Results 61 to 70 of about 651,503 (286)
Male scorpionflies assess the amount of rival sperm transferred by females' previous mates [PDF]
, 2007 Engqvist L. Male scorpionflies assess the amount of rival sperm transferred by females' previous mates. Evolution. 2007;61(6):1489-1494.Theory predicts that when sperm compete numerically, selection will favor males who vary the number of sperm they ...
Engqvist, Leif ; https://orcid.org/
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Advanced Science, EarlyView.This study unveils a novel antibacterial mechanism against MRSA, in which the compound Py‐27 selectively targets and inhibits aspartate transcarbamoylase (ATCase), a key enzyme in pyrimidine synthesis. This inhibition disrupts DNA replication, induces oxidative damage, leading to potent bactericidal activity.
Xiaorong Yang +11 more
wiley +1 more source
IGF2 and IGF1R mRNAs Are Detectable in Human Spermatozoa
The World Journal of Men's Health, 2020 Purpose: Oligozoospermia is highly prevalent worldwide. Studies have reported a lower methylation rate in the H19 differentially methylated region at the sperm level in oligozoospermic patients than in controls.
Rossella Cannarella +6 more
doaj +1 more source
Sperm competition and sperm length in shorebirds [PDF]
, 1999 We investigated how sperm morphology varies across 16 species of shorebirds in the Scolopacidae, Charadriidae, and Jacanidae. Sperm were significantly longer in nonmonogamous than in socially monogamous species.
Briskie, J V, Johnson, D D P
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Determinants of sperm transfer in the scorpionfly Panorpa cognata: male variation, female condition and copulation duration [PDF]
, 2003 Engqvist L, Sauer KP. Determinants of sperm transfer in the scorpionfly Panorpa cognata: male variation, female condition and copulation duration. Journal of Evolutionary Biology.
Sauer, Klaus Peter +1 more
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Advanced Science, EarlyView.SDF‐1 levels decline significantly with maternal aging. Exogenous supplementation restores meiotic spindle morphology, chromosomal alignment, and mitochondrial function while reducing oxidative stress in aged oocytes. Mechanistically, SDF‐1 enhances autophagic activity to clear accumulated stress granules, thereby rescuing fertilization competence and ...
Rui Long +12 more
wiley +1 more source
SPERMATOGENESIS INDICES IN INBRED STRAINS DD/HE AND BALB/CLAC AND THEIR F1 RECIPROCAL CROSSES
Вавиловский журнал генетики и селекции, 2014 We have shown that among 13 inbred mice strains males the DD/He strain has the lowest proportion of mobile sperm and moderate sperm count and proportion of abnormal sperm heads.
M. A. Kleshchev +2 more
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A Simple and Practical Method for Rat Epididymal Sperm Count (Rattus norvegicus)
Biology, Medicine & Natural Product Chemistry, 2015 Sperm sample from epididymal source can be determined its number using minimal amount of equipment. These method will aid researcher and practitioner in sperm quality analysis to determined sperm number rapidly and practically.
Muhammad Ja’far Luthfi
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Theoretical influence of female mating status and remating propensity on male sperm allocation patterns [PDF]
, 2006 Engqvist L, Reinhold K. Theoretical influence of female mating status and remating propensity on male sperm allocation patterns. JOURNAL OF EVOLUTIONARY BIOLOGY.
Reinhold, Klaus +3 more
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Advanced Science, EarlyView.Oocytes play crucial roles in maintaining ovarian fate in adult gonochoristic fish. Targeted oocyte ablation with aromatase inhibition triggers the activation of surviving germline stem cells and the transdifferentiation of somatic cells from granoulosa/theca to Sertoli/Leydig lineages, inducing a complete and functional female‐to‐male sex reversal ...
Yang Yang +6 more
wiley +1 more source