Alper Kocyigit

Ondokuz Mayıs Üniversitesi

The use of biomodels is prevalent across multiple educational disciplines, with a particular emphasis on their utilization in teaching the anatomy of organs. These tools have not only enriched education, but have also provided an alternative to the ethical and cultural controversies, increased costs, and health and safety risks associated with the...

Today, conventional teaching methods are losing their effectiveness at transferring knowledge and skills, prompting the presentation of alternative strategies that hold more promise. One of the innovative alternative education materials in veterinary anatomy education is the models produced on three-dimensional (3D) printers. The subject of this st...

This study aimed to investigate the potentiality of biomodels to be produced as alternative tools to slaughterhouse materials in andrology education. For this purpose, testis biomodels were produced with reference to bull testes. The biomodel production was carried out by the following steps: the preparation of the reference organs, 3D modelling, a...

Bu çalışmada Kangal Akkaraman koçlarının androlojik özelliklerinin incelenmesi, bu özelliklerin mevsimle ilişkisinin araştırılması amaçlandı. Bu amaçla dokuz adet Kangal Akkaraman koçunda testis ölçüleri belirlendi. Hayvanlardan elektro-ejakulatör yöntemiyle sperma alındı. Ayrıca kan alınarak serum testosteron ve çinko seviyeleri araştırıldı. Koçla...

The objective of this article was to investigate the efficiency of GnRH administrations at different time points after induced luteolysis on pregnancy rates in low-yielding subfertile cows. One thousand six hundred and ten healthy and subfertile dairy cows of different ages and races were used in this study. Cows were randomly divided into 4 groups...

Successful preservation of semen is also important to improve the results of the main artificial reproductive techniques (ARTs), such as in vitro fertilization and, most commonly, AI. Semen cryopreservation eases the transport and exchangeability of genetic material across short or long distances, contributing effectively to widen the restricted ge...

The aim of this study was to compare the efficacy of estrus induction and fertility by using subcutaneous melatonin (MEL, T1) and short-term intravaginal medroxyprogesteronacetate plus pregnant mare serum gonadotropin treatments (sMAP+eCG, T2) in ewes on seasonaly anestrus. In this study, 105 mature clinically healthy Kivircik ewes in anestrus seas...

This study examined the effect of melatonin implantation during the non-breeding season on the reproductive performance of ewes and the testicular dimensions of rams. In seasonally anestrus Kivircik and Charollais ewes and rams were subjected to melatonin. Estrus response was significantly higher in treated than control ewes of both breeds (p<0.001...

This study was conducted to investigate the effects of melatonin implantation on basic testicular characteristics and reproductive performance of Kivircik and Charollais rams and ewes during the non-breeding season. In this study, 8 Kivircik and 6 Charollais rams were used. Rams were implanted with 54 mg melatonin according to the manufacturer's in...

Effects on testicular measurements and sexual performance of Kivircik and Charollais rams treated with melatonin out of the breeding season

The selection of quality embryos is a prerequisite of cryopreservation process. Present study was conducted to examine the correlation between the diameter and cryotolerance, on the cell number of the cryopreserved embryos. The blastocyst stage embryos were collected at culture days 7-9, evaluated morphologically under a microscope and divided acco...

Effects of Leukemia Inhibitory Factor on Cell Allocation of Vitrified Bovine Embryos

The present study examined the developmental capacity and cryotolerance of cultured bovine embryos in defined media (synthetic oviduct fluid, SOF) supplemented with insulin-like growth factor I (IGF-I) and leukemia inhibitor factor (LIF). The objectives of the present study were: (1) to examine the effects IGF-I and LIF on bovine embryo development...

This study was conducted to determine the effects of different macromolecule sources added to synthetic oviduct fluid (SOF) culture medium supplemented with growth factors on development of bovine embryos and blastocyst morphology. Zygotes were distributed into 5 treatment groups. Cleavage, morula, and blastocyst rates were evaluated under a stereo...

This study was conducted to determine the effects of different macromolecule sources added to synthetic oviduct fluid (SOF) culture medium supplemented with growth factors on the development of bovine embryos and blastocyst morphology. Zygotes were distributed into 5 treatment groups. Cleavage, morula, and blastocyst rates were evaluated under a st...

The aim of the study was to investigate potential use of sequential human embryo culture media in culture of bovine embryos. Bovine oocytes were matured in Tissue Culture Medium-199 (TCM-199) for 22 h at 38.5 degrees C and fertilized in modified Tyrode-Albumine-Lactate-Pyruvate medium (mTALP). The putative zygotes were randomly allocated to two emb...

The effects of exogenous protein sources on the developmental competence of bovine embryos in vitro The aim of this study was to investigate the effect of exogenous protein sources (bovine serum albumin; BSA, fetal calf serum; FCS and polyvinyl-alcohol; PVA) on the developmental competence of bovine embryos in vitro. For this purpose, bovine cumulu...

The aim of the study was to evaluate the effects of follicle stimulating hormone (FSH), luteinizing hormone (LH), epidermal growth factor (EGF) and estradiol 17-β (E2) in maturation medium on nuclear maturation and cumulus expansion of cumulus-oocyte complexes (COCs) obtained from bovine ovaries. COCs were classified as good and poor quality grades...

The aim of the study was to evaluate the effects of follicle stimulating hormone (FSH), luteinizing hormone (LH), epidermal growth factor (EGF) and estradiol 17-β (E2) in maturation medium on nuclear maturation and cumulus expansion of cumulus-oocyte complexes (COCs) obtained from bovine ovaries. COCs were classified as good and poor quality grades...

The aim of the study was to evaluate the effects of follicle stimulating hormone (FSH), luteinizing hormone (LH), epidermal growth factor (EGF) and estradiol 17-β (E2) in maturation medium on nuclear maturation and cumulus expansion of cumulus-oocyte complexes (COCs) obtained from bovine ovaries. COCs were classified as good and poor quality grades...

Apoptosis is a process of programmed cell death that plays a critical role in some normal and pathologic conditions beginning from embryologic development and ends at death. Apoptosis is a fundamental mechanism in follicular atresia and postovulatory regression in mammals. In the ovary, apoptosis is the cellular mechanism removing all but few growi...