نتایج جستجو برای: semen motility
تعداد نتایج: 49657 فیلتر نتایج به سال:
The objective of this study was to investigate the effect of different levels of L-Carnitine on Ghezel ram semen characteristics after freeze-thawing. Semen samples were collected from 5 healthy and mature rams using an artificial vagina. Different concentrations of 35, 70, 105, mM L-Carnitine were diluted with lecithin-based semen extender and cooled to 5°C and then placed in liquid nitrogen v...
The objective of this study was to investigate the effect of different levels of glycerol on Dallagh rams semen characteristics in pre and post freezing conditions. Semen samples were collected from 4 healthy and mature rams using an electro ejaculator, were mixed with Tris extender in a ratio of 1:4 semen and assessed at 5°c. 0.5 ml of straws were filled with diluted semen and kept above liqui...
The Aim: aim of the study was to investigate applicability an up-to-date method, sperm selection with nanoparticles at different temperatures (37ºC, 21ºC, and 4ºC), on Angora buck semen. Material Methods: Semen samples were collected from 3 bucks 7 repetitions each sample diluted divided into 4 groups. Nanopurification procedure applied by using a nanoparticle dose 10 μg/ml three groups 37ºC, 4...
The aim of current study was to investigate the changes in the quality parameters of Holstein bull semen during the heat stress and the effect of feeding a source of omega-3 fatty acids in this period. Samples were obtained from 19 Holstein bulls during the expected time of heat stress in Iran (June to September 2009). Control group (n=10) were fed a standard concentrate feed while treatment gr...
The survivability of caprine spermatozoa was compared in semen extenders prepared from the conventional egg-yolk citrate and goat-milk citrate. Motility was comparable in both sets of extenders during the first 24 hours post-extension when extended ejaculates were stored at either room temperature (28 O C) or refrigerator temperature (5 O C). Motility in goat milk citrate extenders at 5 O C was...
Background: Many studies are being conducted to improve the quality of bull sperm in storage conditions. It seems that increasing sperm membrane unsaturated fatty acids can enhance sperm quality. This study was aimed to investigate the effects of combination of omega- 3, 6, 9 fatty acids on characteristics of bovine chilled semen. Materials and Methods: Different levels of oil containing omega-...
Semen extenders are liquid diluents that buffer sperm cells and preserve their fertilizing potentials. The commercial carbonated drink (CD) as an extender was evaluated on semen characteristics, fertility hatchability in Yoruba ecotype chickens (YECs). fructose of the CD 1.52?0.05 mg/ml. Under conditions 370Celsius, 5% 10% were added to egg yolk citrate solution make 100%. obtained from ten mat...
The purpose of this study was to find out how the semen quality pesisir cattle after addition trehalose egg yolk tris diluent. research material in form fresh obtained from aged approximately 4 years and had been tested by observing before dilution.. This used a randomized block design with treatments replications. treatment given consisted control, 0.5%, 1%, 1.5%. variables included motility, ...
Purpose: Glycerol has been the most widely used cryopreservation agent for spermatozoa and a wide range of factors affects its action on sperm viability and fertilizing capacity. Moreover egg yolk is a common constituent of semen diluents, protects the spermatozoa against cold shock and confers protection during freezing and thawing .The aim of this study was to investigate of different glycero...
Purpose: Semen freezing is an important technique in human infertility treatment in many different patients but it damages sperms. Low-power lasers are physical agents that have biostimulatory effects. In this study, low-power helium-neon laser's (16J/cm2, one time irradiation) effect on motility and ultrastructure of fresh and frozen-thawed human sperm were studied. Materials and Methods: Thi...
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