Results 41 to 50 of about 138,467 (157)
Biosensors, 2022 Routine assessment of sperm DNA integrity involves the time-consuming and complex process of staining sperm chromatin. Here, we report a Raman spectroscopy method combined with extended multiplicative signal correction (EMSC) for the extraction of ...
Shengrong Du +9 more
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Behavior of Male Gamete Fusogen GCS1/HAP2 and the Regulation in Arabidopsis Double Fertilization
Biomolecules, 2023 In the sexual reproduction of flowering plants, two independent fertilization events occur almost simultaneously: two identical sperm cells fuse with either the egg cell or the central cell, resulting in embryo and endosperm development to produce a seed.
Yuka Shiba +7 more
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Relation of the male gametes with embryo sec cells. The hypothesis of double fertilization
Acta Societatis Botanicorum Poloniae, 2014 The sperms one after another get out of synergids. The front sperm gets the first into the egg cell attraction zone and then the sperm comes into contact with egg membrane.
N. S. Belayeva
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Actin in Ejaculated Human Sperm Cells [PDF]
Biology of Reproduction, 1985 Previous studies have identified an "actin-like" protein in human sperm by indirect immunofluorescence microscopy with various probes, but no real biochemical confirmation of actin was made. In this study, two-dimensional (2-D) gels of Nonidet P-40 (NP-40) extracts of purified human sperm cells revealed a protein with appropriate pI and molecular ...
D, Ochs, D P, Wolf
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The geometry and motion of nematode sperm cells [PDF]
Cell Motility, 2009 AbstractThe nematode sperm cell crawls by recycling major sperm protein (MSP) from dimers into subfilaments, filaments, and filament complexes, as a result of thermal writhing in the presence of hydrophobic patches. Polymerization near leading edges of the cell intercolates MSP dimers onto the tips of growing filament complexes, forcing them against ...
Evgeny, Demekhin +6 more
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AN AUTOMATIC SYSTEM FOR CALCULATING BASIC SEMEN PARAMETERS
TASK Quarterly, 2004 Algorithms for examination of the density and selected parameters of movement of sperm cells have been elaborated and implemented. The conducted research is a part of work on a computer system for semen analysis. The system will allow for an increase in
ŁUKASZ WITKOWSKI
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The male germ unit association is independently regulated of GUM in Arabidopsis thaliana
Plant DirectCytoplasmic projections (CPs) formed by the generative and sperm cells link the male gametes with the vegetative cell (VC) nucleus, which are required to build the male germ unit (MGU) assemblage in the angiosperm pollen grain.
Abdur Rauf +9 more
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Architecture of the sperm cell of Psilotum [PDF]
American Journal of Botany, 2001 In this correlated SEM (scanning electron microscope) and TEM (transmission electron microscope) investigation, we describe architectural details of the multiflagellated sperm cell of Psilotum nudum. Comparisons with other pteridophytes are made to (1) assess the placement of Psilotum among pteridophyte taxa and (2) evaluate structural modifications of
K S, Renzaglia +3 more
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Frontiers in Physiology, 2020 Endometriosis is a local pelvic inflammatory process, frequently associated with infertility, with altered function of immune-related cells in the peritoneal environment.
Violetta Borelli +12 more
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Microscopy of Physcomitrella patens sperm cells [PDF]
Plant Methods, 2017 Archegoniates (bryophytes, ferns and gymnosperms), such as the moss Physcomitrella patens, possess freely motile sperm cells (spermatozoids) which reach the egg cell via surface water. Although these motile flagellated sperm cells are a traditional botanical subject, they have not been thoroughly analysed in the flagship non-seed plant model species P.
Nelly A. Horst, Ralf Reski
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