Results 21 to 30 of about 273,320 (297)
Sperm Cells of a Primitive Strepsipteran [PDF]
Insects, 2013 The unusual life style of Strepsiptera has presented a long-standing puzzle in establishing its affinity to other insects. Although Strepsiptera share few structural similarities with other insect orders, all members of this order share a parasitic life style with members of two distinctive families in the Coleoptera—the order now considered the most ...
Nardi, J +5 more
openaire +4 more sources
Veterinary Sciences, 2022 After the copulation process, some sperm start the long journey with an ultimate goal of fertilizing the oocyte. Inside the oviduct, sperm are stored, waiting for the ovulated oocyte where they bind to the apical surface of the oviduct cells, which in ...
Mohamed M. M. El-Sokary +2 more
doaj +1 more source
Collective dynamics of sperm cells
Philosophical Transactions of the Royal Society B: Biological Sciences, 2020 While only a single sperm may fertilize the egg, getting to the egg can be facilitated, and possibly enhanced, by sperm group dynamics. Examples range from the trains formed by wood mouse sperm to the bundles exhibited by echidna sperm. In addition, observations of wave-like patterns exhibited by ram semen are used to score prospective sample fertility
Simon F. Schoeller +2 more
openaire +3 more sources
Use of FTA® classic cards for epigenetic analysis of sperm DNA
BioTechniques, 2018 FTA® technologies provide the most reliable method for DNA extraction. Although FTA technologies have been widely used for genetic analysis, there is no literature on their use for epigenetic analysis yet.
Olga Serra +4 more
doaj +1 more source
Progesterone significantly enhances the mobility of boar spermatozoa [PDF]
, 2013 Progesterone released from the cumulus cells of the oocyte causes a number of physiological responses in human sperm cells including hyperactivation, acrosome reaction and chemotaxis. We employed a validated sperm mobility assay, which involves measuring
Adya, Ashok K. +6 more
core +3 more sources
Isolating Sperm from Cell Mixtures Using Magnetic Beads Coupled with an Anti-PH-20 Antibody for Forensic DNA Analysis. [PDF]
PLoS ONE, 2016 Vaginal swabs taken in rape cases usually contain epithelial cells from the victim and sperm from the assailant and forensic DNA analysis requires separation of sperm from these cell mixtures.
Xing-Chun Zhao +5 more
doaj +1 more source
Optical Tweezers as an Effective Tool for Spermatozoa Isolation from Mixed Forensic Samples [PDF]
, 2019 A single focus optical tweezer is formed when a laser beam is launched through a high numerical aperture immersion objective. This objective focuses the beam down to a diffraction-limited spot, which creates an optical trap where cells suspended in ...
Auka, Nicole +6 more
core +4 more sources
Animals, 2022 The roughscale sole, Clidoderma asperrimum is categorized as an endangered species. Sperm freezing is essential for preserving gametes. This study examined the CPA concentration, diluent, dilution ratio, and thawing temperature to design a sperm ...
Irfan Zidni +7 more
doaj +1 more source
Low-Cost QCM Sensor System for Screening Semen Samples [PDF]
, 2010 Artificial insemination is a well-established part of modern agricultural practice. A viable semen sample is judged by the total number of spermatozoa (sperm) in the sample and the motility of the sperm.
Atherton, Shaun +6 more
core +2 more sources
Sperm dynamics in spiders (Araneae): ultrastructural analysis of the sperm activation process in the garden spider Argiope bruennichi (Scopoli, 1772). [PDF]
PLoS ONE, 2013 Storage of sperm inside the female genital tract is an integral phase of reproduction in many animal species. The sperm storage site constitutes the arena for sperm activation, sperm competition and female sperm choice. Consequently, to understand animal
Oliver Vöcking +2 more
doaj +1 more source