Results 21 to 30 of about 216,536 (392)

New Biological Insights on X and Y Chromosome-Bearing Spermatozoa

open access: yesFrontiers in Cell and Developmental Biology, 2020
A spermatozoon is a male germ cell capable of fertilizing an oocyte and carries genetic information for determining the sex of the offspring. It comprises autosomes and an X (X spermatozoa) or a Y chromosome (Y spermatozoa).
M. S. Rahman, M. Pang
semanticscholar   +1 more source

The relationship between seminal plasma aspartate aminotransferase activity, sperm osmotic resistance test value, and semen quality in boars [PDF]

open access: yesActa Veterinaria, 2013
The relationship between the activity of aspartate aminotransferase (AspAT) in seminal plasma and the values of the osmotic resistance test (ORT) of acrosomal membranes and semen traits was examined on 120 young hybrid Pietrain and Duroc boars.
Jacyno Eugenia   +5 more
doaj   +1 more source

Location of aquaporins 3, 7 and 10 in frozen-thawed ejaculated and cauda epididymal spermatozoa from the Iberian ibex, mouflon, and chamois

open access: yesTheriogenology Wild, 2023
Spermatozoa collected from the cauda epididymis of wild ruminants are more cryoresistant than ejaculated spermatozoa. Changes in the membrane location of aquaporins (AQPs) follow the osmotic changes that occur during freeze-thawing, and might influence ...
Belén Pequeño   +11 more
doaj   +1 more source

A comparative study of cryodamages of boar spermatozoa frozen with conventional liquid nitrogen vapour freezing method

open access: yesIndian Journal of Animal Sciences, 2014
The objective of the present study was to quantify the various cryodamages that boar spermatozoa undergo following freezing with conventional liquid nitrogen vapour freezing method.
S K BAISHYA   +5 more
doaj   +1 more source

Kualitas semen dan produksi semen beku pada bangsa sapi dan bulan penampungan yang berbeda

open access: yesJurnal Ilmu-Ilmu Peternakan, 2015
The purpose of this research was to determine semen quality and frozen semen production of beef cattle at different month collection in Lembang Artificial Insemination Center.
Mita Ayu Rahmawati   +2 more
doaj   +1 more source

Increased frequency of aneuploidy in long-lived spermatozoa. [PDF]

open access: yesPLoS ONE, 2014
Aneuploidy commonly causes spontaneous abortions, stillbirths, and aneuploid births in humans. Notably, the majority of sex chromosome aneuploidies in live births have a paternal origin.
Young-Ah You   +6 more
doaj   +1 more source

Epigenetic Alterations in Cryopreserved Human Spermatozoa: Suspected Potential Functional Defects

open access: yesCells, 2022
Background: Gene set enrichment analysis (GSEA) was conducted on raw data, and alternative splicing (AS) events were found after mRNA sequencing of human spermatozoa.
Wanxue Wang   +7 more
doaj   +1 more source

Exceptional sperm cooperation in the wood mouse [PDF]

open access: yes, 2002
Spermatozoa from a single male will compete for fertilization of ova with spermatozoa from another male when present in the female reproductive tract at the same time.
AH Harcourt   +32 more
core   +1 more source

Chemotaxis of Arbacia punctulata spermatozoa to resact, a peptide from the egg jelly layer [PDF]

open access: yes, 1985
Resact, a peptide of known sequence isolated from the jelly layer of Arbacia punctulata eggs, is a potent chemoattractant for A. punctulata spermatozoa. The chemotactic response is concentration dependent, is abolished by pretreatment of the spermatozoa ...
Brokaw, Charles J.   +3 more
core   +3 more sources

Modulation of the asymmetry of sea urchin sperm flagellar bending by calmodulin [PDF]

open access: yes, 1985
Sea urchin spermatozoa demembranated with Triton X-100 in the presence of EGTA, termed potentially asymmetric, generate asymmetric bending waves in reactivation solutions containing EGTA. After they are converted to the potentially symmetric condition by
Brokaw, C. J., Nagayama, S. M.
core   +2 more sources

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