Results 61 to 70 of about 129,614 (356)
Bio-Functional Sperm Parameters: Does Age Matter?
Frontiers in Endocrinology, 2020 The evaluation of biofunctional sperm parameters can explain some cases of idiopathic male infertility. Among these, sperm DNA fragmentation (fDNA) is the most studied biofunctional sperm parameter.
Rosita A. Condorelli +7 more
doaj +1 more source
Structural Abnormalities of Spermatozoa in Triploid Gynogenetic Crucian Carp (Carassius auratus)
Frontiers in Genetics, 2021 The spermatozoa of triploid gynogenetic crucian carp (Carassius auratus) (3nDTCC) possess a spermatogenesis process with a normal genetic background. However, the genetic materials of these spermatozoa do not completely inherit gynogenetic progeny in ...
Wangchao He +10 more
doaj +1 more source
The long-time dynamics of two hydrodynamically-coupled swimming cells [PDF]
Bull. Math. Biol. (2010) 72, 973-1005, 2009 Swimming micro-organisms such as bacteria or spermatozoa are typically found in dense suspensions, and exhibit collective modes of locomotion qualitatively different from that displayed by isolated cells. In the dilute limit where fluid-mediated interactions can be treated rigorously, the long-time hydrodynamics of a collection of cells result from ...
arxiv +1 more source
Mitochondria in teleost spermatozoa
Mitochondrion, 2017 There is an extraordinary diversity of reproductive modes in teleost and this variability is related to the phylogenetic relationships and adaption to very different biotopes. As in all vertebrates, sperm is produced as the end product of the process of spermatogenesis, and regarding teleost the spermatozoa lack an acrosome in almost all species and ...
Patricio Ulloa-Rodríguez +5 more
openaire +5 more sources
Capacitation of rabbit spermatozoa in vitro.
Biology of Reproduction, 1975 This research was carried out to define in vitro conditions that would enable ejaculated rabbit sperm to fertilize ova in vitro. During 20 mm exposure of sperm cells to defined media of increasing NaCI concentrations, progressive removal or alteration of
B. Brackett, G. Oliphant
semanticscholar +1 more source
Species difference in the expression of Fas and Fas ligand in mature mammalian spermatozoa
Czech Journal of Animal Science, 2017 Although it has been proposed that the Fas and Fas ligand (FasL) may protect ejaculated spermatozoa against apoptosis induced by lipoperoxidative damage and against lymphocytes present in the female genital tract, studies reported conflicting results on ...
Youwei Li +7 more
doaj +1 more source
Jurnal Kedokteran Hewan, 2021 Male infertility has occurred rapidly in the last few decades, primarily in developing countries. An antioxidant, hesperetin is a flavonoid that is found in abundance in orange peels.
Nerdy Nerdy +7 more
doaj +1 more source
Doing more with less: the flagellar end piece enhances the propulsive effectiveness of human spermatozoa [PDF]
Phys. Rev. Fluids 5, 073101 (2020), 2019 Spermatozoa self-propel by propagating bending waves along a predominantly active elastic flagellum. The organized structure of the "9 + 2" axoneme is lost in the most-distal few microns of the flagellum, and therefore this region is unlikely to have the ability to generate active bending; as such it has been largely neglected in biophysical studies ...
arxiv +1 more source
Oxidative stress impairs function and increases redox protein modifications in human spermatozoa.
Reproduction, 2014 Oxidative stress, generated by excessive reactive oxygen species (ROS) or decreased antioxidant defenses (and possibly both), is associated with male infertility.
Tania Morielli, C. O’Flaherty
semanticscholar +1 more source
Possible role of human ribonuclease dicer in the regulation of R loops
FEBS Open Bio, EarlyView.R loops play an important role in regulating key cellular processes such as replication, transcription, centromere stabilization, or control of telomere length. However, the unscheduled accumulation of R loops can cause many diseases, including cancer, and neurodegenerative or inflammatory disorders. Interestingly, accumulating data indicate a possible
Klaudia Wojcik +2 more
wiley +1 more source