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63 articles for “Semen”

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Research ArticleOpen accessIn the keywordsInfluence of Different Freezing Curves on the Acrosome Integrity of Male Goat Sperm CellsSofia Alexandra Fagundes Lopes, Henrique José Duarte Rosa, António Chaveiro, Fernando Moreira da SilvaThe aim of the present study was to evaluate the effect of three different freezing curves on male goat’s sperm viability and acrosome integrity. Semen was collected on three adult male goats in February (Azores, Portugal, latitude 38°39′N) using an artificial vagina and a female with induced heat. Three collection sessions were spaced of approximately 5 days. The study followed … …American Journal of Animal and Veterinary Sciences, Vol. 16, Issue 1 · 19 Feb 2021 · 6,616 accessesView PDFCite
Research ArticleOpen accessIn the keywordsEffect of Repeated Freezing and Thawing on Nguni Sperm Parameters Evaluated by Computer Assisted Sperm Analyzer SystemMasindi Lottus Mphaphathi, Tshimangadzo Lucky NedambaleThe aims of the current study were to assess the effect of double freezing and thawing on Nguni semen parameters. Semen was collected from Nguni bulls. The Sperm Class Analyzer® system was used to evaluate sperm motility rates prior and post freezing, repeatedly. Semen samples were diluted with egg yolk citrate extender. Cooled semen samples were loaded into straws and … …American Journal of Animal and Veterinary Sciences, Vol. 16, Issue 1 · 27 Jan 2021 · 6,591 accessesView PDFCite
Research ArticleOpen accessIn the keywordsKinetic Motilities of Cryopreserved Bull Spermatozoa: Owing to the Effect of Eurycoma longifolia Jack Aqueous ExtractFalah Hasan Baiee, Abd Wahid Haron, Rosnina Haji Yusoff et al.This study was carried out to improve the kinetic motilities of frozen-thawed bull semen diluted with tris-based egg yolk diluent that was supplemented with Eurycoma longifolia jack aqueous extract. A total of 24 ejaculates were obtained from six cross-bred bulls using an electro-ejaculator. The extract of Eurycoma longifolia jack was distributed into three low doses and three high doses; cryopreserved … …American Journal of Animal and Veterinary Sciences, Vol. 12, Issue 2 · 16 Jun 2017 · 8,635 accessesView PDFCite
Research ArticleOpen accessIn the keywordsDetermination of Breeding Seasonality in Rusa Deer (Rusa timorensis) Stags via Serum Testosterone ProfilingWan Nor Fitri Wan Jaafar, Abd Wahid Haron, Rosnina Hj Yusoff et al.Breeding seasonality in mammals is influenced by the environmental changes and the endocrine response of the animals to that changes. Comprehension in breeding seasonality enables better reproductive management consequently maximizing the reproductive potential of the stags. Despite that, the study in breeding seasonality in Rusa deer (Rusa timorensis) is still scarce. Five healthy and matured stags were selected for this … …American Journal of Animal and Veterinary Sciences, Vol. 12, Issue 1 · 19 Mar 2017 · 8,608 accessesView PDFCite
Literature ReviewOpen accessIn the keywordsPhenotypic, Reproductive and Genomic Perspectives on the Status and Research Gaps of South African Bosvelder SheepNhlakanipho Sam Zulu, Khoboso Christine Lehloenya, Khanyisile Hadebe et al.The South African Bosvelder sheep is an emerging composite sheep developed from indigenous Bapedi and commercial White Dorper and Van Rooy sheep. Despite its reported adaptability and production potential under bushveld conditions, the sheep remains scientifically under-characterized and is not formally recognized within national breeding frameworks. This narrative review evaluates the current state of knowledge regarding phenotypic, reproductive, and genomic … …American Journal of Animal and Veterinary Sciences, Vol. 21, Issue 2 · 1 Jul 2026 · 1,242 accessesView PDFCite
Literature ReviewOpen accessIn the keywordsA Review on Effects of Bisphenol a on Reproductive, Endocrine Systems and its Influencing MechanismGanghui Ye, Liting Zheng, Chang Meng et al.Background and purpose: Bisphenol A (BPA) is a pervasive environmental toxicant with known adverse effects on human immune system and nervous system et al. Although, BPA is widely known to affect endocrine function in animals, the linkage between human exposure to BPA and human reproductive function is still not clearly clarified. Results: Systematic review of all articles about BPA and … …American Journal of Biochemistry and Biotechnology, Vol. 17, Issue 4 · 3 Dec 2021 · 6,511 accessesView PDFCite
Research ArticleOpen accessIn the author namesProduction, Yield and Derivatives of Volatile Oils from Eastern Redcedar (Juniperus Virginiana L.)Elif Semen, Salim HizirogluEastern redcedar (Juniperus virginiana L.) is one of the most widely distributed indigenous conifers in southern states including Oklahoma, Arkansas and Texas. Eastern redcedar is also an important source of the volatile oils. This specie adversely influences the environment resulting in degrading grassland, displacement of native plant population and increasing wildlife hazard. Range-grown eastern redcedar has a poor quality. However, … …American Journal of Environmental Sciences, Vol. 1, Issue 2 · 30 Jun 2005 · 6,754 accessesView PDFCite
Research ArticleOpen accessIn the author namesCulture and Religion Meaning-Making Coping Strategies in Wartime: Insights from a Qualitative Study on the Coping Experiences of UkrainiansFereshteh Ahmadi, Nataliia Melnyk et al.This study explores how Ukrainians use religious and spiritual meaning-making coping strategies during the ongoing war, shaped by cultural traditions, historical experiences, and personal circumstances. Its aim is to deepen understanding of culturally relevant resilience mechanisms in extreme adversity. Using a qualitative design, 67 semi-structured interviews were conducted across diverse Ukrainian regions between January 2024 and June 2025. Participants varied … …Journal of Social Sciences, Vol. 22, Issue 1 · 8 May 2026 · 2,435 accessesView PDFCite
Research ArticleOpen accessIn the author namesEidonomy of Apis mellifera Workers and Drones in ApiariesAnuarbek Temirbekovich Bissembayev, Natalia Evgenievna Zemskova, Vener Nurullovich Sattarov et al.In modern ecosystems, the increasing anthropogenic load, the absence or an insufficient number of scientifically based integrated programs and measures for the reproduction and distribution of local bee populations, as well as the preservation of their habitat territories; unsystematic hybridization leads to the transformation of the quantitative and qualitative composition of bees in the regions. In connection with the presented … …OnLine Journal of Biological Sciences, Vol. 23, Issue 2 · 16 Mar 2023 · 5,110 accessesView PDFCite
Research ArticleOpen accessIn the author namesComparative Assessment of Meat Quality Characteristics of Cattle Depending on Breed, Age and Growing Conditions in the Republic of KazakhstanGulzat Oraz, Asan Ospanov, Urishbay Chomanov et al.The results of meat productivity of young cattle of beef breeds (Auliekol, Kazakh Whitehead, Galloway, Hereford) depending on the breed, sex, and age (young bulls, steers-calves, heifers, first-calf cows, adult cattle-cows, bulls, calves) grown in the Western Region of the Republic of Kazakhstan during winter, turning winter (pre-spring), early spring and spring periods are given. The animals were divided into … …OnLine Journal of Biological Sciences, Vol. 22, Issue 2 · 19 May 2022 · 6,940 accessesView PDFCite