نتایج جستجو برای: as a trail and evaluating different semen extenders to improve sperm quality after freeze
تعداد نتایج: 21738445 فیلتر نتایج به سال:
The purpose of the present study was to assess the effect of modified camel milk (MCAM) and skim cow milk (SCOM) on semen quality of INRA180 and Boujaâd ram breeds, stored at 15°C for up to 24 hours. Semen samples were collected from eleven mature rams (6 from INRA180 and 5 from Boujaâd rams) and extended in SCOM vs MCAM, to reach a final concentration of 0.8×109 spermatozoa/mL, and stored at 1...
The objective of this study was to assess the sperm membrane integrity in extended boar semen during storage time using specific spectrum laboratory methods. Boar semen was diluted with the long-term liquid commercial extenders Androhep (A), Androstar (AS), Androstar plus (AS+), LD and M III and was stored up to 96 h. The sperm membrane integrity was evaluated by motility, viable spermatozoa, s...
terms of address as an important linguistics items provide valuable information about the interlocutors, their relationship and their circumstances. this study was done to investigate the change route of persian address terms in the two recent centuries including three historical periods of qajar, pahlavi and after the islamic revolution. data were extracted from a corpus consisting 24 novels w...
in this thesis, we exploit a simple and suitable method for immobilization of copper(ii) complex of 4?-phenyl-terpyridine on activated multi-walled carbon nanotubes [amwcnts-o-cu(ii)-phtpy]. this nanostructure was characterized by various physico-chemical techniques. to ensure the efficiency and fidelity of copper species, the implementation of three-component strategies in click-chemistry all...
Background Cryopreservation of semen requires optimized conditions to minimize the harmful effects of various stresses. The main approach for protection of sperm against stress is based on the use of antioxidants and cryoprotectants, which are described as defensive methods. Recently, the application of controlled mild stressors has been described for activation of a temporary response in oocyt...
the purpose of this study was to determine the effects of different concentrations of vitamin e (vit. e) in the quality of preserved stallion semen at 5ᵒc for a period of 48 h. semen was collected and most (≥90%) seminal plasma removed by centrifugation at 600 × g. pooled samples divided in four equal parts and diluted with extenders that was supplemented with different concentrations of vit. e...
iv abstract this study examined the linguistic behaviors of two iranian efl teachers each of them teaching learners of two similar proficiency levels, a beginner level and an intermediate level, to investigate the relationship between the learners proficiency levels and the amounts and purposes for l1 use by the two teachers. the study was carried out to investigate whether there were differe...
1. to determine whether difference in birth body mass influenced growth performance in pipistrellus kuhlii we studied a total of 12 captive-born neonates. bats were assigned to two body mass groups: light birth body mass (lbw: 0.89 ± 0.05, n=8) and heavy birth body mass (hbw: 1.35 ± 0.08, n=4). heavier body mass at birth was associated with rapid postnatal growth (body mass and forearm length) ...
The primary cause of sperm quality decline during the freeze-thaw pathway is peroxidation hazard caused by reactive oxygen species produced biological molecules sperm. Ascorbic acid (Vitamin C) and lycopene are two potent antioxidants that operate to prevent oxidation processes. This study aimed analyse effects ascorbic on motility, viability, abnormality plasma membrane integrity post-thawed S...
This study was carried out to investigate effects of copper sulphate (CuSO4) additive to semen extenders on sperm parameters: progressive motility, viability, membrane integrity and DNA damage, after semen dilution and cryopreservation. Semen samples of 5 buffalo bulls of 3-5 years old were collected at 5 different occasions during the autumn 2011. A total number of 25 samples were u...
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