Sperm for viability

Queen failure is a persistent problem in beekeeping operations, but in the absence of overt symptoms it is often difficult, if not impossible, to ascertain the root cause. Stressors like heat-shock, cold-shock, and sublethal pesticide exposure can reduce stored sperm viability and lead to cryptic queen failure.

12p vijeeni2711 30-06-2021 11 1   Download

Flow cytometry based evaluation of sperm parameters is advantageous over the traditional microscope based evaluation. Many sperm parameters can be measured within short time period and with high accuracy. For this study, semen from six Jersey crossbred bull were collected. Semen parameters like sperm for viability and acrosomal integrity were analyzed by flow cytometry.

7p gaocaolon9 22-12-2020 16 2   Download

A study was carried out on semen of nine healthy mature breeding bulls (3 each of Gir, Surti and Murrah breed) to evaluate the correlations of their fresh sperm quality attributes to those of frozen thawed semen assessed both by subjective method and objective technique using Biovis CASA. The ejaculates immediately after collection were evaluated for routine seminal attributes.

10p kethamoi5 03-06-2020 14 0   Download

Present study was undertaken to evaluate the anti-apoptotic effect of LEHD-FMK (caspase inhibitor) on buffalo bull sperm before and after semen freezing. Tris egg yolk extender was treated with Z-LEHD-FMK (0, 2, 4, 6, 10 and 20 µM) and used for extension of six aliquots of semen from each ejaculate to final concentration of 80 million sperm/ml. Sperm samples were analyzed for sperm motility, viability, plasma membrane integrity, mitochondrial membrane potential and PLA (Phospholipase) activity at pre-freeze and post thaw stages.

9p trinhthamhodang1213 30-05-2020 18 1   Download

The laboratory examination of semen quality parameters is an indirect way of assessing male fertility. The objective of this research was to study the semen quality parameters of Large White Yorkshire (LWY) boar ejaculates, which had the minimum sperm progressive motility necessary for being selected for further processing. The pigs were maintained at the Centre for pig production and research, Mannuthy, Kerala. A total of 24 ejaculates were collected from seven boars using gloved hand technique.

7p caygaocaolon3 09-03-2020 15 1   Download

Semen cryopreservation is a widely used technique across the world for conservation and proliferation of genetically superior germplasm through artificial insemination. Artificial insemination (AI) is the most conclusive tool to increase genetic improvement, control of venereal diseases and improve herd performance and productivity. For achieving the mission, successful and effective cryopreservation of semen is essential.

18p nguaconbaynhay1 04-12-2019 33 0   Download

The past three decades have witnessed significant advances in the field of assisted human conception. Following the remarkable perseverance and triumph of Robert Edwards, Patrick Steptoe, and Jean Purdy, numerous scientists and physicians from around the world have worked to develop more effective and safer procedures to treat infertile couples.

459p socolanong 23-04-2012 105 12   Download