نتایج جستجو برای: spermatozoa motility

تعداد نتایج: 49150  

2014
J. M. Morrell A. Johannisson

The effect on sperm motility and chromatin integrity of adding homologous or heterologous equine seminal plasma (SP) to fresh stallion spermatozoa selected by single layer centrifugation (SLC) was studied. No statistical difference in mean progressive motility was seen after adding SP at time 0 h, although there were differences for individual stallions. The proportion of spermatozoa with high ...

2004
HENRY A. LARDY

Although work on the respiration of spermatozoa has been reported, investigators are not in agreement as to the significance of the oxidative processes, and the nature of the substances oxidized has not been established. Redenz (1) found that various carbohydrates promoted motility only if the sperm could produce lactic acid from them. He also showed that lactic acid had no influence on motilit...

Journal: :The Journal of reproduction and development 2003
Kenji Momozawa Yoshinori Fukuda

The purpose of this study was to examine: 1) whether caffeine in the fertilization medium under mineral oil is essential for bovine in vitro fertilization by fully capacitated spermatozoa, 2) the minimum concentration of caffeine that shows an adverse effect on the motility of preincubated spermatozoa. Cumulus-oocyte complexes with heterogeneous-appearing ooplasm were matured in in vitro cultur...

Journal: :تحقیقات دامپزشکی 0
خسرو حسینی پژوه پژوهشکده بیوتکنولوژی، سازمان پژوهش های علمی وصنعتی ایران، تهران–ایران پرویز تاجیک گروه علوم درمانگاهی، دانشکده دامپزشکی دانشگاه تهران، تهران–ایران مرتضی کریمی پور گروه پزشکی مولکولی، موسسه پاستور تهران، تهران–ایران مهدی بهدانی گروه پزشکی مولکولی، موسسه پاستور تهران، تهران–ایران سید مجتبی داودی دانش آموخته، دانشکده دامپزشکی دانشگاه تهران، تهران–ایران

background: as we all know, sperm has the capacity to take up foreign dna, therefore, sperm mediated gen transfer can be an inexpensive and simple method in animal transgenesis in various species. however, there is not sufficient evidence of dna uptake by ovine spermatozoa. objectives: the purpose of the present study was to examine the uptake of human lysozyme gene contained plasmid (pegfp-ire...

2016
Touqeer Ahmed Rafiqul Islam Farooz Ahmad Lone Asloob Ahmad Malik

AIM The aim of the study was to evaluate the effect of washing on the post-thaw quality of ram cauda epididymal spermatozoa (P1: Unwashed, P2: Washed). MATERIALS AND METHODS Fresh testicles of adult healthy slaughtered rams were collected and transported to the laboratory in an ice chest, where they were weighed, and cauda epididymides were separated. These cauda epididymides were used for re...

Journal: :Thorax 1994
N C Munro D C Currie K S Lindsay T A Ryder A Rutman A Dewar M A Greenstone W F Hendry P J Cole

BACKGROUND Primary ciliary dyskinesia is characterised by chronic rhinosinusitis, chronic bronchial sepsis (usually with bronchiectasis), dextrocardia in approximately 50% of cases, and male infertility. The latter, described in patients attending infertility clinics, results from immotile but viable spermatozoa. Experience in a respiratory clinic suggests that infertility in men is not invaria...

Journal: :European Journal of Obstetrics & Gynecology and Reproductive Biology 2021

ObjectiveMetabolomic profiling of seminal plasma has been suggested as a possible approach for fast and non-invasive male infertility evaluation diagnosis. However, metabolomics profiles in normozoospermic men have not thoroughly investigated, the influence ejaculation-abstinence described.To provide interim reference values find associations between human length period men.Study designSemen sa...

Journal: :Theriogenology 2004
Shuyang He Karen Jenkins-Keeran L Curry Woods

The objective of the present study was to identify the effect of osmolality, ions (K+, H+, Ca2+, Mg2+) and cAMP on the initiation of sperm motility in striped bass (Morone saxatilis). Striped bass spermatozoa remained motile in solutions isotonic to seminal plasma (350 mOsm/kg) until osmolality reached 600 mOsm/kg. K+ (0-100 mM) had no effect ( p>0.05 ) on sperm motility, and sperm displayed a ...

2012
Seong Kyu Park Jiwon Yoon Ling Wang Toshiaki K Shibata Khatereh Motamedchaboki Kyung Jun Shim Mun Seog Chang Seung Ho Lee Naoaki Tamura Shingo Hatakeyama Daita Nadano Kazuhiro Sugihara Michiko N Fukuda

BACKGROUND Trophinin is an intrinsic membrane protein that forms a complex in the cytoplasm with bystin and tastin, linking it microtubule-associated motor dynein (ATPase) in some cell types. Previously, we found that human sperm tails contain trophinin, bystin and tastin proteins, and that trophinin-binding GWRQ (glycine, tryptophan, arginine, glutamine) peptide enhanced motility of human sper...

Journal: :The Journal of biological chemistry 1977
M Chulavatnatol A Haesungcharern

The adenylate energy charge of human ejaculated spermatozoa was studied when the sperm motility was perturbed by varying pH, prolonged incubation, and caffeine. Between pH 8 and 9, which was optimal for the sperm motility, the energy charge was in the physiological range of 0.8 to 0.9. Above pH 9, the mobility, ATP content, and adenine nucleotide pool declined rapidly but the energy charge was ...

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