced reductions in testes, epididymis and accessory gland weights in rats decapitated on day 5. Both short- and long-term CP treatment decreased sperm concentration, sperm motility and increased abnormal sperm rates compared with the control. But the reduction of sperm concentration in long-term CP treatment was insignificant. Although treatment with melatonin provided moderately normalization with respect to sperm concentration in short-term treatment group, melatonin caused a marked normalization of sperm motility in both CP + melatonin groups. Both groups treated with the melatonin showed decreases in abnormal sperm rates compared with alone CP. While testicular malondialdehyde levels were elevated after CP treatment, glutathione peroxidase activity decreased significantly in both groups. Glutathione levels reduced after long-term treatment, but not in short-term group by CP administration. Treatment with CP plus melatonin provided significant amelioration of oxidative stress parameters. Histopathological findings of testes in both short- and long-term treatment groups paralleled the biochemical and spermatogenic results. This study clearly indicates that CP-treatment impaired markedly testicular function and combined treatment with melatonin prevented much of the toxicity in rats. 2015-06-12T13:13:15Z 2015-06-12T13:13:15Z 2006 Makale - Yabancı Dilde Makale Ateşşahin, A., Şahna, E., Türk, G., Çeribaşı, A., Yılmaz, S. ve diğerleri. (2006). Chemoprotective effect of melatonin against cisplatin-induced testicular toxicity in rats [Sıçanlarda sispilatinin neden olduğu testiküler toksisiteye karşı melatoninin koruyucu etkisi]. Journal of Pineal Research, 41(2), 21-27. http://hdl.handle.net/11508/8027 41 2 21;27 İngilizce Journal of Pineal Research

oai:openaccess.firat.edu.tr:11508/80282017-11-30T16:24:34Zcom_11508_11907col_11508_11926

A molecular and parasitological survey of Hepatozoon canis in domestic dogs in Turkey Aktas M, Özübek S, Altay K, Balkaya I, Utuk Ae, Kırbas A, Şimsek S, Dumanlı N Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Hepatozoon canis In this study, asymptomatic dogs in nine provinces of Turkey were surveyed to investigate the prevalence and intensity of Hepatozoon canis infection. DNA obtained from blood samples collected from 694 domestic dogs (243 stray, 288 shelter, and 163 pets) of both genders and varying ages were evaluated by polymerase chain reaction (PCR). In addition, 285 thin blood smears prepared from these blood samples were also evaluated for microscopic examination. Direct microscopy revealed Hepatozoon gamonts in the peripheral blood of three of 285 (1.0%; 95% confidence interval (CI): 0.21–3.04) tested. Using PCR, 155 of the 694 (22.3%; 95% CI: 19.28–25.61) were found to be positive for the presence of H. canis DNA. The prevalence of infection was higher in adult dogs (26.2%; 95% CI: 22.1–30.7) than young animals (16.4%; 95% CI: 12.2–21.3). Although the prevalence determined by PCR was higher in male dogs (24.5%; 95% CI: 19.6–29.9) than in female dogs (20.8%; 95% CI: 16.9–25.1), gender differences were not significant. Pet dogs had a lower prevalence of infection (10.4%; 95% CI: 6.2–16.2) compared to stray (26.3%; 95% CI: 20.9–32.3) and shelter dogs (25.7%; 95% CI: 20.7–31.1), but no significant association between stray and shelter dogs was found for the presence of the parasite. Partial sequences of the 18S ribosomal RNA (rRNA) gene shared 99–100% similarity with the corresponding H. canis isolates. This epidemiological survey revealed a high prevalence of H. canis in dogs from several provinces in Turkey, and it suggests that the age and origin are associated with the parasite. 2015-06-12T13:16:53Z 2015-06-12T13:16:53Z 2005 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Aktas M. Özübek S, Altay K, Balkaya I, Utuk Ae, Kırbas A, Şimsek S, Dumanlı N, (2005). A molecular and parasitological survey of Hepatozoon canis in domestic dogs in Turkey. Veterinary parasitology, 209(3-4), 264-267. http://hdl.handle.net/11508/8028 209 3-4 264;267 İngilizce Veterinary parasitology

oai:openaccess.firat.edu.tr:11508/80292017-11-30T16:24:23Zcom_11508_11907col_11508_11926

İneklerde gebelik oranı üzerine gözlem yöntemi ve progesteron test kitleriyle yapılan östrus tespitinin etkisi Sönmez, M Türk, G Demirci, E Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Gebelik oranı gözlem yöntemi inek östrus tespiti progesteron düzeyi Bu çalışma, saha koşullarında progesteron test kitleri ile progesteron seviyesinin belirlenmesi ve gözlem yöntemi kullanılarak yapılan östrus tespitinin etkinliğini karşılaştırmak ve progesteron testlerinin ineklerin gebelik oranları üzerine olumlu bir etkisinin olup olmadığını araştırmak amacıyla yapıldı. Bu araştırmada materyal olarak 136 inek kullanıldı. İnekler gözlem yöntemiyle takip edilerek östrus belirtileri kaydedildi. Gözlenen östrus belirtilerinin şiddetine göre hayvanlar üç alt gruba ayrıldı. Serum örneklerinde progesteron test kitleri ile progesteron seviyeleri belirlendi. Progesteron düzeylerine göre de hayvanlar üç alt gruba ayrıldı. Daha sonra ineklerin hepsi suni tohumlama yöntemiyle tohumlandı. Tohumlamayı takip eden 55–60. günlerde rektal palpasyonla gebelikler teşhis edildi. Bu çalışmada tohumlamalardan elde edilen ortalama gebelik oranı % 65.4 olarak kaydedildi. Kuvvetli östrus belirtisi gösteren ineklerin gebelik oranı (% 76.5), hiç belirti göstermeyen ineklerinkinden (% 53.7) önemli ölçüde yüksek (p<0.05) bulundu. Tohumlama sırasında progesteron düzeyi düşük olan (<1 ng/ml) ineklerdeki gebelik oranının (% 78.5), progesteron düzeyi orta seviyede olan (1–2.5 ng/ml) ineklerinkinden (% 23.8) önemli derecede (p<0.05) yüksek olduğu gözlendi. Ayrıca bu çalışmada, progesteron düzeyi yüksek (>2.5 ng/ml) olan ineklerden gebelik elde edilemedi. Sonuç olarak, özellikle gözlem yoluyla östrusun davranışsal belirtileri tespit edilemeyen ineklerde östrus tespitindeki hataların önlemesi ve gebelik oranının artırılması amacıyla progesteron test kitleri kullanılabilir. 2015-06-12T13:18:35Z 2015-06-12T13:18:35Z 2007 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Sönmez, M., Türk, G. ve Demirci, E. (2007). İneklerde gebelik oranı üzerine gözlem yöntemi ve progesteron test kitleriyle yapılan östrus tespitinin etkisi. Ankara Üniversitesi Veteriner Fakültesi Dergisi, 54(2), 81-86. http://hdl.handle.net/11508/8029 54 2 81;86 Türkçe Ankara Üniversitesi Veteriner Fakültesi Dergisi

oai:openaccess.firat.edu.tr:11508/80302017-11-30T16:24:27Zcom_11508_11907col_11508_11926

Molecular detection of tick-borne rickettsial and protozoan pathogens in domestic dogs from Turkey Aktas M, Özübek S, İpek Nds, Altay K, Balkaya I, Utuk Ae, Kırbas A, Şimsek S, Dumanlı N Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Dog, Babesia canis canis, Anaplasma platys, Ehrlichia canis, Theileria annulata, RLB Background: Canine tick-borne parasites have emerged in recent years, showing a wider geographic distribution and increased global prevalence. In addition to their veterinary importance, domestic dogs play an important role in the transmission cycles of some agents by acting as reservoirs and sentinels. This study investigated Babesia, Theileria, Anaplasma, and Ehrlichia species in asymptomatic dogs in ten provinces of Turkey. Methods: DNA obtained from blood samples collected from 757 domestic dogs (243 stray, 351 shelter, 163 pet) of both sexes and various ages were evaluated using PCR and reverse line blotting (RLB) assays. Results: Of the 757 dogs tested, 41 (5.4%) were found to be infected with one or more parasites. Ehrlichia canis (37/757, 4.9%) was the most common canine tick-borne pathogen, followed by Anaplasma platys (4/757, 0.5%). Babesia canis and Theileria annulata were each detected in 1 (0.13%) sample. Combined infection of E. canis and A. platys was detected in 2 (0.3%) samples. The prevalence of tick-borne pathogens was higher in adult dogs (6.8%) than in those under one year old (3.1%). Difference in infection rate of male and female dogs was not significant. Pet dogs had a lower prevalence of infection (1.2%) compared to stray (7.4%) and shelter dogs (6%) although the difference between stray and shelter dogs was not significant. Conclusions: Babesia canis, T. annulata, A. platys, and E. canis species were identified at the molecular level in dogs in several provinces of Turkey, with E. canis being the most common species among tick-borne pathogens. Detailed studies should be conducted regarding the existence and prevalence of B. canis and Dermacentor reticulatus in eastern Turkey. 2015-06-12T13:22:53Z 2015-06-12T13:22:53Z 2015 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Aktas M. Özübek S, İpek Nds, Altay K, Balkaya I, Utuk Ae, Kırbas A, Şimsek S, Dumanlı N, (2015). Molecular detection of tick-borne rickettsial and protozoan pathogens in domestic dogs from Turkey. Parasites & Vectors, 8(DOI 10.1186/s13071-015-0763-z), 157-163. http://hdl.handle.net/11508/8030 8 DOI 10.1186/s13071-015-0763-z 157;163 DOI 10.1186/s13071-015-0763-z İngilizce Parasites & Vectors

oai:openaccess.firat.edu.tr:11508/80312017-11-30T16:24:37Zcom_11508_11907col_11508_11914

Effect of inclined thick fin on natural convection in a cavity heated from bottom Varol, Yasin Özgen, Filiz TR25510 Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Doğal Taşınım Kanatçık Kare Geometri In this study, natural convection heat transfer in a square cavity with an adiabatic fin mounted on a vertical wall was investigated numerically. Vertical boundaries were adiabatic and horizontal boundaries were isothermal at different constant temperature. Two-dimensional equations of conservation of mass, momentum and energy were solved using finite difference method. Successive under relaxation (SUR) method was used to solve linear algebraic equations. 2015-06-12T13:54:50Z 2015-06-12T13:54:50Z 2015 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Varol, Y. ve Özgen, F. (2015). Effect of inclined thick fin on natural convection in a cavity heated from bottom. Progress in Computational Fluid Dynamics, 15(1), 47-55. http://hdl.handle.net/11508/8031 15 1 47;55 İngilizce Progress in Computational Fluid Dynamics

oai:openaccess.firat.edu.tr:11508/80322017-11-30T16:24:36Zcom_11508_11907col_11508_11914

Analysis of thermal mixing in circle shaped body inserted inclined channel Kok, Beşir Varol, Yasin Öztop, Hakan F. Koca, Ahmet TR25510 Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Isıl Karışım Paralel Jet Isı Transferi In this study, thermal mixing (TM) phenomena in a rectangle channel with adiabatic circle shaped body are investigated experimentally. Two parallel jets in different temperatures are located in the channel which has a circular exit hole to supply continuity of mass. Experiments are carried out for different inclination angle of the channel. Also, effects of ratio of flow rate, jets diameters, and temperature difference between hot and cold jets were analyzed. A circle shaped passive element with low thermal conductivity is located into channel to control thermal mixing. Thermal mixing index is calculated from measured temperatures. Experimental results showed that thermal mixing of fluid is effected from geometric parameters, drastically. It is found that TM is function of the temperature difference of inlet jets. 2015-06-12T14:02:49Z 2015-06-12T14:02:49Z 2015 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Kok, B., Varol, Y., Öztop, H. ve Koca, A. (2015). Analysis of thermal mixing in circle shaped body inserted inclined channel. Experimental Thermal and Fluid Science, 68(1), 1-10. http://hdl.handle.net/11508/8032 68 1 1;10 10.1016/j.expthermflusci.2015.04.007 İngilizce Experimental Thermal and Fluid Science

oai:openaccess.firat.edu.tr:11508/80332017-11-30T16:24:34Zcom_11508_11709col_11508_11716

Analysis of heat transfer and fluid flow inside conventional and pent-roof type combustion chamber using dynamic mesh model Varol, Yasin Fırat, Müjdat TR25510 Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ İçten Yanmalı Motorlar Yanma Odası In this study, flow and heat transfer were investigated numerically the conventional type and roof type combustion chamber. Dynamic mesh model was used to analyzed in cylinder flow and heat transfer characteristics during intake stroke. k-ε turbulence model was chosen for the solution equations of turbulence. Governing equations were solved with finite volume method and FLUENT-12.0 commercial software. The results were expressed in the inner velocity profile and temperature distribution, and comparison to both type chamber are presented. Heat transfer and flow characteristics of the roof type combustion chamber for better performance than conventional type combustion chamber showed. 2015-06-12T14:13:07Z 2015-06-12T14:13:07Z 2011 Bildiri - Yayımlanmış Varol, Y. ve Fırat, M. (2011). Analysis of heat transfer and fluid flow inside conventional and pent-roof type combustion chamber using dynamic mesh model. 6th Int. Adv. Technologies Symposium (IATS'11). (ss.293-297). Elazığ: (IATS'11). http://hdl.handle.net/11508/8033 293;297 6th Int. Adv. Technologies Symposium (IATS'11) Türkçe Elazığ (IATS'11)

oai:openaccess.firat.edu.tr:11508/80712017-11-30T16:24:33Zcom_11508_11907col_11508_11915

THE FACTORS EFFECT THE EXTERNEL BONDED PATCH REPAİRED IN LAMİNATED COMPOSİTE MATERİALS Tabakalı Kompozit Malzelerde Yapıştırıcı Kullanılarak Yama ile yapılan Tamiri Etkileyen Faktörlerin Araştırılması PIHTILI, Haşim,Şükrü,Çetinkaya, Hayri,Yıldırım TR19255 Fırat Üniversitesi Kütüphanesi::GENEL KONULAR Laminate Composite Materials bonded repair patch adhesive failure strength İn this study, glass and carbon fibres reinforced composite materials have been produced with eight laminates. For experimental study, specimens with 10 mm internal hole were prepared. Then, these specimens have been repaired by using adhesive and composite patches with different parameters in necessary curing temperatures and laboratory conditions. By performing the unidirectional tensile test, the ultimate failure loads of these repaired specimens were indicated. By comparing these ultimate failure loads of repaired specimens that prepared with different parameter, the effects of several repair parameters on the ultimate failure strength are investigated. These repair parameters are patch bonded area (D/W ratio), adhesive thickness, patch thickness and fibres orientation angles (0, 15, 30, 45). FÜBAB Tarafından Desteklenmiştir. 2015-06-17T14:21:25Z 2015-06-17T14:21:25Z 2015-05-18 Makale - Yabancı Dilde Makale Pıhtılı, H. (2015). THE FACTORS EFFECT THE EXTERNEL BONDED PATCH REPAİRED IN LAMİNATED COMPOSİTE MATERİALS Tabakalı Kompozit Malzelerde Yapıştırıcı Kullanılarak Yama ile yapılan Tamiri Etkileyen Faktörlerin Araştırılması ]. 1st International Conference on Engineering and Natural Sciences(ICENS), 1(1), 958-964. http://hdl.handle.net/11508/8071 1 1 958;964 İngilizce 1st International Conference on Engineering and Natural Sciences(ICENS)

oai:openaccess.firat.edu.tr:11508/80342017-11-30T21:21:19Zcom_11508_12039col_11508_12053

Morphological, karyological features and pollen morphology of endemic Psephellus pyrrhoblephara Boiss. from Turkey Tasar, Neslihan Hayta, Şükrü Kıran, Yaşar Bağcı, Eyüp TR24005 TR104024 TR3390 Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Turkish endemic Psephellus pyrrhoblephara Pollen Morphology Karyotype In this study, morphological, morphometrical, karyological and detailed pollen morphology of the endemic Psephellus pyrrhoblephara Boiss. was studied for the first time. In the morphologic study of the plant, some morphological and morphometrical features was observed and compared with the Flora of Turkey records. Karyogram and idiograms of the plant were also prepared. The chromosome number of Psephellus pyrrhoblephara was found as 2n = 30 and haploid karyotype formula 8m + 2sm +5M. Metaphase chromosome length ranging from 2.36 to 1.34 μm and the total haploid chromosome length was 26, 16 μm. The results of the light microscope investigation of the pollen revealed that they have radially symmetrica, iso-polar tricolporate, spheroidal type and exine ornamentation was also determined scabrate. The results were discussed with genus patterns. 2015-06-15T06:34:19Z 2015-06-15T06:34:19Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Tasar, N., Hayta, Ş., Kıran, Y. ve Bağcı, E. (2014). Morphological, karyological features and pollen morphology of endemic Psephellus pyrrhoblephara Boiss. from Turkey. Turkish Journal of Science & Technology, 9(1), 17-21. 1308-9099 http://hdl.handle.net/11508/8034 9 1 17;21 İngilizce Turkish Journal of Science & Technology

oai:openaccess.firat.edu.tr:11508/80352017-11-30T19:56:41Zcom_11508_12039col_11508_12041

Kahramanmaraş ili Torrenticola Piersig, 1896 ve Monatractides K. Viets, 1926 (Acari: Hydrachnidia: Torrenticolidae) türleri ve Türkiye faunası için iki yeni kayıt Esen, Yunus Erman, Orhan TR32090 TR12555 Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Acari Yeni kayıtlar Torrenticolidae Kahramanmaraş Bu çalışmada, Kahramanmaraş ilinden toplanan Torrenticola Piersig, 1896 ve Monatractides K.Viets, 1926 (Acari: Hydrachnidia: Torrenticolidae) türleri değerlendirilmiştir. Torrenticola’dan 3 tür, Monatractides’den 4 tür tespit edilmiştir. Teşhis edilen türlerin tümü Kahramanmaraş’tan ilk defa kaydedilmiştir. Türkiye faunası için yeni kayıt olan Torrenticola (s.str.) ischnophallus Lundblad, 1956 ve Monatractides (s.str.) algeriensis (Lundblad, 1941)’in yapısal özellikleri, şekilleri ve ölçümleri örneklerimiz üzerinden gözden geçirilmiştir. Ayrıca tespit edilen tüm türlerin zoocoğrafik dağılımları verilmiştir. In this study, the species of Torrenticola Piersig, 1896 ve Monatractides K.Viets, 1926 collected from Kahramanmaraş Province were determined. Three species of the genus Torrenticola and four species of the genus Monatractides are reported. All identified species are new records for Kahramanmaraş Province. Torrenticola (s.str.) ischnophallus Lundblad, 1956 and Monatractides (s.str.) algeriensis (Lundblad, 1941) are new records for the Turkish fauna. Their morphological characteristics, drawings and measurements of these two species are re-evaluated. Furthermore, the zoogeographical distributions of all identified species were given. 2015-06-15T07:33:44Z 2015-06-15T07:33:44Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Esen, Y. ve Erman, O. (2014). Kahramanmaraş ili Torrenticola Piersig, 1896 ve Monatractides K. Viets, 1926 (Acari: Hydrachnidia: Torrenticolidae) türleri ve Türkiye faunası için iki yeni kayıt. Fırat Üniversitesi Fen Bilimleri Dergisi, 26(1), 39-44. 1308-9064 http://hdl.handle.net/11508/8035 26 1 39;44 Türkçe Fırat Üniversitesi Fen Bilimleri Dergisi

oai:openaccess.firat.edu.tr:11508/80372017-11-30T21:21:19Zcom_11508_12039col_11508_12053

Zooplankton of Beyhan Dam Lake (Elazığ, Turkey) Bulut, Hilal Saler, Serap TR102062 TR102303 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Zooplankton Rotifera Cladocera Copepoda Beyhan Dam Lake Beyhan Baraj Gölü Seasonal variations of the zooplankton were studied in Beyhan Dam Lake between March 2011 and February 2012. Samples were collected from 2 different stations basis with plankton net, both horizontally and vertically. In Beyhan Dam Lake 32 zooplankton species were identified. Zooplankton samples were consisted of 93.38% Rotifera, 3.99% Cladocera, and %2.63 Copepoda, including 24, 5, and 3 taxa, respectively. Rotifera was the dominant group of zooplankton with respect to species numbers, frequency of occurrence, and density. All of the zooplanktonic species have been detected for the first time in Beyhan Dam Lake with this study. Some chemical and physical parameters as pH, dissolved oxygen, water temperature were also measured during the research. Beyhan Baraj Gölü zooplanktonu’nun mevsimsel değişimi Mart 2011- Şubat 2012 tarihleri arasında incelendi. Zooplankton örnekleri 2 farklı istasyondan plankton ağıyla hem horizontal hemde vertical olarak toplandı. Baraj Gölü’nde toplam 32 zooplankton türü teşhis edildi. Göldeki zooplanktonik organizmaların sayısal (birey/m³) olarak % 93.38’ini Rotifera, % 3.99’nu Cladocera ve % 2.63’ünü Copepoda türlerinin oluşturduğu belirlendi. Rotifera grubundan 24, Cladocera grubundan 5, Copepoda grubundan ise 3 takson bulundu. Rotifera grubu tür sayısı, ortaya çıkış sıklığı ve yoğunluk bakımından zooplankton içinde baskın grubu teşkil etmiştir. Beyhan Baraj Gölü’ndeki tüm zooplanktonik türler ilk kez bu çalışma ile teşhis edildi. Çalışma boyunca pH, çözünmüş oksijen, su sıcaklığı gibi bazı fiziksel ve kimyasal parametreler de ölçüldü. 2015-06-15T07:54:45Z 2015-06-15T07:54:45Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Bulut, H. ve Saler, S. (2014). Zooplankton of Beyhan Dam Lake (Elazığ, Turkey). Turkish Journal of Science & Technology, 9(1), 23-28. 1308-9099 http://hdl.handle.net/11508/8037 9 1 23;28 İngilizce Turkish Journal of Science & Technology

oai:openaccess.firat.edu.tr:11508/80362017-11-30T19:56:50Zcom_11508_12039col_11508_12041

Hazar Gölü (Suluçayır Düzü) epifitik diyatome florası Pala, Güneş TR117377 Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Diyatome Epifitik Hazar Gölü Ranunculus rinoii Ranunculus aquatilis Epiphytic Hazar Lake Hazar Gölü (Suluçayır Düzü)’ nün epifitik diyatome florasını belirlemek amacıyla gölden aylık periyotlarla Eylül 2006-Ağustos 2007 tarihleri arasında Ranunculus rinoii ve Ranunculus aquatilis üzerinden örnekler alınmıştır. Araştırma alanında epifitik diyatome florasına ait Ranunculus rinoii üzerinde 29 takson, Ranunculus aquatilis üzerinde ise 27 takson tespit edilmiştir. Epifitik algler içerisinde Amphora ovalis, Synedra ulna, Cymbella affinis ve Epithemia turgida önemli olmuşlardır. Kasım-Nisan aylarında göl çevresinde her iki makrofite de rastlanılmamıştır. The samples were taken monthly from the lake between September 2006- August 2007 from the surface of Ranunculus rinoii and Ranunculus aquatilis determine the epiphytic diatom flora. There have been 29 taxa on R. rinoii, 27 taxa on R. aquatilis belonging to epiphytic diatom flora in the study area. Amphora ovalis, Synedra ulna, Cymbella affinis and Epithemia turgida were found to be important among the epiphytic algae. Both macrophytes have not been observed around the lake in November and April. 2015-06-15T07:42:58Z 2015-06-15T07:42:58Z 2014 Makale - Bilimsel Dergi Makalesi - Tek Yazarlı Pala, G. (2014). Hazar Gölü (Suluçayır Düzü) epifitik diyatome florası. Fırat Üniversitesi Fen Bilimleri Dergisi, 26(1), 45-51. 1308-9064 http://hdl.handle.net/11508/8036 26 1 45;51 Türkçe Fırat Üniversitesi Fen Bilimleri Dergisi

oai:openaccess.firat.edu.tr:11508/80382017-11-30T21:21:19Zcom_11508_12039col_11508_12053

The determination of some heavy metal and mineral levels in frozen shrimp and frozen squid Canpolat, Özgür Çağlar, Metin TR60720 TR59068 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Frozen shrimp Frozen squid Heavy metals Minerals Elazig Turkey Dondurulmuş karides Dondurulmuş kalamar Ağır metal Mineral madde Elazığ Türkiye In this study, the levels of some heavy metals (copper, iron, zinc, cadmium, cobalt, nickel, lead, mercury and arsenic) and minerals (calcium and magnesium) were determined in three different brands of frozen shrimp and frozen squid samples available in local markets of Elazig (Turkey). Concentrations of elements were determined by Inductively Coupled Plasma (ICP). Only Cu, Fe, Zn, Cd, Ca and Mg were detected in frozen shrimp and frozen squid samples analyzed. Co, Ni, As, Hg and Pb were found to be undetectable levels in all samples. Heavy metal and mineral levels in frozen shrimp were found to be in range of 2.27-5.24 ppm for copper, 1.62-4.62 ppm for iron, 2.12-7.28 ppm for zinc, 0.02-0.09 ppm for cadmium, 1.03-1.98 ppm for calcium and 1.00-1.92 ppm for magnesium. Heavy metals and minerals in frozen squids were found to be in range of 1.22-3.39 ppm for copper, 2.84-6.97 ppm for iron, 2.19-6.29 ppm for zinc, 0.04-0.1 ppm for cadmium, 1.00-1.96 ppm for calcium and 1.01-1.99 ppm for magnesium. These results show that heavy metal levels in the frozen shrimp and frozen squid samples were under the dangerous limits given by WHO and FAO and there is no any risk for public health by consuming. Bu çalışmada, Elazığ (Türkiye)’da yerel marketlerden elde edilen üç farklı firmaya ait dondurulmuş karides ve kalamarda bazı ağır metallerin (bakır, demir, çinko, kadmiyum, kobalt, nikel, kurşun, civa ve arsenik) ve minerallerin (kalsiyum ve magnezyum) düzeyleri İndüktif Eşleşmiş Plazma (ICP) ile belirlenmiştir. Dondurulmuş karides ve kalamarda sadece Cu, Fe, Zn, Cd, Ca ve Mg düzeyleri belirlenirken, bütün örneklerde Co, Ni, As, Hg ve Pb düzeyleri cihazın okuma duyarlılığının altında olduğundan tespit edilememiştir. Dondurulmuş karidesde bazı ağır metallerin ve minerallerin düzeyleri bakır 2.27-5.24 ppm, demir 1.62-4.62 ppm, çinko 2.12-7.28 ppm, kadmiyum 0.02-0.09 ppm, kalsiyum 1.03-1.98 ppm ve magnezyum 1.00-1.92 ppm olarak bulunmuştur. Dondurulmuş kalamarda ise bazı ağır metal ve mineral düzeyleri bakır 1.22-3.39 ppm, demir 2.84-6.97 ppm, çinko 2.19-6.29 ppm, kadmiyum 0.04-0.1 ppm, kalsiyum 1.00-1.96 ppm ve magnezyum 1.01-1.99 ppm olarak belirlenmiştir. Dondurulmuş karides ve kalamar için verilen bu ağır metal düzeylerinin WHO ve FAO tarafından verilen değerlerin altında olduğu ve insanlar tarafından tüketildiğinde sağlık açısından bir risk oluşturmadığı tespit edilmiştir 2015-06-15T08:23:42Z 2015-06-15T08:23:42Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Canpolat, Ö. ve Çağlar, M. (2014). The determination of some heavy metal and mineral levels in frozen shrimp and frozen squid. Turkish Journal of Science & Technology, 9(1), 29-35. 1308-9099 http://hdl.handle.net/11508/8038 9 1 29;35 İngilizce Turkish Journal of Science & Technology

oai:openaccess.firat.edu.tr:11508/80402017-11-30T19:56:42Zcom_11508_12039col_11508_12041

Gökkuşağı alabalığı (Oncorhynchus mykiss Walbaum, 1792)'nda curcuminin bazı antioksidan parametreler üzerine etkisi Yonar, Serpil Mişe Yonar, M. Enis Yöntürk, Yassir TR105532 TR105636 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Gökkuşağı alabalığı Curcumin Oksidatif stres Antioksidan sistem Rainbow trout Oxidative stress Bu çalışmada; curcuminin gökkuşağı alabalığı (Oncorhynchus mykiss)'nda bazı antioksidan parametrelere etkisi incelendi. Curcuminin 10, 20 ve 40 mg/kg yem miktarları 21 gün süreyle balıklara verildi. Deneme sonunda balıklardan karaciğer, böbrek ve dalak örnekleri alındı. Bu dokularda malondialdehit (MDA) ve redükte glutatyon (GSH) düzeyi ile glutatyon peroksidaz (GSH-Px), glutatyon redüktaz (GR) ve glutatyon S-transferaz (GST) enzim aktiviteleri incelendi. Curcumin uygulanan balıklarda MDA düzeyinin düştüğü, GSH-Px, GR ve GST aktiviteleri ile GSH düzeyinin ise arttığı belirlendi (p<0.05). In this study, the effect of curcumin on some antioxidant parameters of rainbow trout (Oncorhynchus mykiss) were examined. The amounts of 10, 20 and 40 mg curcumin for per kg diet were given to fish for 21 days. At the end of this period, liver, kidney and spleen samples were taken from the fish. Malondialdehyde (MDA) and reduce glutathione (GSH) level, glutathione peroxidase (GSH-Px), glutathione reductase (GR) and glutathione S transferase (GST) enzyme activities were investigated in these tissues. It was found that the MDA level decreased, while the GSH-Px, GR and GST enzyme activities and the GSH level increased in the fish applied curcumin (p<0.05). 2015-06-15T10:34:56Z 2015-06-15T10:34:56Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Yonar, S., Yonar, M. ve Yöntürk, Y. (2014). Gökkuşağı alabalığı (Oncorhynchus mykiss Walbaum, 1792)'nda curcuminin bazı antioksidan parametreler üzerine etkisi. Fırat Üniversitesi Fen Bilimleri Dergisi, 26(1), 53-57. 1308-9064 http://hdl.handle.net/11508/8040 26 1 53;57 Türkçe Fırat Üniversitesi Fen Bilimleri Dergisi

oai:openaccess.firat.edu.tr:11508/80392015-06-16T00:00:15Zcom_11508_6101com_11508_6073com_11508_5691com_11508_1col_11508_6127

Özgeçmiş ve yayın listesi Ali, Rişvanlı Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Veteriner özgeçmiş yayın listesi 2015-06-15T08:30:47Z 2015-06-15T08:30:47Z 2015-06-15 http://hdl.handle.net/11508/8039 Türkçe

oai:openaccess.firat.edu.tr:11508/80412017-11-30T19:56:52Zcom_11508_12039col_11508_12041

Karakaya Baraj Gölü Kömürhan Bölgesinden yakalanan bazı balıklarda endohelmintlerin araştırılması Barata, Sibel Dörücü, Mustafa TR2423 TR115576 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Karakaya Baraj Gölü Balık Parazit Endohelmint Parasites Karakaya Dam Lake Fish Bu çalışma, Temmuz 2010 ve Haziran 2011 tarihleri arasında Karakaya Baraj Gölü Kömürhan Bölgesinde yakalanabilen 128 Acanthobrama marmid Heckel, 1843, 121 Cyprinus carpio carpio Linnaeus, 1758, 126 Capoeta trutta (Heckel, 1843), 138 Alburnus mossulensis Heckel, 1843 olmak üzere toplam 513 balık üzerinde yürütüldü. İncelenen balıkların 481’i parazitli bulunup, 4 tür parazite rastlandı. Yapılan otopside Acanthobrama marmid’in vücut boşluğunda Ligula intestinalis, bağırsağında Neoechinorhynchus rutili, göz sıvısında Diplostomum sp. olmak üzere 3 adet parazit türü teşhis edildi. Cyprinus carpio carpio’nun bağırsağında Khawia sinensis, göz sıvısında Diplostomum sp. olmak üzere 2 adet parazit türü teşhis edildi. Capoeta trutta’nın bağırsağında Neoechinorhynchus rutili, göz sıvısında Diplostomum sp. olmak üzere 2 adet parazit türü teşhis edildi. Alburnus mossulensis’in bağırsağında Neoechinorhynchus rutili, göz sıvısında Diplostomum sp. olmak üzere 2 adet parazit türü teşhis edildi. This study was carried out on a total of 513 fish; 128 Acanthobrama marmid Heckel, 1843, 121 Cyprinus carpio carpio Linnaeus, 1758, 126 Capoeta trutta (Heckel, 1843), 138 Alburnus mossulensis Heckel, 1843 caught in Kömürhan Region of Karakaya Dam Lake between July 2010 and June 2011.Four parasite species were encountered in 481 infested fish. After autopsy, 3 parasite species, Ligula intestinalis, Neoechinorhynchus rutili and Diplostomum sp. were found in body cavity, intestine and eyes of Acanthobrama marmid respectively. Khawia sinensis and Diplostomum sp were found in intestine and in eyes of Cyprinus carpio carpio respectively. Again, Neoechinorhynchus rutili and Diplostomum sp. were found in intestine and in eyes of Capoeta trutta respectively. Neoechinorhynchus rutili and Diplostomum sp. were also found in intestine and in eyes of Alburnus mossulensis respectively. 2015-06-15T10:45:32Z 2015-06-15T10:45:32Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Barata, S. ve Dörücü, M. (2014). Karakaya Baraj Gölü Kömürhan Bölgesinden yakalanan bazı balıklarda endohelmintlerin araştırılması. Fırat Üniversitesi Fen Bilimleri Dergisi, 26(1), 59-68. 1308-9064 http://hdl.handle.net/11508/8041 26 1 59;68 Türkçe Fırat Üniversitesi Fen Bilimleri Dergisi

oai:openaccess.firat.edu.tr:11508/80422017-11-30T19:56:53Zcom_11508_12039col_11508_12041

Vicia koeieana’ nın karyolojik ve palinolojik yönden araştırılması Kıran, Yaşar Gedik, Osman Şahin, Ahmet Gür, Nazmi TR104024 TR1587 TR59232 Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Vicia L. Karyotip Polen morfolojisi Karyotype Pollen morphology Vicia L. cinsinin (Fabaceae) Anatropostylia seksiyonunun tek türü olan Vicia koeieana karyolojik ve palinolojik yönden araştırıldı. Bitki örneği (Vicia koeieana Rech. f.) 2012 yılında doğal habitatından toplandı. Çalışılan türün temel kromozom sayısı 2n=14 olarak bulundu. Türe ait kromozomların median (m) ve submedian (sm) sentromerli olduğu gözlendi. Palinolojik çalışmalarda polen şekli prolat, apertürleri trikolparat ve ornemantasyonu ise retikulat olduğu tespit edilerek ölçümleri yapıldı. Karyological and palynological were investigated on single species Vicia koeieana of the Anatropostylia section of the Vicia L. genus. Sample plant of V. koeieana were collected from natural habitats in 2012. The basic chromosome number was observed to be 2n=14. Chromosomes had median region (m) and submedian (sm) centromers. The results of investigation of the palynological revealed that the pollen type prolate, apertures tricolporate and ornamentation is reticulate and they were measured. 2015-06-15T10:55:16Z 2015-06-15T10:55:16Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Kıran, Y., Gedik, O., Şahin, A. ve Gür, N. (2014). Vicia koeieana’ nın karyolojik ve palinolojik yönden araştırılması. Fırat Üniversitesi Fen Bilimleri Dergisi, 26(1), 69-71. 1308-9064 http://hdl.handle.net/11508/8042 26 1 69;71 Türkçe Fırat Üniversitesi Fen Bilimleri Dergisi

oai:openaccess.firat.edu.tr:11508/80432017-11-30T19:56:49Zcom_11508_12039col_11508_12041

Elazığ ve çevresindeki sismik aktivitelerin deprem parametreleri ilişkisinin incelenmesi Doğaner, Adem Çalık, Sinan TR59764 TR60056 Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Deprem parametreleri Doğu Anadolu fay zonu Earthquake parameters East Anatolian fault zone Çalışmada deprem parametreleri arasındaki ilişki istatistiksel olarak incelenmiştir. Bu parametreler deprem odak derinlikleri, deprem dış merkezleri, deprem magnitüdleri ve depremler arası süre olarak belirlenmiştir. Uygulama alanı olarak merkezi Elazığ olan 100 km yarıçaplı alandaki depremler seçilmiştir. Veri seti olarak bu bölgede 1900 ile 2010 yılları arasında gerçekleşen depremler çalışma kapsamına alınmıştır. Elde edilen sonuçlara göre depremlerin odak derinlikleri ile depremler arasındaki süre parametreleri arasındaki ilişki istatistiksel olarak anlamlı bulunmuştur (p<0.05). Deprem odak derinliklerinin depremler arası süreleri etkilediği tespit edilmiştir. In this study, relationship of earthquake parameters were statistically analyzed. This parameters were determined as a hypocenter, epicenter, magnitude and times of between earthquakes. Radius 100 km from center of Elazig were determined as a application area. The data set, earthquakes in this area took place between 1900 and 2010 were included in the study. As a result, relationship of between earthquake hypocenter and times of between earthquakes were statistically found significant (p<0.05). Times of between earthquakes were affected by hypocenter. 2015-06-15T11:12:24Z 2015-06-15T11:12:24Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Doğaner, A. ve Çalık, S. (2014). Elazığ ve çevresindeki sismik aktivitelerin deprem parametreleri ilişkisinin incelenmesi. Fırat Üniversitesi Fen Bilimleri Dergisi, 26(1), 73-77. 1308-9064 http://hdl.handle.net/11508/8043 26 1 73;77 Türkçe Fırat Üniversitesi Fen Bilimleri Dergisi

oai:openaccess.firat.edu.tr:11508/80452017-11-30T21:21:18Zcom_11508_12039col_11508_12053

Distribution of some heavy metals in muscle tissues of Luciobarbus xanthopterus Düşükcan, Mustafa Eroğlu, Mücahit Canpolat, Özgür Çoban, Mehmet Zülfü Çalta, Metin Şen, Dursun TR59379 TR59191 TR60720 TR117128 TR31978 TR2220 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Transfer factor Heavy metals Muscle Luciobarbus xanthopterus Transfer faktörü Ağır metal Kas In this study, the concentration of some heavy metals (Cu, Fe, Zn, Cr, Cd, Co and Pb) were determined in water and in the muscle of Luciobarbus xanthopterus fish to study the potential human risk of consumption and the relationship between the heavy metal load of fish and some of their biological aspects (weight, lenght and sex) and seasonal variation. Transfer Factors of heavy metals in L. xanthopterus were also determined. It was found that heavy metals accumulated in muscle tissue of L. xanthopterus were higher than that in the water. The concentration of heavy metals showed differences according to weight, length and sex of fish. The metal concentrations were determined in muscle tissue of female higher than those in male fish. The results were discussed and compared with tolerable values for heavy metals provided from the EPA, WHO, FAO and Turkish Food Codex (TFC) to determine whether this species has any risk for human consumption. Bu çalışmada, bazı ağır metallerin (Cu, Fe, Zn, Cr, Cd, Co and Pb) su ve Luciobarbus xanthopterus’un kas dokusundaki konsantrasyonları, bu balığın insanlar tarafından tüketilmesinde bir risk oluşturup oluşturmadığı ve balıkta ağır metal birikimi ile balığın bazı biyolojik özellikleri (ağırlık, uzunluk ve cinsiyet) arasındaki ilişki belirlenmiştir. Ayrıca, L. xanthopterus’da ağır metallerin Transfer Faktörü belirlenmiştir. L. xanthopterus’un kas dokusunda biriken ağır metallerin konsantrasyonu sudan daha yüksek bulunmuştur. Ağır metal birikimlerinin balığın vücut ağırlığına, uzunluğuna ve cinsiyetine bağlı olarak değişiklik gösterdiği görülmüştür. Dişi balıkların kas dokusundaki metal konsantrasyonlarının erkek balıklardan daha yüksek olduğu tespit edilmiştir. Bu türün insanlar tarafından tüketilmesinin herhangi bir risk taşıyıp taşımadığı EPA, WHO, FAO ve Türk Gıda Kodeksi tarafından önerilen kabul edilebilir değerler ile karşılaştırılarak tartışılmıştır. 2015-06-15T11:36:03Z 2015-06-15T11:36:03Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Düşükcan, M., Eroğlu, M., Canpolat, Ö., Çoban, M., Çalta, M. ve diğerleri. (2014). Distribution of some heavy metals in muscle tissues of Luciobarbus xanthopterus. Turkish Journal of Science & Technology, 9(1), 37-46. 1308-9099 http://hdl.handle.net/11508/8045 9 1 37;46 İngilizce Turkish Journal of Science & Technology

oai:openaccess.firat.edu.tr:11508/80442017-11-30T19:56:48Zcom_11508_12039col_11508_12041

Çalgan Deresi (Elazığ) zooplanktonu Baysal, Nesrin Saler, Serap TR102303 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Zooplankton Tür çeşitliliği Çalgan Deresi Species diversity Bolluk Çalgan Deresi zooplanktonunu tespit etmek amacıyla Temmuz 2010 ve Haziran 2011 tarihleri arasında her ay düzenli olarak 3 istasyondan zooplankton örnekleri alınmıştır. Araştırma sonucunda, Rotifera’dan 20 tür, Cladocera’dan 6 tür, Copepoda’dan 1 tür olmak üzere toplam 27 tür teşhis edilmiştir. Kış ayları zooplankton tür çeşitliliğinde belirli bir azalmanın kaydedildiği dönem olmuştur. Bu bulgunun aksine ilkbahar ve yaz aylarında zooplankton tür çeşitliliğinde artışlar kaydedilmiştir K.cochlearis, E.dilatata, A.saltans, P.dolichoptera, S.pectinata, T.capucina türleri bu dönemde en çok kaydedilen türlerdir. Çalgan Deresi’nde tespit edilen organizma sayılarına dayanılarak elde edilen Shannon Wiever indeks (H’) sonuçlarına göre tür zenginliğinin en yüksek olduğu ay temmuz ayı (H’= 1,83), en düşük olduğu ay ise aralık ayı (H’= 0,33) olarak kaydedilmiştir. As to determine the zooplankton of Çalgan Stream, samples were monthly taken between July 2010 and June 2011 from 3 stations. Totally 27 zooplankton species belong to 20 species from Rotifera, 6 species from Cladocera and 1 species from Copepoda were recorded. In winter months a certain decline in zooplankton species diversity has been recorded. Contrary to this finding, increases were recorded in the spring and summer months. K.cochlearis, E.dilatata, A.saltans, P.dolichoptera, S.pectinata, T.capucina were among the most recorded species during this period. According to Shannon Wiener index (H’) based on the number of zooplankton individuals, the highest value was recorded in july (H’= 1.83) and the lowest value was recorded in december (H’= 0.33). 2015-06-15T11:27:24Z 2015-06-15T11:27:24Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Baysal, N. ve Saler, S. (2014). Çalgan Deresi (Elazığ) zooplanktonu. Fırat Üniversitesi Fen Bilimleri Dergisi, 26(1), 1-7. 1308-9064 http://hdl.handle.net/11508/8044 26 1 1;7 Türkçe Fırat Üniversitesi Fen Bilimleri Dergisi

oai:openaccess.firat.edu.tr:11508/80462017-11-30T21:21:18Zcom_11508_12039col_11508_12053

Development of robust fuzzy control methods and their applications to a mechanical system Koca, Gonca Özmen Akpolat, Zühtü Hakan Özdemir, Mehmet TR59055 TR2458 TR60417 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Four-bar linkage system Four-bar mechanism Fuzzy logic Non-singleton Sliding mode control Dört-kol mekanizması Bulanık mantık Kayma kipli control In this study, a non-singleton fuzzy sliding control based strategies are investigated with simulation and also experimental studies in order to minimize angular velocity ripples of the nonlinear four-bar mechanism when it is driven by an electric motor. The mathematical model of the full system included the motor and four-bar mechanism is first obtained and open loop reply of the system is illustrated to show angular velocity ripples of the crank in the presence of the constant potential source. Secondly, an optimized PID controller by using pattern search is designed to reduce crank angular velocity ripples for the closed loop system. A new non-singleton type-1 fuzzy sliding controller is designed in order to obtain stable crank angular velocity in the steady state and performances of different types of fuzzy sliding controllers are comparatively illustrated. In addition to simulation results, experimental results of the controlled systems are also presented in order to show the effectiveness of the controllers in practice. As far as the industrial applications are concerned, simpler and more practical control algorithm is obtained with non-singleton type-1 fuzzy sliding control structure. Bu çalışmada, bir elektrik motoruyla sürülen doğrusal olmayan dört-kol mekanizmasının açısal hız dalgalanmalarını minimuma indirgemek için non-singleton bulanık kayma kipli bir kontrol uygulaması benzetim ve deneysel çalışmalarla gerçekleştirilmiştir. Öncelikle, motor ve dört-kol mekanizmasını içeren bütün sistemin matematiksel modeli çıkarılmış ve sabit kaynak gerilimi uygulandığında krank açısal hızındaki dalgalanmaları göstermek için sistemin açık çevrim cevabı sunulmuştur. İkinci olarak, kapalı çevrim sistem için karank açısal hızındaki dalgalanmaları azaltacak bir optimum PID kontrolör gerçekleştirilmiştir. Kalıcı durumda krank açısal hızını sabitlemek için yeni bir non-singleton tip-1 bulanık kayma kipli kontrolör tasarlanmıştır ve farklı tip bulanık kayma kipli kontrolörlerin performansları karşılaştırılmalı olarak gösterilmiştir. Benzetim sonuçlarına ek olarak pratikte önerilen kontrolörlerin etkinliğini göstermek için kontrol edilen sistemlerin deneysel sonuçları da sunulmuştur. Endüstriyel uygulamalar göz önünde bulundurulduğunda, non-singleton tip-1 bulanık kayma kipli kontrol yapısının daha basit ve pratik olduğu sonucuna varılmıştır 2015-06-15T12:21:01Z 2015-06-15T12:21:01Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Koca, G., Akpolat, Z. ve Özdemir, M. (2014). Development of robust fuzzy control methods and their applications to a mechanical system. Turkish Journal of Science & Technology, 9(1), 47-56. 1308-9099 http://hdl.handle.net/11508/8046 9 1 47;56 İngilizce Turkish Journal of Science & Technology

oai:openaccess.firat.edu.tr:11508/80472017-11-30T21:21:18Zcom_11508_12039col_11508_12053

The effect of SBS and wax modification on stability and stiffness of stone mastic asphalt Kök, Baha Vural Yılmaz, Mehmet Akpolat, Mustafa TR110514 TR101044 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Hot bituminous mixture SBS Sasobit Stability Stiffness Sıcak bitümlü karışım Stabilite Rijitlik Increasing traffic load and flow make the additive usage and new gradation quests necessary for more quality roads. In this respect using polymer additives and stone mastic asphalt are presented as a solution. However the need for using hard and polymer modified binders in stone mastic asphalt mixtures reduces workability and elevates the costs considerably. In this study the effects of using styrene-butadiene-styrene (SBS) and Sasobit both separately and together in the hot mixtures were evaluated. B 50/70 base bitumen and limestone aggregate were used for preparing the mixtures. Marshall stability and indirect tensile stiffness modulus test were applied to the mixtures prepared by base and modified binders. The Marshall test were carried out for both unconditioned and conditioned samples and hence retained Marshall stabilities was also determined. Stiffness modules were determined at three different temperatures. SBS and Sasobit together in the same mixture significantly improves stability and stiffness of the mixtures compared to containing only SBS and Sasobit. Sasobit modification increases the effectiveness of the SBS modification with respect to mechanical properties except moisture resistance. Artan trafik yükleri ve miktarı daha sağlam yollar için katkı kullanımını ve yeni gradasyon arayışlarını gerektirmiştir. Bu bağlamda polimer katkılarının kullanımı ve taş mastik asfalt bir çözüm olarak sunulmaktadır. Fakat taş mastik asfaltlarda sert ve polimer modifiyeli bağlayıcı kullanılması gerekliliği işlenebilirliği azaltmakta ve maliyetleri artırmaktadır. Bu çalışmada sıcak karışım içinde styrene-butadiene-styrene (SBS) ve Sasobitin hem ayrı hem de birlikte kullanılmalarının etkileri incelenmiştir. Karışımların hazırlanmasında B 50/70 bitümü ve kireç taşı agrega kullanılmıştır. Katkısız ve polimer modifiyeli karışımlara Marshall stabilite ve indirek çekme rijitlik modülü deneyleri uygulanmıştır. Marshall testi hem koşullu hem de koşulsuz numunelere uygulanarak kalıcı Marshall stabiliteleri de tespit edilmiştir. Rijitlik modülü üç farklı sıcaklıkta belirlenmiştir. Aynı karışım içinde SBS ve Sasobitin birlikte kullanılması stabilite ve rijitliği ayrı kullanılmalarına göre önemli derecede iyileştirmiştir. Nem hassasiyeti dışında mekanik özellikler açısından Sasobit, SBS katkısının etkinliğini artırmıştır. 2015-06-15T12:44:06Z 2015-06-15T12:44:06Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Kök, B., Yılmaz, M. ve Akpolat, M. (2014). The effect of SBS and wax modification on stability and stiffness of stone mastic asphalt. Turkish Journal of Science & Technology, 9(1), 56-72. 1308-9099 http://hdl.handle.net/11508/8047 9 1 56;72 İngilizce Turkish Journal of Science & Technology

oai:openaccess.firat.edu.tr:11508/80482017-11-30T19:56:49Zcom_11508_12039col_11508_12041

Centaurea L. Cinsine ait 4 taksonun morfolojik ve anatomik yönden araştırılması Taşar, Neslihan Gedik, Osman Kıran, Yaşar TR215187 TR104024 Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Centaurea Morfoloji Anatomi Bu çalışmada, Centaurea L. cinsine ait 4 tür (C. aggregata subsp. aggregata, C. virgata, C. balsamita, C. behen,) morfolojik ve anatomik özellikleri bakımından incelenmiştir. Her bir lokaliteden toplanan bazı örneklerin morfolojik yapıları incelenmiş ve ölçümleri yapılmıştır. Türlerin anatomik özellikleri kök, gövde ve yapraktan alınan kesitlerle belirlenmiştir. Çalışılan türlerin anatomik yapı olarak Centaurea L. cinsine ait diğer türlerden belirgin bir farklılık göstermediği bulunmuştur. In this study, morphological and anatomical characteristics of 4 species belonging to Centaurea L. ( Centaurea aggregata subsp. aggregata, Centaurea virgata, Centaurea balsamita, Centaurea behen,) were investigated. Morphological structures of the samples collected from each locality were measured and analysed. Anatomical characteristics of the species were determined by sections taken from root, stem, leaf and showed no prominent differences from other species belong to Centaurea genus. 2015-06-15T13:18:56Z 2015-06-15T13:18:56Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Taşar, N., Gedik, O. ve Kıran, Y. (2014). Centaurea L. Cinsine ait 4 taksonun morfolojik ve anatomik yönden araştırılması. Fırat Üniversitesi Fen Bilimleri Dergisi, 26(1), 79-87. 1308-9064 http://hdl.handle.net/11508/8048 26 1 79;87 Türkçe Fırat Üniversitesi Fen Bilimleri Dergisi

oai:openaccess.firat.edu.tr:11508/80492017-11-30T21:21:12Zcom_11508_12039col_11508_12053

A transistor based fast driving circuit for bipolar step motor driving Salihmuhsin, Metin Baba, Sabit Yılmaz, Ahmet Serdar Şekkeli, Mustafa Dizibüyük, Alper TR159698 TR32799 TR28988 TR31062 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Bipolar step motor Transistor based driving circuit Bipolar adım motoru Transistör tabanlı sürücü devresi This work involves developing a transistor based driving circuit for a bipolar step motor. TIP41 and TIP42 transistors are used to construct the driving circuit. The control circuit is constructed based on PIC 18F452 microcontroller. The overall system is first tested in simulation using Proteus program and then implemented experimentally on the breadboard. Experimental results showed that the driving circuit successfully runs the bipolar step motor in both directions and at various speeds. Bu çalışma bipolar adım motorları için transistör tabanlı ve hızlı bir sürücü devre tasarımı geliştirilmesi aşamalarını içermektedir. Sürücü devresi TIP41C ve TIP42C transistörleri kullanılarak geliştirilmiştir. Kontrol devresi PIC 18F452 mikrodenetleyicisi kullanılarak gerçeklenmiştir. Sistemin tamamı önce bilgisayar ortamında Proteus programı kullanılarak simule edilmiş daha sonra ise bord üzerinde kurularak gerçeklenmiştir. Deneysel sonuçlar sürücü devresinin biplar adım motorunu her iki yönde ve farklı hızlarda başarılı bir şekilde çalıştırdığını göstermiştir. 2015-06-15T13:21:45Z 2015-06-15T13:21:45Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Salihmuhsin, M., Baba, S., Yılmaz, A., Şekkeli, M. ve Dizibüyük, A. (2014). A transistor based fast driving circuit for bipolar step motor driving. Turkish Journal of Science & Technology, 9(1), 63-66. 1308-9099 http://hdl.handle.net/11508/8049 9 1 63;66 İngilizce Turkish Journal of Science & Technology

oai:openaccess.firat.edu.tr:11508/80502017-11-30T19:56:53Zcom_11508_12039col_11508_12041

CoNiAlSn manyetik şekil hatırlamalı alaşımının üretilmesi ve bazı fiziksel özelliklerinin incelenmesi Yıldız, Köksal Kök, Mediha Dağdelen, Fethi TR41636 TR20961 TR39702 Fırat Üniversitesi Kütüphanesi::DOĞA BİLİMLERİ VE MATEMATİK Şekil hatırlamalı alaşım Manyetik özellik Dönüşüm sıcaklığı Curie sıcaklığı Shape memory alloy Magnetic property Transformation temperature Curie temperature Bu çalışmada, arc-melter yöntemiyle üretilen ferromanyetik Co38Ni33Al27Sn2 şekil hatırlamalı alaşımının bazı fiziksel özellikleri incelendi. 1200 oC’de 24 saat ısıl işleme tabi tutularak homojenize edilen alaşım oda sıcaklığında martensit fazda olması için 1350 oC’de 4 saat yaşlandırıldı. Yaşlandırılan alaşımın martensit dönüşüm başlangıç sıcaklığı, DSC eğrisi alınarak, Ms=98,7 oC olarak tespit edildi. Termogravimetrik ölçüm yöntemi kullanılarak alaşımın manyetik faz dönüşüm sıcaklığı olan Curie sıcaklığı (Tc) 124,69 oC olarak belirlendi. Alaşımın morfolojik ve kristaloğrafik özellikleri, yüzey görüntüsü ve XRD deseni alınarak araştırıldı. Elde edilen sonuçlar, 1350 oC’de gerçekleştirilen ısıl işlemin neticesinde, alaşımda β→βʹ martensit faz dönüşümünün meydana geldiğini ve alaşımın mikroyapısının martensit βʹ fazı, çökelti fazı olan fcc γ fazı ve austenit β fazlarını içerdiğini gösterdi. Oda sıcaklığında alınan manyetik ölçüm, alaşımın dış manyetik alanın etkisinde dar bir histerezis sergilediğini ve yaklaşık 60 Oe olan koerzivite değeri ile de yumuşak manyetik özellik gösterdiğini ortaya koydu. In this study, some physical properties of Co38Ni33Al27Sn2 shape memory alloys, which was produced by arc melter method, were investigated. Heat treated alloys at 1200 oC for 24 hour was annealed at 1350 oC for 4 hour to become in martensite phase at room temperature. Martensite start transformation temperature of annealed alloy was determined as Ms=98.7 oC via DSC curve. Magnetic phase tranformation temperature named as Curie temperature (Tc) of alloy was measured to 124.69 oC by Thermogravimetric Analysis method. Morphological and crystalografic properties of alloy were investigated by obtaining XRD pattern and surface image. As a result of 1350 oC heat treated, the obtained results showed that β→βʹ martensite phase transition was occurred and the microstructure of alloy contained with βʹ martensite phase, fcc γ precipitate phase and austenite β phase. The magnetic propety measurement was exhibited that alloy had narrow hysteresis and soft magnetic propery with 60 Oe coersivity value at room temperature. 2015-06-15T13:32:16Z 2015-06-15T13:32:16Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Yıldız, K., Kök, M. ve Dağdelen, F. (2014). CoNiAlSn manyetik şekil hatırlamalı alaşımının üretilmesi ve bazı fiziksel özelliklerinin incelenmesi. Fırat Üniversitesi Fen Bilimleri Dergisi, 26(2), 89-93. 1308-9064 http://hdl.handle.net/11508/8050 26 2 89;93 Türkçe Fırat Üniversitesi Fen Bilimleri Dergisi

oai:openaccess.firat.edu.tr:11508/80512017-11-30T19:56:48Zcom_11508_12039col_11508_12041

Keban ve Karakaya Baraj Gölleri’nde yaşayan Barbus grypus Heckel, 1843 populasyonlarında karşılaştırmalı yaş tayini Düşükcan, Mustafa Çalta, Metin TR59379 TR31978 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Barbus grypus Keban Baraj Gölü Karakaya Baraj Gölü Yaş tayini Bu çalışmada, Keban ve Karakaya Baraj Gölleri’nde yaşayan Barbus grypus Heckel, 1843 populasyonlarında karşılaştırmalı yaş tayini yapıldı. Bu amaçla Ocak-Aralık 2010 tarihleri arasında Keban Baraj Gölü’nden 90, Karakaya Baraj Gölü’nden ise 89 adet olmak üzere toplam 179 balık temin edildi. Balıkların boy ve ağırlıkları belirlendi. Yaş tayininde kullanılan dorsal yüzgeç ışını, omur, pul, sol otolit, sağ otolit, sol operkulum ve sağ operkulum kemiksi yapıları çıkartılarak, temizlendi ve etiketlendi. Bu kemiksi yapılar binoküler mikroskop altında incelendi. Her bir kemiksi yapıdaki yaş halkaları üç kez ve bir gün arayla sayıldı. Her iki baraj gölünden elde edilen balıkların kemiksi yapılarda, en fazla uyum sol otolit-sağ otolit; en az uyum ise pul-sağ operkulum arasında bulundu. Kemiksi yapılardaki yaş farkı en fazla 3 olarak bulundu. Üç tekrarlı olarak yapılan okumada en yüksek uyumun dorsal yüzgeç ışınında olduğu görüldü. Dorsal yüzgeç ışınına ait tüm okumalardan hesaplanan standart sapma değeri tüm diğer kemiksi yapılarınkine göre düşük bulundu. Ayrıca, dorsal yüzgeç ışınına ait tüm okumalardan elde edilen ortalama değerin, tüm kemiksi yapılara ait okumalardan elde edilen genel ortalama değerden farkı da diğer kemiksi yapılara göre daha küçük bulundu. Bu nedenlerden dolayı B. grypus için yaş tayininde en uygun kemiksi yapının dorsal yüzgeç ışını olduğu sonucuna varıldı. In this study, comparative age determination in Barbus grypus Heckel, 1843 populations from Keban and Karakaya Dam Lakes was made. For this purpose, 179 fish samples (90 from Keban Dam Lake and 89 from Karakaya Dam Lake) were obtained between January and December 2010. Length and weight of them were determined. Dorsal fin rays, vertebrae, scale, left and right otoliths, left and right operculum which were used for age determination were removed, cleaned and labeled. These bony structures were examined under the binocular microscope. Age rings on the each bony structure were counted three times with an interval of one day. In all bony structures, the more compliance was found between the left and right otoliths, and the least compliance was found between scale and right operculum in fish from both dam lakes. Maximum age difference amongst compared bony structures was found as 3. The highest compliance in age reading with three replicates was observed on dorsal fin ray. The standard deviation value calculated from all readings belong to dorsal fin ray was found lower than that of all other bony structures. In addition, the difference of mean value obtained from all readings belong to dorsal fin ray from all readings belong to the all bony structures was found smaller than that of the other bony structures. For this reasons, it was concluded that dorsal fin ray was the most suitable bony structure for age determination in B. grypus. 2015-06-15T13:42:29Z 2015-06-15T13:42:29Z 2014 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Düşükcan, M. ve Çalta, M. (2014). Keban ve Karakaya Baraj Gölleri’nde yaşayan Barbus grypus Heckel, 1843 populasyonlarında karşılaştırmalı yaş tayini. Fırat Üniversitesi Fen Bilimleri Dergisi, 26(2), 95-103. 1308-9064 http://hdl.handle.net/11508/8051 26 2 95;103 Türkçe Fırat Üniversitesi Fen Bilimleri Dergisi

oai:openaccess.firat.edu.tr:11508/80522017-11-30T16:24:27Zcom_11508_11907col_11508_11914

"Improvement of Mechanical Properties of Reinforcing Steel Used in the Reinforced Concrete Structures" Keleştemur, Oğuzhan Keleştemur, M. Halidun Yıldız, Servet TR58964 TR52490 TR12078 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Dual-phase steel Reinforcing steel Tempering treatment Mechanical properties SAEIOIO structural carbon steel, which has a low cost price and wide range of use in the construction industry, has been studied as dual phase (DP) steel subjected to appropriate heat treatment, and its mechanical properties have been investigated under various tempering conditions. Intercritical annealing heat treatment has been applied to the reinforcing steel in order to obtain DP steels with different martensite volume fraction. In addition, these DP steels have been tempered at 200, 300 and 400 'C for 45 min and then cooled to the room temperature. Mechanical properties such as tensile strength, yield strength, reduction in cross-sectional area, total elongation, resilience modulus and toughness have been examined. Furthermore, fractographic examination has been done with scanning electron microscope (SEM) as well as metallographic examination of the steels. As a result of this study, it is found that mechanical properties of DP steel have changed according to the hardness and ratio of martensite phase. In addition, tensile strength, yield strength and resilience modulus of the steels have been reduced. In contrast, the total elongation, reduction of the cross-sectional area and toughness have been increased. 2015-06-16T08:22:39Z 2015-06-16T08:22:39Z 2009 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Keleştemur, O., Keleştemur, M. ve Yıldız, S. (2009). mprovement of Mechanical Properties of Reinforcing Steel Used in the Reinforced Concrete Structures". Journal of Iron and Steel Research, International, 16(3), 55-63. http://hdl.handle.net/11508/8052 16 3 55;63 İngilizce Journal of Iron and Steel Research, International

oai:openaccess.firat.edu.tr:11508/80532017-11-30T16:24:38Zcom_11508_11709col_11508_11739

THE EFFECT OF BODY FAT PERCENTAGE OF FEMALE BADMINTON PLAYERS BALANCE ABILITY AND ANAEROBIC POWER Karaman, Muhammed Emre Fırat Üniversitesi Kütüphanesi::GENEL KONULAR Badminton, body fat percentage, anaerobic power, balance ability. As an important future of motoric abilities in sporting performance and daily life balance ability is simply defined as the provision of the body center of gravity within the specified limits. Based on our study of these ideas ; we aimed to investigate the relationship between body fat percentage,balance ability and anaerobic power values of female badminton players.40 female badminton players aged 16-18 are participated in this research from Çankırı Karatekin University Sports Club. Measurement in research (body fat percentage, anaerobic power, balance ability) were applied to all athletes. The obtained data were evaluated by statistical package program, body fat percentage, average balance ability and anaerobic power values of athletes was compared p <0.05 significance level. When balance ability and anaerobic power values analized with a high body fat percentage of athletes, the balance ability values of high body fat percentage was found to be lower than the athletes with normal and low body fat percentage. However anaerobic power and body fat percentage were not significant differences between the values.As a result, a high percentage of body fat has been observed that occurred a negative impact on the ability to balance. 2015-06-16T08:48:08Z 2015-06-16T08:48:08Z 2015-05-05 Bildiri - Yayımlanmış Karaman, M. (2015). THE EFFECT OF BODY FAT PERCENTAGE OF FEMALE BADMINTON PLAYERS BALANCE ABILITY AND ANAEROBIC POWER. Proceedings of International Academic Conferences. (ss.527-527). Italya / Roma: International Institute of Social and Economic Sciences. http://hdl.handle.net/11508/8053 527;527 Proceedings of International Academic Conferences İngilizce Italya / Roma International Institute of Social and Economic Sciences

oai:openaccess.firat.edu.tr:11508/80542017-11-30T16:24:22Zcom_11508_11907col_11508_11914

Corrosion Behavior of Reinforcing Steel Embedded in Concrete Produced with Finely Ground Pumice and Silica Fume Keleştemur, Oğuzhan Demirel, Bahar TR58964 TR60338 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Concrete Corrosion Finely ground pumice Silica fume Reinforcing steel In this study, the mechanical and physical properties of concrete specimens obtained by substituting cement with finely ground pumice (FGP) at proportions of 5%, 10%, 15% and 20% by weight has been investigated, in addition to analyzing the corrosion behavior of reinforcing steels embedded in these specimens. Besides, with the purpose of determining the effect of silica fume (SF) additive over the corrosion of reinforcing steels embedded in concrete with FGP, SF has been entrained to all series with the exception of the control specimen, such that it would replace with cement 10% by weight. Corrosion experiments were conducted in two stages. In the first stage, the corrosion potential of reinforcing steels embedded in the concrete specimens was measured every day for a period of 160 days based on the ASTM C 876 standard. In the second stage, the anodic and cathodic polarization values of the steels were obtained and subsequently the corrosion currents were determined with the aid of cathodic polarization curves. In the study, it was observed that a decrease in the mechanical strength of the specimens and an increase in the corrosion rate of the reinforcing steel had taken place as a result of the FGP addition. However, it was determined that with the addition of SF into concretes supplemented with FGP, the corrosion rate of the reinforcing steel has significantly decreased. 2015-06-16T11:59:53Z 2015-06-16T11:59:53Z 2010-01-01 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Keleştemur, O. ve Demirel, B. (2010). Corrosion Behavior of Reinforcing Steel Embedded in Concrete Produced with Finely Ground Pumice and Silica Fume. Construction and Building Materials, 24(10), 1898-1905. http://hdl.handle.net/11508/8054 24 10 1898;1905 İngilizce Construction and Building Materials

oai:openaccess.firat.edu.tr:11508/80552017-11-30T16:24:39Zcom_11508_11907col_11508_11914

Effect of Elevated Temperature on the Mechanical Properties of Concrete Produced with Finely Ground Pumice and Silica Fume Demirel, Bahar Keleştemur, Oğuzhan Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Concrete Elevated temperature Finely ground pumice Silica fume C-S-G gel This study investigated the effect of elevated temperature on the mechanical and physical properties of concrete specimens obtained by substituting cement with finely ground pumice (FGP) at proportions of 5%, 10%, 15% and 20% by weight. To determine the effect of silica fume (SF) additive on the mechanical and physical properties of concrete containing FGP, SF has been added to all series except for the control specimen, which contained 10% cement by weight instead. The specimens were heated in an electric furnace up to 400, 600 and 800 1C and kept at these temperatures for one hour. After the specimens were cooled in the furnace, ultrasonic pulse velocity (UPV), compressive strength and weight loss values were determined. The results demonstrated that adding the mineral admixtures to concrete decreased both unit weight and compressive strength. Additionally, elevating the temperature above 600 1C affected the compressive strength such that the weight loss of concrete was more pronounced for concrete mixtures containing both FGP and SF. These results were also supported by scanning electron microscope (SEM) studies 2015-06-16T12:05:00Z 2015-06-16T12:05:00Z 2010-01-01 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Demirel, B. ve Keleştemur, O. (2010). Effect of Elevated Temperature on the Mechanical Properties of Concrete Produced with Finely Ground Pumice and Silica Fume. Fire Safety Journal, 45(6-8), 385-391. http://hdl.handle.net/11508/8055 45 6-8 385;391 İngilizce Fire Safety Journal

oai:openaccess.firat.edu.tr:11508/80562017-11-30T16:24:36Zcom_11508_11907col_11508_11914

Utilization of Waste Vehicle Tires in Concrete and Its Effect on the Corrosion Behavior of Reinforcing Steels Keleştemur, Oğuzhan TR58964 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Vehicle tire Concrete Corrosion Reinforcing steel waste reuse The mechanical and physical properties of concrete specimens obtained from replacing natural coarse aggregate with waste vehicle rubber tires at levels of 2vol%, 5vol%, 7vol%, and 10vol% were studied, and the corrosion behavior of reinforcing steels was investigated in these specimens. Corrosion rates were determined by measuring the galvanic current between steel-reinforced concrete specimens both with and without chloride addition. The change in electrode potential of reinforcing steels in these concrete specimens was measured daily for a period of 60 d in accordance with the testing method in ASTM C876. The results show that the use of waste vehicle tires in concrete instead of coarse aggregate decreases the mechanical strength of the specimens, and increases the corrosion rates of the reinforcing steels embedded in the concretes. 2015-06-16T12:15:29Z 2015-06-16T12:15:29Z 2010-01-01 Makale - Bilimsel Dergi Makalesi - Tek Yazarlı Keleştemur, O. (2010). Utilization of Waste Vehicle Tires in Concrete and Its Effect on the Corrosion Behavior of Reinforcing Steels. International Journal of Minerals, Metallurgy and Materials, 17(3), 363-370. http://hdl.handle.net/11508/8056 17 3 363;370 İngilizce International Journal of Minerals, Metallurgy and Materials

oai:openaccess.firat.edu.tr:11508/80572017-11-30T16:24:38Zcom_11508_11907col_11508_11914

Performance Evaluation of Cement Mortars Containing Marble Dust and Glass Fiber Exposed to High Temperature by Using Taguchi Method Keleştemur, Oğuzhan Arıcı, Erdinç Yıldız, Servet Gökçer, Bihter Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Marble dust Glass fiber Cement mortar Temperature Taguchi method Analysis of varience (ANOVA) This paper investigated the effects of marble dust and glass fiber on mechanical and physical properties of cement mortars exposed to high temperature as experimentally and statistically. For this purpose, the mixes containing marble dust (0%, 20%, 40% and 50% by volume) and glass fiber (0 kg/m3 , 0.25 kg/m3 , 0.50 kg/m3 , 0.75 kg/m3 ) were prepared. The compressive strength and porosity value of the cement mortars were determined after being exposed to high temperatures (400, 600 and 800 C). In order to reduce the numbers of experiments, an L16 (43 ) Taguchi orthogonal array was adopted to the study. Percentage of marble dust, amount of glass fiber and degree of temperature were changed to explore their effects on the compressive strength and porosity values of specimens. Statistically effects of the factors were also determined by using analysis of variance (ANOVA) method. Finally, experimental findings were compared with statistical results and a good agreement between them was achieved. 2015-06-16T12:28:20Z 2015-06-16T12:28:20Z 2014-01-01 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Keleştemur, O., Arıcı, E., Yıldız, S. ve Gökçer, B. (2014). Performance Evaluation of Cement Mortars Containing Marble Dust and Glass Fiber Exposed to High Temperature by Using Taguchi Method. Construction and Building Materials, 60(1), 17-24. http://hdl.handle.net/11508/8057 60 1 17;24 Türkçe Construction and Building Materials

oai:openaccess.firat.edu.tr:11508/80582017-11-30T16:24:38Zcom_11508_11907col_11508_11914

Statistical Analysis for Freeze-Thaw Resistance of Cement Mortars Containing Marble Dust and Glass Fiber Keleştemur, Oğuzhan Yıldız, Servet Gökçer, Bihter Arıcı, Erdinç Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Concrete Taguchi method This paper investigated the usability of marble dust and glass fiber against the harmful effects of freeze–thaw (FT) cycles on cement mortars as experimentally and statistically. To this end, the cement mortar specimens containing marble dust (0%, 20%, 40% and 50% by volume) and glass fiber (0 kg/m3 , 0.25 kg/m3 , 0.50 kg/m3 , 0.75 kg/m3 ) were prepared. The compressive and flexural strengths of the specimens were determined after being exposed to FT cycles. In order to reduce the numbers of experiments, an L16 (42 21 ) Taguchi orthogonal array was adopted to the study. Amounts of glass fiber, percentages of marble dust and cycles of freeze–thaw, were changed to explore their effects on the compressive and flexural strengths of the mortar specimens. Statistically effects of the factors were also determined by using analysis of variance (ANOVA) method. Finally, experimental findings were compared with statistical results and a good agreement between them was achieved. 2015-06-16T12:37:55Z 2015-06-16T12:37:55Z 2014-01-01 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Keleştemur, O., Yıldız, S., Gökçer, B. ve Arıcı, E. (2014). Statistical Analysis for Freeze-Thaw Resistance of Cement Mortars Containing Marble Dust and Glass Fiber. Materials and Design, 60(1), 548-555. http://hdl.handle.net/11508/8058 60 1 548;555 İngilizce Materials and Design

oai:openaccess.firat.edu.tr:11508/80592017-11-30T16:24:37Zcom_11508_11907col_11508_11914

Effect of Metakaolin on the Corrosion Resistance of Strcutural Lightweight Concrete Keleştemur, Oğuzhan Demirel, Bahar Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Metakaolin Corrosion Structural lightweigth concrete Microstructure In this study, the mechanical and physical properties of structural lightweight concrete (SLC) specimens produced by substituting cement with metakaolin (MK) at ratios of 5%, 10%, 15% and 20% w/w were examined, and the corrosion behavior of the reinforcing steel bars embedded in these specimens was investigated. Corrosion rates of the bars were determined by using galvanic current measurement method. Furthermore, the corrosion potential of the steel bars in these specimens was measured daily for a period of 90 d based on ASTM C876 standard test method. As a result of this study, it was found that the MK improved the mechanical and physical properties of the SLC and the 15% w/w MK addition showed the optimum contribution to the strength development. Furthermore, the use of MK in SLC specimens, as a cement replacement up to 15% w/w, improved the corrosion resistance of the specimens, while there was no positive effect when MK was added in greater ratios. The conclusions were also supported with scanning electron microscope (SEM) studies. 2015-06-16T12:42:30Z 2015-06-16T12:42:30Z 2015-01-01 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Keleştemur, O. ve Demirel, B. (2015). Effect of Metakaolin on the Corrosion Resistance of Strcutural Lightweight Concrete. Construction and Building Materials, 81(1), 172-178. http://hdl.handle.net/11508/8059 81 1 172;178 İngilizce Construction and Building Materials

oai:openaccess.firat.edu.tr:11508/80602017-11-30T16:24:20Zcom_11508_11907col_11508_11926

Lycopene protects against cyclosporine A-induced testicular toxicity in rats Türk, G Ateşşahin, A Sönmez, M Yüce, A Çeribaşı, Ao Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Cyclosporine A Lycopene Oxidative stress Reproductive organs Sperm characteristics Cyclosporine A (CsA)-induced direct failures in hypothalamic–pituitary–gonadal axis and Sertoli cell phagocytic function have been considered for testicular toxicity so far. It has clearly been reported that oxidative stress leads to damage in sperm functions and structure of the testis. Therefore, this study was conducted to demonstrate whether CsA causes testicular and spermatozoal toxicity associated with the oxidative stress, and to investigate the possible protective effect of lycopene against CsA-induced damages in all reproductive organs and sperm characteristics in male rats. While the daily administration of CsA at the dose 15 mg/kg for 21 days significantly decreased the seminal vesicles weight, epididymal sperm concentration, motility, testicular tissue glutathione (GSH), glutathione peroxidase (GSH-Px) and catalase (CAT), diameter of seminiferous tubules and germinal cell thickness, it increased malondialdehyde (MDA) level and abnormal sperm rates along with degeneration, necrosis, desquamative germ cells in testicular tissue. However, the CsA along with simultaneous administration of lycopene at the dose of 10 mg/kg markedly ameliorated the CsA-induced all the negative changes observed in the testicular tissue, sperm parameters and oxidant/antioxidant balance. In conclusion, CsA-induced oxidative stress leads to the structural and functional damages in the testicular tissue and sperm quality of rats and, lycopene has a potential protective effect on these damages. 2015-06-17T13:01:50Z 2015-06-17T13:01:50Z 2007 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Türk, G., Ateşşahin, A., Sönmez, M., Yüce, A. ve Çeribaşı, A. (2007). Lycopene protects against cyclosporine A-induced testicular toxicity in rats. Theriogenology, 67(4), 778-785. http://hdl.handle.net/11508/8060 67 4 778;785 İngilizce Theriogenology

oai:openaccess.firat.edu.tr:11508/80612017-11-30T16:24:20Zcom_11508_11907col_11508_11926

The Effect of Electromagnetic Fields on the sperm characteristics and histopathological status of testis in rats Aydın, M Türk, G Yüksel, M Çevik, A Apaydın, Am Yılmaz, S Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Electromagnetic fields testis rat sperm characteristics The aim of the study was to investigate the effects of electromagnetic fields ELF-EMFs generated by 170 kV (50 Hz) high power lines on the epididymal sperm characteristics, biochemical parameters testosterone levels and histopathology of testis. The experimental group consisted of 28 adult male rats placed in an cottage 7.5 m far from transfer lines transferring 170 kV (50 Hz) energy. They were randomly divided into four groups of 7 rats each. Group 1, 2 and 3 were exposed continuously (24 hr) to ELF-EMF (48.21 ± 1.58 mG) for 1, 2 and 3 months, respectively. The rats of group three served as the control and were placed in laboratory conditions without a magnetic field. Insignificant (p > 0.05) decreases were determined among the groups in terms of reproductive organ weights, testes dimensions and epididymal sperm concentration and sperm motility, and an insignificant increment was observed in abnormal sperm rates in relation to the varying periods of exposure to the ELF-EMF. Although marked reductions (p < 0.001) were observed among the groups in relation to plasma and testis catalase activity, depending on exposure time, no significant differences were found in terms of glutathione and malondialdehyde levels. In the light of Johnsen s testicular biopsy score the mean scores of groups 1, 2, 3 and control were determined as 9.24 ± 0.08, 8.02 ± 0.12, 6.98 ± 0.11 and 9.88 ± 0.07, respectively. Histopathology examinations of testis revealed a deceleration of spermatogenesis and degeneration of germ cell order in relation to exposure time. 2015-06-17T13:06:44Z 2015-06-17T13:06:44Z 2007 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Aydın, M., Türk, G., Yüksel, M., Çevik, A., Apaydın, A. ve diğerleri. (2007). The Effect of Electromagnetic Fields on the sperm characteristics and histopathological status of testis in rats. Medycyna Weterynaryjna, 63(2), 178-183. http://hdl.handle.net/11508/8061 63 2 178;183 İngilizce Medycyna Weterynaryjna

oai:openaccess.firat.edu.tr:11508/80622017-11-30T16:24:19Zcom_11508_11907col_11508_11926

The protective effects of melatonin and vitamin E on antioxidant enzyme activities and epididymal sperm characteristics of homocysteine treated male rats Sönmez, M Yüce, A Türk, G Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Homocysteine Sperm Melatonin Vitamin E Lipid peroxidation Rat The aims of this study were to investigate the effects of homocysteine (Hcy) on epididymal sperm characteristics, plasma testosterone level and biochemical changes related to oxidative stress and to examine the effects of melatonin (Mlt) or Vitamin E (VE) administration on these parameters in Hcy-treated male rats. In this study, 32 adult male albino rats of Wistar strain were used. The rats were randomly divided into four groups. The first group of rats received only Hcy (0.71 mg/kg/day) intraperitonially (ip) for 6 weeks. The second group of rats was given Hcy along with simultaneous administration of Mlt (1 mg/kg/day) subcutaneously. The third group of rats received Hcy along with simultaneous administration of VE (125 mg/kg/day, ip). The fourth group of rats served as control during 6 weeks and was daily given 0.1mL of physiological saline (NaCl, 0.9%) ip. While the plasma malondialdehyde level significantly (p < 0.05) increased, the plasma superoxide dismutase, glutathione peroxidase and catalase activities significantly (p < 0.05) decreased in Hcy-treated rats when compared to control rats. Furthermore, the epididymal sperm concentration, the percentage of progressive sperm motility and plasma testosterone level were significantly (p < 0.05) lower in Hcy-treated rats than those of the control rats. The simultaneous administration of Mlt or VE to Hcy-treated animals impeded the decrease in the plasma antioxidant enzyme activities, testosterone level, the epididymal sperm concentration and motility. In conclusion, this study indicates that chronic administration of Hcy has the harmful effect on the epididymal sperm characteristics of male rats. The administration of Mlt or VE can prevent adverse effects of Hcy on the plasma antioxidant enzyme activities, testosterone level, epididymal sperm count and motility in male rats. 2015-06-17T13:10:09Z 2015-06-17T13:10:09Z 2007 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Sönmez, M., Yüce, A. ve Türk, G. (2007). The protective effects of melatonin and vitamin E on antioxidant enzyme activities and epididymal sperm characteristics of homocysteine treated male rats. Reproductive Toxicology, 23(2), 226-231. http://hdl.handle.net/11508/8062 23 2 226;231 İngilizce Reproductive Toxicology

oai:openaccess.firat.edu.tr:11508/80632017-11-30T16:24:24Zcom_11508_11907col_11508_11926

Effects of exogenous oxytocin on serologic and seminal steroids and semen characteristics in rams Bozkurt, T Türk, G Gür, S Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Oxytocin oestradiol testosterone dehydroepiandrosterone sulphate semen characteristics ram The objective of this study was to investigate the effect of IV injection of oxytocin (OT) on serum and seminal plasma levels of oestradiol (E2), testosterone (T), dehydroepiandrosterone sulphate (DHEA-S), and semen characteristics in rams. Twelve 3-year-old Awassi adult rams were randomly divided into 2 equal groups (control and treatment). Physiological saline (0.5 ml) was injected IV into each ram in the control group, whereas OT was administered IV at a single dose of 5 IU to each ram in the treatment group. Blood samples were collected from the jugular vein and semen samples were taken by an electroejaculator from all rams sequentially at 10, 60, and 120 min after the IV injection of physiological saline or OT. Administration of OT had no effect on blood or seminal plasma E2 or DHEA-S levels, or on serum T at any collection time compared to the control group. However, while OT increased significantly the level of seminal plasma T at 10 min, its effect was absent at 60 and 120 min after the injection compared to the control group. OT did not alter the semen viscosity, sperm motility, or abnormal sperm rate at all times in comparison to the control values. Although semen volume, mass activity, sperm concentration, total sperm number, and total motile sperm number of the treatment group increased significantly at 10 min compared to the control group, all these parameters decreased markedly at 60 and 120 min in comparison with 10 min after injection in both the control and treatment groups. In conclusion, exogenous OT increases seminal plasma T, semen volume, mass activity, sperm concentration, total sperm number, and total motile sperm number in the first ejaculate of the rams 10 min after the IV administration. 2015-06-17T13:14:07Z 2015-06-17T13:14:07Z 2007 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Bozkurt, T., Türk, G. ve Gür, S. (2007). Effects of exogenous oxytocin on serologic and seminal steroids and semen characteristics in rams. Turkish Journal of Veterinary and Animal Sciences, 31(5), 303-309. http://hdl.handle.net/11508/8063 31 5 303;309 İngilizce Turkish Journal of Veterinary and Animal Sciences

oai:openaccess.firat.edu.tr:11508/80642017-11-30T16:24:24Zcom_11508_11907col_11508_11926

The time-dependent motility and longevity of stallion spermatozoa diluted to different spermatozoal concentrations and extenders during cool-storage Bozkurt, T Türk, G Gür, S Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ spermatozoal concentration extender sperm motility longevity stallion The aim of this study was to investigate the time-dependent changes in motility and longevity of stallion spermatozoa diluted in different spermatozoal concentrations and extenders during cool-storage at 5 oC. Ten purebred Arabian stallions, ranging from 10-24 years of age, were used. Three semen samples were collected from each stallion by artificial vagina. Each ejaculate of 10 stallions was diluted in 3 spermatozoal concentrations (25, 50, and 75x106 in 1 ml of extender) in 3 different extenders (milk-, TRIS-based, and glucose-lactose). Sperm motility was determined at 0, 2, 4, 24, 48, 72, 96 and 120th h after the semen was diluted. All ejaculates of each Arabian stallion had a mean initial motility ≥ 80%. When it was compared the time-dependent effects of different spermatozoal concentrations in the same extender; the diluted semen with low (25x106) spermatozoal concentration had greater motility and longevity than medium (50x106) and high (75x106) spermatozoal concentration for each extender at all times during examination period. Similarly, when it was compared the time-dependent effects of different extenders in the same spermatozoal concentration; spermatozoa diluted with milkbased extender had higher motility and longevity than TRIS-based and glucose- lactose extenders for each spermatozoal concentration at all times. In conclusion, the stallion semen must be mixed with an appropriate extender that helps to the protection of spermatozoa, and spermatozoal concentration in the extender should be low level in order to gain maximum benefit from cooled stallion semen. Among the tested extenders the milk based extender preserved motility for a longer time. 2015-06-17T13:17:25Z 2015-06-17T13:17:25Z 2007 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Bozkurt, T., Türk, G. ve Gür, S. (2007). The time-dependent motility and longevity of stallion spermatozoa diluted to different spermatozoal concentrations and extenders during cool-storage. Revue de Medecine Veterinaire, 158(2), 67-72. http://hdl.handle.net/11508/8064 158 2 67;72 İngilizce Revue de Medecine Veterinaire

oai:openaccess.firat.edu.tr:11508/80652017-11-30T16:24:25Zcom_11508_11907col_11508_11926

Effect of clitoral massage on levels of estradiol, testosterone, dehydroepiandrosterone sulphate and pregnancy rate in cows Bozkurt, T Türk, G Gür, S Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ clitoral massage estradiol testosterone dehydroepiandrosterone sulphate pregnancy rate cow This study was conducted to investigate the effect of clitoral massage on levels of estradiol (E2), testosterone (T), dehydroepiandrosterone sulphate (DHEA-S) and pregnancy rate in cows. For this purpose, 38 Holstein cows ranging from 3-6 years old were used. The cows were divided into two groups, as control (n=19) and application (n=19). The degree of intensity of oestrus expression was scored on a scale of 0 to 5 by considering knowledge of anamnesis, findings of rectal palpation and inspection as a criteria. All animals of both groups were artificially inseminated by recto-vaginal method with frozen-thawed bull semen. Clitoral massage was applied to the cows in the application group for 15-30 sec. after artificial insemination. Blood samples were then taken from jugular vein and centrifuged at 5000 rpm for 5 m., and serum samples were stored deep-frozen at -20 oC. Levels of E2, T and DHEA-S were determined by RIA method. All animals were examined by rectal palpation of the uterus for pregnancy on day 75 after insemination. Clitoral massage application had no significant effect on the levels of E2, T, DHEA-S and pregnancy rate in cows. There was a significant difference (P<0.05) in the degree of the intensity of oestrus between control and application groups. A significant negative correlation (P<0.01, r = -0.93) was found between levels of E2 and T. 2015-06-17T13:20:42Z 2015-06-17T13:20:42Z 2007 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Bozkurt, T., Türk, G. ve Gür, S. (2007). Effect of clitoral massage on levels of estradiol, testosterone, dehydroepiandrosterone sulphate and pregnancy rate in cows. Veterinarski Arhiv, 77(1), 59-67. http://hdl.handle.net/11508/8065 77 1 59;67 İngilizce Veterinarski Arhiv

oai:openaccess.firat.edu.tr:11508/80662017-11-30T16:24:20Zcom_11508_11907col_11508_11926

Remote organ injury induced by myocardial ischemia and reperfusion on reproductive organs, and protective effect of melatonin in male rats Şahna, E Türk, G Ateşşahin, A Yılmaz, S Ölmez, E Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Melatonin myocardial ischemia and reperfusion oxidative stress sperm characteristics remote organ Objective: Myocardial ischemia and reperfusion (MI-R) leads to remote organ injury associated with oxidative stress. Melatonin is a well-known antioxidant and free-radical scavenger. This study was conducted to examine whether MI-R causes damage in the testes and sperm quality, and to investigate the possible protective effect of exogenous melatonin on these parameters in an in vivo rat model. Design: Experimental study. Setting: Experimental Research Center, Fırat University Medical School, Elazıg˘, Turkey. Patient(s): Eight-week-old male Wistar rats (n 18). Intervention(s): To produce MI-R, a branch of the descending left coronary artery was occluded for 30 minutes, followed by 120-minute reperfusion. Melatonin (10 mg/kg) or vehicle was given 10 minutes before ischemia via the jugular vein. Main Outcome Measure(s): Reproductive organ weights and epididymal sperm concentration, sperm motility, abnormal sperm rate, and testicular-tissue malondialdehyde (MDA) and glutathione (GSH) levels were examined after reperfusion. Result(s): MI-R significantly decreased epididymal sperm motility, and increased the testes-tissue level of MDA, compared to the control group. Administration of melatonin reversed the harmful effects of MI-R significantly. However, MI-R did not change sperm concentration, GSH levels, and reproductive organ weights. Conclusion(s): These findings indicate that MI-R leads to damage of testis tissue and sperm motility, and melatonin protects against MI-R-induced reproductive-organ injury. These results may also encourage the use of antioxidants to reduce remote organ injury in the testis after MI-R. 2015-06-17T13:24:31Z 2015-06-17T13:24:31Z 2007 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Şahna, E., Türk, G., Ateşşahin, A., Yılmaz, S. ve Ölmez, E. (2007). Remote organ injury induced by myocardial ischemia and reperfusion on reproductive organs, and protective effect of melatonin in male rats. Fertility and Sterility, 88(1), 188-192. http://hdl.handle.net/11508/8066 88 1 188;192 İngilizce Fertility and Sterility

oai:openaccess.firat.edu.tr:11508/80672017-11-30T16:24:20Zcom_11508_11907col_11508_11926

Effect of exogenous GnRH at the time of artificial insemination on reproductive performance of awassi ewes synchronized with progestagen-PMSG-PGF2α combination Türk, G Gür, S Sönmez, M Bozkurt, T Aksu, Eh Aksoy, H Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ GnRH, progesterone, synchronisation, ewe, artificial insemination This study was carried out to investigate the efficacy of PGF2a for oestrus synchronization (ES) in Awassi ewes to which were administered the progestagen–PMSG combination, and to evaluate the effect of the exogenous GnRH administration immediately after the artificial insemination (AI) on their pregnancy rate and lambing performance during the breeding season. The ewes (n ¼ 33) were treated with an intravaginal sponge impregnated with 30 mg fluorogestane acetate for 12 days and were injected with 500 IU PMSG at the time of removal of the sponge. The ewes were then divided into three equal groups of 11 ewes each. One millilitre of physiological saline (0.9% NaCl; placebo) was administered to each ewe in Group 1 at the time of second AI. Approximately 4 lg GnRH (busereline) was injected to each ewe in Group 2 immediately after second AI. A total of 150 lg PGF2a (cloprostenole) was injected at the time of sponge removal on day 12 and 4 lg GnRH immediately after the second AI was also treated to each ewe in Group 3. Intracervical AI with diluted fresh semen was performed twice at 12 and 24 h following the onset of oestrus. The injection-oestrus onset and injection-oestrus-end interval in Group 3 was significantly (p < 0.001) shorter than both Groups 1 and 2. Although the pregnancy rates of Groups 2 and 3 (81.8%; 9/11) were numerically higher than of Group 1 (63.6%; 7/11), the difference among the groups was statistically insignificant. The multiple birth rate of Group 3 was found higher than Groups 1 and 2. However, the number of single lambs of Group 1 was also higher than Groups 2 and 3 (p < 0.05). Despite the litter sizes of Groups 2 (1.27; 14/11) and 3 (1.55; 17/11) being numerically higher than Group 1 (0.73; 8/11), the differences among all the groups were statistically insignificant. In conclusion, the administration of PGF2a at the time of removal of the sponge shortens the injection oestrus-onset and oestrus-end interval in Awassi ewes treated with progestagen–PMSG. Additionally, exogenous GnRH treatment immediately after the AI increases the multiple birth rate of Awassi ewes synchronized with progestagen– PMSG–PGF2a combination. 2015-06-17T13:29:09Z 2015-06-17T13:29:09Z 2008 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Türk, G., Gür, S., Sönmez, M., Bozkurt, T., Aksu, E. ve diğerleri. (2008). Effect of exogenous GnRH at the time of artificial insemination on reproductive performance of awassi ewes synchronized with progestagen-PMSG-PGF2α combination. Reproduction in Domestic Animals, 43(3), 308-313. http://hdl.handle.net/11508/8067 43 3 308;313 İngilizce Reproduction in Domestic Animals

oai:openaccess.firat.edu.tr:11508/80682017-11-30T16:24:21Zcom_11508_11907col_11508_11926

Improvement of cisplatin-induced injuries to sperm quality, the oxidant-antioxidant system, and the histologic structure of the rat testis by ellagic acid Türk, G Ateşşahin, A Sönmez, M Çeribaşı, Ao Yüce, A Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Cisplatin ellagic acid oxidative stress sperm characteristics testis rat Objective: To investigate whether ellagic acid (EA) has a possible protective effect against cisplatin (CP)-induced negative changes in epididymal sperm characteristics and the histologic structure of testis and prostate associated with oxidative stress in rats. Design: Experimental study. Setting: Fırat University Medical School Experimental Research Center, Elazı g, Turkey. Patient(s): Eight-week-old adult male Sprague Dawley rats (n ¼ 24). Intervention(s): Cisplatin was administered to rats at a single dose of 7 mg/kg IP. Ellagic acid was administered both separately and simultaneously with CP by gavage daily for 10 days at the dose of 10 mg/kg. Main Outcome Measure(s): Reproductive organ weights, epididymal sperm characteristics, and histopathologic structure of testes and ventral prostate were determined along with malondialdehyde (MDA) and glutathione (GSH) levels and glutathione-peroxidase (GSH-Px) and catalase (CAT) activities of plasma, sperm, and testicular tissue. Result(s): Ellagic acid ameliorated the CP-induced reductions in weights of testes, epididymides, seminal vesicles, and prostate along with epididymal sperm concentration and motility. Additionally, EA decreased the CP-induced increments in abnormalities of sperm. Whereas CP increased the MDA levels of plasma, sperm, and testicular tissue, it decreased the GSH-Px and CATactivities in the study samples compared with the control group. The administration of EA to CP-treated rats decreased the MDA level and increased GSH-Px and CATactivities in these samples. Cisplatin caused degeneration, necrosis, interstitial edema, and reduction in germinative cell layer thickness and rarely reduction in spermatogenic activity in some seminiferous tubules. The CP-induced changes in histopathologic findings of testis were partially reversed by treatment with EA. No significant changes were observed in the histopathologic structure of the prostate among any of groups. Conclusion(s): Ellagic acid has a protective effect against testicular toxicity caused by CP. This protective effect of EA seems to be closely involved with the suppressing of oxidative stress. 2015-06-17T13:32:32Z 2015-06-17T13:32:32Z 2008 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Türk, G., Ateşşahin, A., Sönmez, M., Çeribaşı, A. ve Yüce, A. (2008). Improvement of cisplatin-induced injuries to sperm quality, the oxidant-antioxidant system, and the histologic structure of the rat testis by ellagic acid. Fertility and Sterility, 89(5S), 1474-1481. http://hdl.handle.net/11508/8068 89 5S 1474;1481 İngilizce Fertility and Sterility

oai:openaccess.firat.edu.tr:11508/80692017-11-30T16:24:22Zcom_11508_11907col_11508_11926

Effects of pomegranate juice consumption on sperm quality, spermatogenic cell density, antioxidant activity and testosterone level in male rats Türk, G Sönmez, M Aydın, M Yüce, A Gür, S Yüksel, M Aksu, Eh Aksoy, H Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Pomegranate juice Spermatogenic cell density Sperm characteristics Testosterone Lipid peroxidation Antioxidant enzymes Background & aim: Pomegranate fruit is inescapably linked with fertility, birth and eternal life because of its many seeds. The aim of this study was to investigate the effects of pomegranate juice (PJ) consumption on sperm quality, spermatogenic cell density, antioxidant activity and testosterone level of male healthy rats. Methods: Twenty-eight healthy adult male Wistar rats were divided into four groups; each group containing seven rats. One milliliter distilled water, 0.25 mL PJ plus 0.75 mL distilled water, 0.50 mL PJ plus 0.50 mL distilled water and 1 mL PJ were given daily for seven weeks by gavage to rats in the first, second, third and fourth groups, respectively. Body and reproductive organ weights, spermatogenic cell density, sperm characteristics, levels of antioxidant vitamins, testosterone, and lipid peroxidation and, antioxidant enzyme activities were investigated. All analyses were done only once at the end of the seven week study period. Data were compared by analysis of variance (ANOVA) and the degree of significance was set at P < 0.05. Results: A significant decrease in malondialdehyde (MDA) level and marked increases in glutathione (GSH), glutathione peroxidase (GSH-Px) and catalase (CAT) activities, and vitamin C level were observed in rats treated with different doses of PJ. PJ consumption provided an increase in epididymal sperm concentration, sperm motility, spermatogenic cell density and diameter of seminiferous tubules and germinal cell layer thickness, and it decreased abnormal sperm rate when compared to the control group. Conclusion: The results suggest that PJ consumption improves sperm quality and antioxidant activity of rats. 2015-06-17T13:37:05Z 2015-06-17T13:37:05Z 2008 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Türk, G., Sönmez, M., Aydın, M., Yüce, A., Gür, S. ve diğerleri. (2008). Effects of pomegranate juice consumption on sperm quality, spermatogenic cell density, antioxidant activity and testosterone level in male rats. Clinical Nutrition, 27(2), 289-296. http://hdl.handle.net/11508/8069 27 2 289;296 İngilizce Clinical Nutrition

oai:openaccess.firat.edu.tr:11508/80702017-11-30T16:24:24Zcom_11508_11907col_11508_11926

The effect of vitamin E treatment during preovulatory period on reproductive performance of goats following estrous synchronization using intravaginal sponges Sönmez, M Bozkurt, T Türk, G Gür, S Kızıl, M Yüce, A Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Vitamin E Oxidative stress Reproductive performance Vaginal sponge Goat The objectives of this study were to investigate whether the use of intravaginal sponge for estrous synchronization of goats causes oxidative stress, and to examine the effect of administering vitamin E during preovulatory period on reproductive performance of estrous synchronized goats. Estrus was synchronized in 36 nonlactating adult does using intravaginal sponges containing 30mg of fluorogestane acetate (FGA) for 14 days. All females received 500 IU of eCG at the sponge withdrawal. The goats were allocated at random to two groups balanced for breed, age and body weight. Treatment group (n = 18) received 200mg of vitamin E i.m. at the time of sponge removal and again at the time of second artificial insemination. The other 18 goats (control) were administered 1 ml of physiological saline instead of vitamin E on each of these two occasions. All does in estrus was intracervically inseminated at 12 and 24 h after the onset of estrus. Blood samples were collected every 72 h during the experimental period for evaluation of malondialdehyde (MDA) and vitamin E concentrations. Serum MDA level increased and vitamin E concentration decreased during the period of vaginal sponge application. Following the sponge removal, MDA level declined rapidly to below basal level in the treatment group but remained high in the control group. Conversely, vitamin E concentration increased in the treatment group after the sponge withdrawal and remained at a low level in the control group. No statistically significant differences (P > 0.05) were observed between groups in terms of estrous response, conception rate, gestation length or kidding rate.However, thenumber of multiple births (70.0% versus 50.0%) and prolificacy rate (2.40±0.37 versus 1.63±0.26 kids per kidding) were significantly higher (P < 0.05) for the treatment group than those of the control group. The results indicate that the use of intravaginal sponges for estrous synchronization of goats causes an increase in level of oxidative stress. However, the vitamin E treatment during preovulatory period can prevent the overproduction of reactive oxygen species (ROS), and it may improve the multiple birth rates and the number of kids born in estrous synchronized goats. 2015-06-17T13:41:21Z 2015-06-17T13:41:21Z 2009 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Sönmez, M., Bozkurt, T., Türk, G., Gür, S., Kızıl, M. ve diğerleri. (2009). The effect of vitamin E treatment during preovulatory period on reproductive performance of goats following estrous synchronization using intravaginal sponges. Animal Reproduction Science, 114(1-3), 183-192. http://hdl.handle.net/11508/8070 114 1-3 183;192 İngilizce Animal Reproduction Science

oai:openaccess.firat.edu.tr:11508/81342017-11-30T16:24:51Zcom_11508_11907col_11508_11937

Yurt Dışında Yaşayan Türklerin Türkiye’nin Avrupa Birliği’ne Katılım Sürecine İlişkin Görüşleri. Korkmaz, M., Aras, G., Yücel, A. S., Fırat Üniversitesi Kütüphanesi::SOSYAL BİLİMLER Avrupa Birliği, Türkiye, Katılım Süreci, Türkiye AB ilişkileri sadece siyasi bir süreçten ibaret değildir. Bu süreç içerisinde yaşayan halklar vardır. Bu kişilerin AB’ye ilişkin düşüncelerini, beklentilerini ve yaşam deneyimlerini öğrenmek demokrasi ve onunla ilişkili olarak AB’ye yönelik bilinçli bir kamu (gündemi) oluşturabilmek açısından gereklidir. Türk insanı göçmen statüsü veya vatandaş olarak yıllardır AB ülkelerinde yaşamaktadır. Ancak gelinen noktada Türkiye’nin üyeliğinin artık ne kadar gerekli olduğu ve Türk insanına neler sağlayabileceği sorgulanmaktadır. Bu araştırma, AB deneyimini fiili olarak yaşamakta olan Türk vatandaşlarının Birlik hakkındaki düşüncelerini bilimsel verilerle ortaya koymak amacıyla yapılmıştır. Bir anket uygulaması ile desteklenen bu çalışmada önemli bulgulara ulaşılmıştır. Bu araştırmada Yurtdışında yaşayan Türklerin Avrupa Birliği’ne ve Türkiye’nin AB’ye üyeliğine bakış açısı konusu incelenmiştir. Bu bağlamda Avrupa genelinde toplam 6 ülkede 5515 katılımcıya iki bölümden oluşan toplam 35 soruluk bir anket formu uygulanmıştır. Avrupa Birliği hakkında ne derece bilgiye sahip oldukları ve bilgi kaynaklarının neler olduğu, AB’ye ilişkin düşünceleri ve ardından AB ve entegrasyon hakkındaki görüşleri 5’li likert ölçekle sorgulanmıştır. AB’ye ilişkin özelliklerin demografik değişkenlere göre değişim gösterip göstermediği test edilmiştir. Oluşturulan ölçeğin güvenilirliğini test etmek amacıyla Cronbach’s alpha analizi uygulanmış ve güvenirlik katsayısı 0,952 olarak bulunmuştur. Sonuç olarak, Türklerin Avrupa kıtasındaki varlığının Türkiye’nin AB’ye üye olma sürecinde bir destek olduğu görülmektedir. Özellikle STK’ların temsiliyeti Türkiye’nin AB’ye girmesi konusunda oldukça destek olmaktadır. Katılımcılar Türkiye’nin AB’ye girmesine imkânsız olarak bakmaktadırlar. Türkiye’nin hiçbir zaman bir AB ülkesi olamayacağına dair inanç yüksektir. Yaş değişkeni ile AB’ye katılım konusunda destek ve ülkeye uyum sorununa ilişkin görüşlerde farklılıklar tespit edilmiştir. Ayrıca gelir durumu ülkelere göre farklılık göstermemektedir. Tüm ülke vatandaşlarının gelir düzeylerinin düşük olduğu bulunmuştur. Cinsiyet ile AB’nin dezavantajlı olduğunu düşünme arasındaki ilişki bağımsız bulunmuştur. Her iki cinste AB dezavantajlı olarak görülmektedir. 2015-06-22T14:38:12Z 2015-06-22T14:38:12Z 2015 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı (2015). Yurt Dışında Yaşayan Türklerin Türkiye’nin Avrupa Birliği’ne Katılım Sürecine İlişkin Görüşleri.. Uluslararası Hakemli Beşeri ve Akademik Bilimler Dergisi., Cilt: 4(Sayı: 12), 218-241. http://hdl.handle.net/11508/8134 Cilt: 4 Sayı: 12 218;241 Türkçe Uluslararası Hakemli Beşeri ve Akademik Bilimler Dergisi.

oai:openaccess.firat.edu.tr:11508/80722017-11-30T16:29:28Zcom_11508_11907col_11508_11926

Modulatory effects of lycopene and ellagic acid on reproductive dysfunction induced by polychlorinated biphenyl (Aroclor 1254) in male rats Ateşşahin, A Türk, G Yılmaz, S Sönmez, M Sakin, F Çeribaşı, Ao Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Aroclor Lycopene Ellagic acid Sperm Testis Rat The present study was conducted to investigate the possible protective effects of lycopene (LP) and ellagic acid (EA) on aroclor (AR) 1254-induced testicular and spermatozoal toxicity associated with the oxidative stress and apoptosis in male rats. The control group was treated with placebo. LP (10 mg ⁄ kg ⁄ every other day), EA (2 mg ⁄ kg ⁄ every other day) and AR (2 mg⁄ kg ⁄ day) groups were given alone LP, EA and AR respectively. One of the last two groups received AR + LP, and the other treated with AR + EA. Body and reproductive organ weights, epididymal sperm characteristics, testicular tissue lipid peroxidation levels, antioxidant enzyme activities, histopathological changes and apoptosis via Bax and Bcl-2 genes were investigated. AR administration caused statistically significant decreases in body-weight, epididymal sperm concentration, testicular superoxide dismutase activity, diameters of seminiferous tubules, germinal cell layer thickness and Johnsen’s testicular score, and increases in relative weights of testis, epidydimis and seminal vesicles, rates of abnormal sperm and apoptotic cell expression along with degeneration, desquamation and disorganization in spermatogenic cells, and interstitial oedema and congestion in testicular tissue. LP and EA treatments to AR-treated rats markedly decreased abnormal sperm rates, testicular thiobarbituric acid reactive substances level, and increased the glutathione (GSH) level, GSH-peroxidase, catalase activities and epidiymal sperm concentration as compared with the alone AR group. Additionally, the AR-induced histopathological damages were totally or partially recovered by LP or EA administrations respectively. AR damages the testicular tissue and spermatozoa by impairing the oxidant ⁄ antioxidant balance and by increasing the apoptotic spermatogenic cell rates. However, both LP and EA have modulator effects on AR-induced reproductive dysfunction in male rats 2015-06-18T10:34:21Z 2015-06-18T10:34:21Z 2010 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Ateşşahin, A., Türk, G., Yılmaz, S., Sönmez, M., Sakin, F. ve diğerleri. (2010). Modulatory effects of lycopene and ellagic acid on reproductive dysfunction induced by polychlorinated biphenyl (Aroclor 1254) in male rats. Basic and Clinical Pharmacology and Toxicology, 106(6), 479-489. http://hdl.handle.net/11508/8072 106 6 479;489 İngilizce Basic and Clinical Pharmacology and Toxicology

oai:openaccess.firat.edu.tr:11508/80732017-11-30T16:29:31Zcom_11508_11907col_11508_11926

Antiperoxidative and anti-apoptotic effects of lycopene and ellagic acid on cyclophosphamide-induced testicular lipid peroxidation and apoptosis Türk, G Çeribaşı, Ao Sakin, F Sönmez, M Ateşşahin, A Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Cyclophosphamide Lycopene Ellagic acid Sperm characteristics Rat The present study was conducted to investigate the possible protective effects of lycopene (LC) and ellagic acid (EA) on cyclophosphamide (CP)-induced testicular and spermatozoal toxicity associated with the oxidative stress and apoptosis in male rats. Forty-eight healthy adult male Sprague-Dawley rats were divided into six groups of eight rats each. The control group was treated with placebo; the LC, EA and CP groups were given LC (10 mg kg−1), EA (2 mg kg−1) and CP (15 mg kg−1), respectively, alone; the CP+LC group was treated with a combination of CP (15 mg kg−1) and LC (10 mg kg−1); and the CP+EA group was treated with a combination of CP (15 mg kg−1) and EA (2 mg kg−1). All treatments were maintained for 8 weeks. At the end of the treatment period, bodyweight and the weight of the reproductive organs, sperm concentration and motility, testicular tissue lipid peroxidation, anti-oxidant enzyme activity and apoptosis (i.e. Bax and Bcl-2 proteins) were determined. Administration of CP resulted in significant decreases in epididymal sperm concentration and motility and significant increases in malondialdehyde levels. Although CP significantly increased the number of Bax-positive (apoptotic) cells, it had no effect on the number of Bcl-2-positive (anti-apoptotic) cells compared with the control group. However, combined treatment of rats with LC or EA in addition to CP prevented the development of CP-induced lipid peroxidation and sperm and testicular damage. In conclusion, CP-induced lipid peroxidation leads to structural and functional damage, as well as apoptosis, in spermatogenic cells of rats. Both LC and EA protect against the development of these detrimental effects. 2015-06-18T10:40:11Z 2015-06-18T10:40:11Z 2010 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Türk, G., Çeribaşı, A., Sakin, F., Sönmez, M. ve Ateşşahin, A. (2010). Antiperoxidative and anti-apoptotic effects of lycopene and ellagic acid on cyclophosphamide-induced testicular lipid peroxidation and apoptosis. Reproduction Fertility and Development, 22(4), 587-596. http://hdl.handle.net/11508/8073 22 4 587;596 İngilizce Reproduction Fertility and Development

oai:openaccess.firat.edu.tr:11508/80812017-11-30T16:29:33Zcom_11508_11907col_11508_11913

The Effects of Using Styrene-Butadiene-Styrene and Fly Ash Together on the Resistance to Moisture-Induced Damage, Permanent Deformation and Fatigue of Hot Mixture Asphalt SBS VE UÇUCU KÜLÜN BİRLİKTE KULLANIMININ NEM HASARINA BAĞLI DİRENÇ, KALICI DEFORMASYON VE SICAK BİTÜMLÜ KARIŞIMLARIN YORULMASI ÜZERİNDEKİ ETKİLERİ Alataş, Taner Kizirgil, Mustafa Ethem TR103256 TR30991 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ hot mix asphalt additive fly ash sbs mechanical properties In this study, the effects of combined utilization of Styrene-Butadiene-Styrene (SBS) in bitumen modification and fly ash in modification of mixtures on the mechanical properties of hot mix asphalts were investigated. Within the scope of this study, 12 different mixtures were obtained by combination of three different proportions of SBS additive relative to the total bitumen mass (0, 3 and 6 wt.%) with four different proportions of fly ash replacement relative to the total aggregate mass (0, 2, 4 and 6 wt.%). As a result of these tests, the use of fly ash was found to reduce the Optimum Bitumen Content (OBC), while the use of SBS increased the OBC. It was determined that the individual utilization of SBS and fly ash improved the stability of the mixtures, resilience at normal temperatures, resistance against moisture-induced damage, fatigue life and strength against permanent deformation. In addition, it was found that using only SBS in bitumen modification at 3 wt.% without using fly ash and the use of only fly ash as filler at a proportion of 6 wt.% with pure bitumen yielded similar results. The combined usage of SBS and fly ash was ascertained to boost the associated positive effects, while a comparison of separate additions showed that SBS is more effective than fly ash. Besides, it was also detected that as the SBS content in the mixture increased, the effectiveness of fly ash decreased. 2015-06-18T11:14:02Z 2015-06-18T11:14:02Z 2013 Makale - Yabancı Dilde Makale Alataş, T. ve Kizirgil, M. (2013). The Effects of Using Styrene-Butadiene-Styrene and Fly Ash Together on the Resistance to Moisture-Induced Damage, Permanent Deformation and Fatigue of Hot Mixture Asphalt [SBS VE UÇUCU KÜLÜN BİRLİKTE KULLANIMININ NEM HASARINA BAĞLI DİRENÇ, KALICI DEFORMASYON VE SICAK BİTÜMLÜ KARIŞIMLARIN YORULMASI ÜZERİNDEKİ ETKİLERİ]. KSCE Journal of Civil Engineering (2013), 17(5), 1030-1039. http://hdl.handle.net/11508/8081 17 5 1030;1039 10.1007 İngilizce KSCE Journal of Civil Engineering (2013)

oai:openaccess.firat.edu.tr:11508/80742017-11-30T16:29:32Zcom_11508_11907col_11508_11926

Attenuation of cyclosporine A-induced testicular and spermatozoal damages associated with oxidative stress by ellagic acid Türk, G Sönmez, M Çeribaşı, Ao Yüce, A Ateşşahin, A Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Cyclosporine A Ellagic acid Lipid peroxidation Reproductive organs Sperm This study was conducted to investigate the possible protective effect of ellagic acid (EA) on cyclosporine A (CsA)-induced testicular and spermatozoal damages associated with oxidative stress in male rats. Forty adult male Sprague–Dawley rats were divided into 4 groups of 10 animals each. Control group was used as placebo. Cyclosporine group received CsA at the dose of 15 mg/kg/day. Ellagic acid group was treated with EA (10 mg/kg/day). Cyclosporine plus ellagic acid group received CsA+EA. Reproductive organs were weighed and epididymal sperm characteristics and histopathological structure of testes were examined along with malondialdehyde (MDA) and glutathione (GSH) levels, glutathione-peroxidase (GSH-Px) and catalase (CAT) activities in testicular tissue. CsA significantly decreased the weights of testes and ventral prostate, epididymal sperm concentration, motility, testicular tissue glutathione (GSH), glutathioneperoxidase (GSH-Px) and catalase (CAT), diameters of seminiferous tubules and germinal cell layer thickness, and it significantly increased malondialdehyde (MDA) level and abnormal sperm rates along with degeneration, necrosis, immature germ cells, congestion and atrophy in testicular tissue. However, the CsA plus EA treatment attenuated all the CsA-induced negative changes observed in the testicular tissue, sperm and oxidant/antioxidant parameters. In conclusion, CsA-induced oxidative stress leads to the structural and functional damages in the testicular tissue and sperm quality of rats, and also EA has a protective effect on these damages. 2015-06-18T10:45:14Z 2015-06-18T10:45:14Z 2010 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Türk, G., Sönmez, M., Çeribaşı, A., Yüce, A. ve Ateşşahin, A. (2010). Attenuation of cyclosporine A-induced testicular and spermatozoal damages associated with oxidative stress by ellagic acid. International Immunopharmacology, 10(2), 177-182. http://hdl.handle.net/11508/8074 10 2 177;182 İngilizce International Immunopharmacology

oai:openaccess.firat.edu.tr:11508/80772017-11-30T16:29:32Zcom_11508_11907col_11508_11930

A least squares support vector machine model for prediction of the next day solar insolation for effective use of PV systems Bektaş Ekici, Betül TR18334 Fırat Üniversitesi Kütüphanesi::TEKNOLOJİ Least squares support vector machines Regression Prediction Solar insolation Temperature Accurate prediction of daily solar insolation has been one of the most important issues of solar engineering. The amount of solar insolation on a given location is a vital data for photovoltaic plants. Systems efficiency is easily affected by the changes in solar radiation so, this study is aimed to develop a Least Squares Support Vector Machine (LS-SVM) based intelligent model to predict the next day’s solar insolation for taking measures. Daily temperature and insolation data measured by Turkish State Meteorological Service for three years (2000–2002) were used as training data and the values of 2003 used as testing data. Numbers of the days from 1st January, daily mean temperature, daily maximum temperature, sunshine duration and the solar insolation of the day before parameters have been used as inputs to predict the daily solar insolation. The simulations were carried out with SVM Toolbox of MATLAB software. As a conclusion the results show that LS-SVM is a good method in estimating the amount of solar insolation of a given location with 99.294% accuracy. 2015-06-18T10:59:24Z 2015-06-18T10:59:24Z 2014-01-18 Makale - Bilimsel Dergi Makalesi - Tek Yazarlı Bektaş Ekici, B. (2014). A least squares support vector machine model for prediction of the next day solar insolation for effective use of PV systems. Measurement, 50(1), 255-262. http://hdl.handle.net/11508/8077 50 1 255;262 10.1016/j.measurement.2014.01.010 İngilizce Measurement

oai:openaccess.firat.edu.tr:11508/80752017-11-30T16:29:28Zcom_11508_11907col_11508_11926

Toxic effect of cyclophosphamide on sperm morphology, testicular histology and blood oxidant-antioxidant balance, and protective roles of lycopene and ellagic acid Çeribaşı, Ao Türk, G Sönmez, M Sakin, F Ateşşahin, A Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Cyclophosphamide Lycopene Ellagic acid Sperm morphology Oxidative stress Testis histopathology In this study, the toxic effect of cyclophosphamide (CP) on sperm morphology, testicular histology and blood oxidant– antioxidant balance, and protective roles of lycopene (LC) and ellagic acid (EA) were investigated. For this purpose, 48 healthy, adult, male Sprague-Dawley rats were divided into six groups; eight animals in each group. The control group was treated with placebo. LC, EA and CP groups were given alone LC (10 mg ⁄ kg ⁄ every other day), EA (2 mg ⁄ kg ⁄ every other day) and CP (15 mg⁄ kg ⁄week) respectively. One of the last two groups received CP + LC, and the other treated with CP + EA. All treatments were maintained for 8 weeks. At the end of the treatment period, morphological abnormalities of sperm, plasma malondialdehyde (MDA) levels and glutathione (GSH) levels, and GSH-peroxidase (GSH-Px), catalase (CAT) and superoxide dismutase (SOD) activities in erythrocytes, and testicular histopathological changes were examined. CP administration caused statistically significant increases in tail and total abnormality of sperm, plasma MDA level and erythrocyte SOD activity, and decreases in erythtocyte CAT activity, diameters of seminiferous tubules, germinal cell layer thickness and Johnsen’s Testicular Score along with degeneration, necrosis, immature germ cells, congestion and atrophy in testicular tissue. However, LC or EA treatments to CP-treated rats markedly improved the CP-induced lipid peroxidation, and normalized sperm morphology and testicular histopathology. In conclusion, CP-induced lipid peroxidation leads to the structural damages in spermatozoa and testicular tissue of rats, and also LC or EA have a protective effect on these types of damage. 2015-06-18T10:49:53Z 2015-06-18T10:49:53Z 2010 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Çeribaşı, A., Türk, G., Sönmez, M., Sakin, F. ve Ateşşahin, A. (2010). Toxic effect of cyclophosphamide on sperm morphology, testicular histology and blood oxidant-antioxidant balance, and protective roles of lycopene and ellagic acid. Basic and Clinical Pharmacology and Toxicology, 107(3), 730-736. http://hdl.handle.net/11508/8075 107 3 730;736 İngilizce Basic and Clinical Pharmacology and Toxicology

oai:openaccess.firat.edu.tr:11508/80762017-11-30T16:29:31Zcom_11508_11907col_11508_11926

Effect of pregnancy and foetal number on diameter of corpus luteum, maternal progesterone concentration and oxidant/antioxidant balance in ewes Gür, S Türk, G Demirci, E Yüce, A Sönmez, M Özer, Ş Aksu, Eh Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Pregnancy Foetal number Corpus luteum Oxidative stress Progesterone Ewe The aim of this study was to determine the changes in diameter of corpus luteum (CL), maternal progesterone (P) concentration, lipid peroxidation and non-enzymatic antioxidant levels along with enzymatic antioxidant activities in pregnant ewes bearing single and twin foetuses. The ewes were selected from healthy animals that were brought to the abattoir for slaughtering. The ewes were divided into three groups: Group 1 (non-pregnant, non-oestrous, n = 30), Group 2 (pregnant bearing a single foetus, n = 30) and Group 3 (pregnant bearing twin foetuses, n = 12) after they were slaughtered. Pregnant ewes were in the first half of the pregnancy. The diameter of CL and P concentration of pregnant ewes bearing a single foetus or twin foetuses were found higher than that found in non-pregnant ewes. Similarly, the P concentration of pregnant ewes bearing twin foetuses was higher than that found in pregnant ewes bearing a single foetus. Malondialdehyde (MDA) level in pregnant ewes bearing twin foetuses was higher than that found in both non-pregnant and pregnant ewes bearing a single foetus. The serum glutathione (GSH) level and glutathione-peroxidase (GSH-Px) activity of pregnant ewes bearing twin foetuses were found lower than that found in non-pregnant ewes. Additionally, the GSH-Px activity of pregnant ewes bearing twin foetuses was found lower than that found in pregnant ewes bearing a single foetus. No significant difference was found between pregnant ewes bearing female and male foetus with respect to diameter of CL, P concentration and oxidative stress parameters. There were significant positive correlations between foetal number (0, 1, 2) and diameter of CL, P concentration, MDA level, and between P concentration and diameter of CL, MDA level. However, significant negative correlations were found between foetal number (0, 1, 2) and GSH level, GSH-Px activity, and between P concentration and GSH-Px activity. In conclusion, the diameter of CL enlarges, P production increases and oxidant ⁄ antioxidant balance impairs because of the gestation stress in ewes during pregnancy. 2015-06-18T10:55:22Z 2015-06-18T10:55:22Z 2011 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Gür, S., Türk, G., Demirci, E., Yüce, A., Sönmez, M. ve diğerleri. (2011). Effect of pregnancy and foetal number on diameter of corpus luteum, maternal progesterone concentration and oxidant/antioxidant balance in ewes. Reproduction in Domestic Animals, 46(2), 289-295. http://hdl.handle.net/11508/8076 46 2 289;295 İngilizce Reproduction in Domestic Animals

oai:openaccess.firat.edu.tr:11508/80782017-11-30T16:29:27Zcom_11508_11907col_11508_11926

Lycopene and ellagic acid prevent testicular apoptosis induced by cisplatin Türk, G Çeribaşı, Ao Şahna, E Ateşşahin, A Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Cisplatin Lycopene Ellagic acid Apoptosis Lipid peroxidation Testis The aim of this studywasto investigate the possible protective effects of lycopene (LC) and ellagic acid (EA) on cisplatin (CP)-induced testicular apoptosis in male rats. The control group was treated with placebo; LC, EA and CP groups were given alone LC, EA and CP, respectively; the CP + LC group was treated with a combination of CP and LC; and the CP + EAgroup was treated with a combination of CP and EA. Although CP significantly increased the number of Bax-positive (apoptotic) cells it had no effect on the number of Bcl- 2-positive (antiapoptotic) cells compared with the control group. Administration of CP caused significant increase in lipid peroxidation and nonsignificant decrease in superoxide dismutase (SOD) activity along with some histopathological lesions in testicular tissue. However, combined treatments of LC or EA in addition to CP tended to prevent the CP-induced testicular apoptosis, histopathological lesions and lipid peroxidation. 2015-06-18T11:00:14Z 2015-06-18T11:00:14Z 2011 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Türk, G., Çeribaşı, A., Şahna, E. ve Ateşşahin, A. (2011). Lycopene and ellagic acid prevent testicular apoptosis induced by cisplatin. Phytomedicine, 18(5), 356-361. http://hdl.handle.net/11508/8078 18 5 356;361 İngilizce Phytomedicine

oai:openaccess.firat.edu.tr:11508/80792017-11-30T16:29:30Zcom_11508_11907col_11508_11926

Protective effects of nanostructures of hydrated C60 fullerene on reproductive function in streptozotocin-diabetic male rats Bal, R Türk, G Tuzcu, M Yılmaz, Ö Özercan, İ Kuloğlu, T Gür, S Nedzvetsky, Vs Tykhomyrov, Aa Andrievsky, Gv Baydaş, G Naziroğlu, M Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Streptozotocin Diabetes mellitus Hydrated C60 fullerene Testis Oxidative stress Apoptosis Sperm characteristics Fatty acid composition Diabetes mellitus is a well-recognized cause of male sexual dysfunction and impairments of male fertility. Streptozotocin (STZ) is used for medical treatment of neoplastic islet -cells of pancreas and producing of animal model of diabetes mellitus type 1 that is characterized by suppression of reproductive activity due to the hyperglycaemia-induced oxidative stress and histopathological alterations in testes. Seeking for the agents that could alleviate diabetes-induced damage to reproductive system is yet the important area of inquiry. The present study was designed to evaluate whether hydrated C60 fullerene (C60HyFn), which is known to be powerful bioantioxidant, eliminate testicular dysfunction induced by STZ-diabetes in rats. Wistar strain male albino rats were divided into four groups of six animals each: (1) control group, (2) C60HyFn-treated nondiabetic group, (3) STZ-diabetic group and (4) C60HyFn-treated diabetic group. Once hyperglycaemia was induced by STZ, rats in the second and fourth groups were treated with C60HyFn (in the form of drinking water) at the dose of 4 g/kg daily for 5 weeks. In diabetic rats, relative weights of right cauda epididymis, seminal vesicles, prostate, sperm motility and epididymal sperm concentration were significantly less than those of control group, but which were restored in the fourth group treated with C60HyFn (p < 0.001). In hematoxylin and eosin staining, marked histopathological changes including degeneration, desquamation, disorganisation and reduction in germinal cells, interstitial oedema and congestion were evident in the testis of diabetic rats, but C60HyFn treatment resulted in recovery of histopathological changes and an increase in Johnsen’s testicular score significantly (p < 0.001). C60HyFn treatment restores the increased apoptosis induced by STZ-diabetes. In diabetic rats, levels of serum testosterone, testicular reduced glutathione (GSH) and alpha-tocopherol were significantly reduced and testicular lipid peroxidation level was increased (p < 0.001). Nevertheless, treatment of diabetic rats with C60HyFn resulted in significant corrective effects on these parameters towards the control levels. C60HyFn, applied alone, did not exert any toxic effects in testicular tissues. Furthermore, C60HyFn treatment in diabetic and nondiabetic rats resulted in considerable elevations of some important polyunsaturated fatty acids. In conclusion, we have presented for the first time substantial evidence that administration of C60HyFn significantly reduces diabetes-induced oxidative stress and associated complications such as testicular dysfunction and spermatogenic disruption 2015-06-18T11:07:14Z 2015-06-18T11:07:14Z 2011 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Bal, R., Türk, G., Tuzcu, M., Yılmaz, Ö., Özercan, İ. ve diğerleri. (2011). Protective effects of nanostructures of hydrated C60 fullerene on reproductive function in streptozotocin-diabetic male rats. Toxicology, 282(3), 69-81. http://hdl.handle.net/11508/8079 282 3 69;81 İngilizce Toxicology

oai:openaccess.firat.edu.tr:11508/80802017-11-30T16:29:32Zcom_11508_11907col_11508_11926

Attenuating effect of lycopene and ellagic acid on 2,3,7,8-tetrachlorodibenzo-p-dioxin-induced spermiotoxicity and testicular apoptosis Sönmez, M Türk, G Çeribaşı, Ao Sakin, F Ateşşahin, A Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Environmental pollutant, carotenoid, polyphenol, male reproduction, oxidative stress This study was conducted to investigate the prophylactic effects of lycopene (LC) and ellagic acid (EA) on 2,3,7,8- tetrachlorodibenzo-p-dioxin (TCDD)-induced testicular and spermatozoal toxicity. These toxicological changes are associated with the oxidative stress and apoptosis in male rats. Forty-eight male rats were allocated to one of six groups of 8 rats each: control, LC, EA, TCDD, TCDD+LC, and TCDD+EA. The control group was treated with 0.5 mL/ rat slightly alkaline solution+0.5 mL/rat corn oil every other day. The LC group was treated with 0.5 mL/rat slightly alkaline solution+0.5 mL/rat corn oil containing 10 mg/kg of LC every other day. The EA group received 0.5 mL/rat corn oil+0.5 mL/rat slightly alkaline solution containing 2 mg/kg of EA every other day. The TCDD group received 0.5 mL/rat corn oil containing 100 ng/kg/day of TCDD+0.5 mL/rat slightly alkaline solution. The TCDD+LC group was treated with 0.5 mL/rat TCDD+0.5 mL/rat LC. The TCDD+EA group was treated with 0.5 mL/rat TCDD+0.5 mL/rat EA. All treatments were made by gavage, and the experimental period was maintained during 8 weeks. Sperm motility, concentration, and abnormal sperm rate in epididymal tissue, testicular tissue lipid peroxidation (LPO), antioxidant enzyme activity, histopathological changes, and apoptosis (i.e., Bax and Bcl-2 proteins) were determined. TCDD exposure resulted in significant decreases in sperm motility, concentration, testicular superoxide dismutase activity, germinal cell-layer thickness, Johnsen’s testicular score, and significant increases in abnormal sperm rate, testicular malondialdehyde, glutathione levels, Bax-positive staining, and Bax-positive apoptotic cell score, along with some testicular histopathological lesions. TCDD treatment did not affect significantly catalase activity. However, combined treatment with LC or EA, in addition to TCDD, prevented the development of TCDD-induced damages in sperm quality, testicular histology, and LPO. Improvements in testicular apoptosis after the administration of LC and EA to TCDD-treated rats were minimal, but not statistically significant. TCDD-induced lipid peroxidation leads to functional and structural damages, as well as apoptosis, in spermatogenic cells of rats. Both LC and EA protected against the development of these effects 2015-06-18T11:12:50Z 2015-06-18T11:12:50Z 2011 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Sönmez, M., Türk, G., Çeribaşı, A., Sakin, F. ve Ateşşahin, A. (2011). Attenuating effect of lycopene and ellagic acid on 2,3,7,8-tetrachlorodibenzo-p-dioxin-induced spermiotoxicity and testicular apoptosis. Drug and Chemical Toxicology, 34(4), 347-356. http://hdl.handle.net/11508/8080 34 4 347;356 İngilizce Drug and Chemical Toxicology

oai:openaccess.firat.edu.tr:11508/80822017-11-30T16:29:27Zcom_11508_11907col_11508_11926

Relationship between seminal plasma arginase activity and semen quality in Saanen bucks Türk, G Gür, S Kandemir, Fm Sönmez, M Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Seminal plasma Semen quality Arginase activity Saanen goat This study was conducted to determine the relationship between seminal plasma arginase activity and spermatological parameters in bucks. In this study, 5 ejaculates were collected by artificial vagina from each of 5 Saanen bucks of proven fertility. Spermatological parameters (semen volume, semen pH, mass sperm activity, sperm motility and concentration and percentage abnormal sperm) were evaluated immediately after collection in each ejaculate. After semen collection, samples were centrifuged and stored at −20 ◦C for analysis of the arginase activity. The mean level seminal plasma arginase activity recorded was 0.87±0.12 units/mg protein. There existed a positive correlation between the seminal plasma arginase activity and sperm mass activity (r = 0.548, p < 0.01), sperm motility (r = 0.408, p < 0.05) and sperm concentration (r = 0.793, p < 0.01); However, a negative correlationwasrecorded between seminal plasma arginase activity and the percentage abnormal sperm (r =−0.427, p < 0.05). This study suggests that a significant correlation exists between seminal plasma arginase activity and certain spermatological parameters. Therefore, seminal plasma arginase activity may be used as a biochemical criterion to determine sperm quality in bucks. 2015-06-18T11:19:43Z 2015-06-18T11:19:43Z 2011 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Türk, G., Gür, S., Kandemir, F. ve Sönmez, M. (2011). Relationship between seminal plasma arginase activity and semen quality in Saanen bucks. Small Ruminant Research, 97(1-3), 83-87. http://hdl.handle.net/11508/8082 97 1-3 83;87 İngilizce Small Ruminant Research

oai:openaccess.firat.edu.tr:11508/80832017-11-30T16:29:30Zcom_11508_11907col_11508_11926

Rose oil inhalation protects against formaldehyde-induced testicular damage in rats Köse, E Sarsılmaz, M Taş, U Kavaklı, A Türk, G Dabak, Dö Sapmaz, H Ögetürk, M Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Formaldehyde Rat Rose oil Sperm Testes In this experimental study, harmful effects of formaldehyde (FA) inhalation on sperm concentration, sperm quality, serum testosterone levels and the rat testes were investigated. In addition, the possible protective effects of rose oil against to these harmful effects were evaluated. For this purpose, 21 albino-Wistar rats were used. The rats in Group I were used as control group. When the rats of Group II were exposed FA (10 ppm/1 h) for 35 days, the rats of Group III inhalated rose oil (1 ml/1 h) after FA. The epididymal tissues were taken for sperm analysing and the testes were removed for histological examination. In addition, testosterone levels were determined from the blood samples. Although the testosterone levels, the epididymal sperm concentration, and the progressive sperm motility significantly decreased, the abnormal sperm rate significantly increased in the Group II when compared to Group I. In the Group III, these damages were seen less. When the rats in the Group II compared with the control group, there were serious histological damages. In the Group III, it was determined that the histological changes were less than group II. It can be expressed that serious damages occurred via formaldehyde exposure in male reproductive system and that the rose oil had protective effects against these damages. 2015-06-18T11:30:59Z 2015-06-18T11:30:59Z 2012 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Köse, E., Sarsılmaz, M., Taş, U., Kavaklı, A., Türk, G. ve diğerleri. (2012). Rose oil inhalation protects against formaldehyde-induced testicular damage in rats. Andrologia, 44(Suppl 1), 342-348. http://hdl.handle.net/11508/8083 44 Suppl 1 342;348 İngilizce Andrologia

oai:openaccess.firat.edu.tr:11508/80842017-11-30T16:29:32Zcom_11508_11907col_11508_11926

Assessment of imidacloprid toxicity on reproductive organ system of adult male rats Bal, R Türk, G Tuzcu, M Yılmaz, Ö Kuloğlu, T Gündoğdu, R Gür, S Ağca, A Ulaş, M Çambay, Z Tuzcu, Z Naziroğlu, M Gençoğlu, H Güvenç, M Özşahin, Ad Kocaman, N Aslan, A Etem, E Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Imidacloprid neonicotinoids apoptosis testis sperm characteristics fatty acid composition In the current study it was aimed to investigate the toxicity of low doses of imidacloprid (IMI) on the reproductive organ systems of adult male rats. The treatment groups received 0.5 (IMI-0.5), 2 (IMI-2) or 8 mg IMI/kg body weight by oral gavage (IMI-8) for three months. The deterioration in sperm motility in IMI-8 group and epidydimal sperm concentration in IMI-2 and IMI-8 groups and abnormality in sperm morphology in IMI-8 were significant. The levels of testosterone (T) and GSH decreased significantly in group IMI-8 compared to the control group. Upon treatment with IMI, apoptotic index increased significantly only in germ cells of the seminiferous tubules of IMI-8 group when compared to control. Fragmentation was striking in the seminal DNA from the IMI-8 group, but it was much less obvious in the IMI-2 one. IMI exposure resulted in elevation of all fatty acids analyzed, but the increases were significant only in stearic, oleic, linoleic and arachidonic acids. The ratios of 20:4/20:3 and 20:4/18:2 were decreased and 16:1n-9/16:0 ratio was increased. In conclusion, the present animal experiments revealed that the treatment with IMI at NOAEL dose-levels caused deterioration in sperm parameters, decreased T level, increased apoptosis of germ cells, seminal DNA fragmentation, the depletion of antioxidants and change in disturbance of fatty acid composition. All these changes indicate the suppression of testicular function. 2015-06-18T11:40:15Z 2015-06-18T11:40:15Z 2012 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Bal, R., Türk, G., Tuzcu, M., Yılmaz, Ö., Kuloğlu, T. ve diğerleri. (2012). Assessment of imidacloprid toxicity on reproductive organ system of adult male rats. Journal of Environmental Science and Health-Part B, 47(5), 434-444. http://hdl.handle.net/11508/8084 47 5 434;444 İngilizce Journal of Environmental Science and Health-Part B

oai:openaccess.firat.edu.tr:11508/80852017-11-30T16:29:28Zcom_11508_11907col_11508_11926

Effects of clothianidin exposure on sperm quality, testicular apoptosis and fatty acid composition in developing male rats Bal, R Türk, G Yılmaz, Ö Etem, E Kuloğlu, T Baydaş, G Naziroğlu, M Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Apoptosis Clothianidin Fatty acid composition Neonicotinoids Sperm characteristics Testis Clothianidin (CTD) is one of the latest members of the synthetic organic insecticides, the neonicotinoids. In the present study, it was aimed to investigate if daily oral administration of CTD at low doses for 90 days has any deleterious effects on reproductive functions of developing male rats. Animals were randomly divided into four groups of six rats each, assigned as control rats, or rats treated with 2 (CTD-2), 8 (CTD-8) or 32 (CTD-32) mg CTD/kg body weight by oral gavage. The significant decreases of the absolute weights of right cauda epididymis and seminal vesicles, and body weight were detected in the animals exposed to CTD administration at 32 mg/kgBW/day. Epididymal sperm concentration decreased significantly in CTD-32 group and the abnormal sperm rates increased in CTD- 8 and CTD-32 groups when compared to control group. The testosterone level was significantly decreased in CTD-32 group when compared to control group. The administration of all CTD doses resulted in a significant decrease in the level of GSH. The number of TUNELpositive cells significantly increased in the germinal epithelium of testis of rats exposed to CTD at 32 mg/kgBW/day. In groups CTD-8 and CTD-32, only docosapentaenoic, arachidonic, palmitic and palmitoleic acids were significantly elevated when compared to control. The ratios of 20:4/18:2 and 18:1n−9/ 18:0 were decreased when rats exposed to CTD. Sperm DNA fragmentation was observed in CTD-32 group, but not CTD-2 and CTD-8. It is concluded that low doses of CTD exposure during critical stages of sexual maturation had moderate detrimental effects on reproductive organ system and more severe effects are likely to be observed at higher dose levels. In addition, the reproductive system may be more sensitive to exposure of CTD even earlier in development (prenatal and early postnatal), and therefore it could be expected that more severe effects could also be observed at the NOAEL dose levels, if dosing had occurred in utero or early postnatal. 2015-06-18T11:45:39Z 2015-06-18T11:45:39Z 2012 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Bal, R., Türk, G., Yılmaz, Ö., Etem, E., Kuloğlu, T. ve diğerleri. (2012). Effects of clothianidin exposure on sperm quality, testicular apoptosis and fatty acid composition in developing male rats. Cell Biology and Toxicology, 28(3), 187-200. http://hdl.handle.net/11508/8085 28 3 187;200 İngilizce Cell Biology and Toxicology

oai:openaccess.firat.edu.tr:11508/80862017-11-30T16:29:29Zcom_11508_11907col_11508_11926

Impact of ellagic acid on adriamycin-induced testicular histopathological lesions, apoptosis, lipid peroxidation and sperm damages Çeribaşı, Ao Sakin, F Türk, G Sönmez, M Ateşşahin, A Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ Adriamycin Ellagic acid Lipid peroxidation Testicular apoptosis Sperm characteristics The aim of the present study was to investigate whether ellagic acid (EA) has protective effect on adriamycin (ADR)-induced testicular and spermatozoal toxicity associated with the oxidative stress in male rats. Thirthy-two healthy 8-week-old male Sprague–Dawley rats were equally divided into four groups. The first (EA) group was treated with EA (2 mg/kg/every other day) by gavage. The second (ADR) group received ADR (2 mg/kg/once a week) intraperitoneally, while the combination of ADR and EA was given to the third (ADR + EA) group. The forth (control) group was treated with placebo. At the end of the 8- week treatment period, reproductive organ weights, epididymal sperm parameters, histopathological changes and apoptosis via Bax and Bcl-2 proteins, testicular tissue lipid peroxidation, and antioxidant enzyme activities, were investigated. ADR administration was determined to cause significant decreases in reproductive organ weights, epididymal sperm concentration and motility, plasma testosterone concentration, diameter of seminiferous tubules, germinal cell layer thickness, Johnsen’s testicular score and Bcl-2 positive antiapoptotic cell rate, wherease it caused significant increases in level of lipid peroxidation and glutathione, catalase activity, abnormal sperm rates and Bax positive apoptotic cell rates along with degeneration, necrosis, immature germ cells, congestion and atrophy in testicular tissue when compared with the control group. EA administration to ADR-treated rats provided significant improvements in ADR-induced disturbed oxidant/antioxidant balance, decreased testosterone concentration, testicular apoptosis and mild improvements in the histopathological view of the testicular tissue. However, EA failed to improve decreased reproductive organ weights and deteriorated sperm parameters due to ADR administration. It is concluded that while ADR has direct or indirect (lipid peroxidation) negative effects on sperm structure and testicular apoptosis in rats, EA has protective effects on ADR-induced testicular lipid peroxidation and apoptosis. 2015-06-18T11:49:46Z 2015-06-18T11:49:46Z 2012 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Çeribaşı, A., Sakin, F., Türk, G., Sönmez, M. ve Ateşşahin, A. (2012). Impact of ellagic acid on adriamycin-induced testicular histopathological lesions, apoptosis, lipid peroxidation and sperm damages. Experimental and Toxicologic Pathology, 64(7-8), 717-724. http://hdl.handle.net/11508/8086 64 7-8 717;724 İngilizce Experimental and Toxicologic Pathology

oai:openaccess.firat.edu.tr:11508/80872017-11-30T16:29:31Zcom_11508_11907col_11508_11926

Insecticide imidacloprid induces morphological and DNA damage through oxidative toxicity on the reproductive organs of developing male rats Bal, R Naziroğlu, M Türk, G Yılmaz, Ö Kuloğlu, T Etem, E Baydaş, G Fırat Üniversitesi Kütüphanesi::TIP BİLİMLERİ imidacloprid oxidative stress apoptosis testis fatty acids We investigated whether treatment with imidacloprid would induce morphological changes, DNA fragmentation, antioxidant imbalance and apoptosis in the reproductive system of developing male rats. Twenty-four male rats were included in this 90-day study, starting at 7 days of age. The rats were divided into four groups. The first group was used as control. The second, third and fourth groups received oral 0.5-, 2- and 8-mg/kg imidacloprid, respectively. Serum, spermand testis sampleswere collected fromall groups at the end of the experimental period. Theweights of the epididymis, vesicula seminalis, epididymal sperm concentration, body weight gain, testosterone and reduced glutathione values were lower in the imidacloprid-treated groups than that in the controls. All treated groups had increased lipid peroxidation, fatty acid concentrations and higher rates of abnormal sperm. Apoptosis and fragmentation of seminal DNA were higher in rats treated at the two higher doses of imidacloprid. These results show that this compound has a negative effect on sperm and testis of rats 2015-06-18T11:54:50Z 2015-06-18T11:54:50Z 2012 Makale - Bilimsel Dergi Makalesi - Çok Yazarlı Bal, R., Naziroğlu, M., Türk, G., Yılmaz, Ö., Kuloğlu, T. ve diğerleri. (2012). Insecticide imidacloprid induces morphological and DNA damage through oxidative toxicity on the reproductive organs of developing male rats. Cell Biochemistry and Function, 30(6), 492-499. http://hdl.handle.net/11508/8087 30 6 492;499 İngilizce Cell Biochemistry and Function oai_dc////100