Results 141 to 150 of about 153,594 (303)
Fluorescent nanodiamond labels: Size and concentration matters for sperm cell viability. [PDF]
Mater Today Bio, 2023 San-Martin CR +11 more
europepmc +1 more source
, 2009 Sperm cells are guided to the egg by chemoattractants in many species. Sperm cells are propelled in a liquid by the regular beat of their flagellum. In the presence of a concentration gradient of a chemoattractant, they can steer upwards the concentration gradient, a process called chemotaxis.
openaire +2 more sources
Early stages of tooth development in the harbor porpoise Phocoena phocoena
The Anatomical Record, EarlyView.Abstract Here we describe the stages of tooth development in toothed whales on the basis of the harbor porpoise (Phocoena phocoena). The aim of the study was to find out whether these stages are identical to those of other mammals analyzed so far although toothed whales are homodont and monophyodont.
Lasse M. Mathes +2 more
wiley +1 more source
Hydrodynamic Clustering of Human Sperm in Viscoelastic Fluids
Scientific Reports, 2018 We have numerically investigated sperm clustering behaviours, modelling cells as superpositions of regularised flow singularities, coarse-grained from experimentally obtained digital microscopy of human sperm, both in watery medium and a highly viscous ...
Kenta Ishimoto, Eamonn A. Gaffney
doaj +1 more source
The Anatomical Record, EarlyView.This work brings new information on the sexual characteristics of the crocodile shark (Pseudocarcharias kamoharai) exploring the pelvic fin musculature, as well as the siphon sac and the musculature and skeleton of the clasper. Our paper is the first to point out clearly the sexual dimorphism related exclusively to the pelvic fin musculature in males ...
Laura F. Mianutti +2 more
wiley +1 more source
Anàlisi del contingut de RNA i estudi mutacional de gens candidats en iinfertilitat masculina [PDF]
, 2012 [cat]La infertilitat és un problema que cada cop és més comú en la població actual. S’ha definit que la meitat dels casos de la infertilitat es deu a un factor masculí, no obstant, la gran majoria segueix sent d’etiologia desconeguda. Els grans objectius
Jodar Bifet, Meritxell
core
Tracing the evolutionary history of the morpho‐anatomy of baculum in primates
The Anatomical Record, EarlyView.Abstract Animal morphology reflects both evolutionary history and present‐day adaptation. Male mammal copulatory structures such as the baculum (penile bone) are ideal for studying these processes because of their complexity and high interspecific variability. In primates, however, research has focused mostly on baculum length.
Federica Spani +3 more
wiley +1 more source
The Effects of Cell Phone Waves (900 MHz-GSM Band) on Sperm Parameters and Total Antioxidant Capacity in Rats [PDF]
International Journal of Fertility and Sterility, 2013 Background: There is tremendous concern regarding the possible adverse effects of cell phone microwaves. Contradictory results, however, have been reported for the effects of these waves on the body.
Masoud Ghanbari +3 more
doaj
Actin remodeling driven by circLIMA1: sperm cell as an intriguing cellular model. [PDF]
Int J Biol Sci, 2022 Manfrevola F +15 more
europepmc +1 more source
The Anatomical Record, EarlyView.Abstract The claspers are the copulatory organs in male elasmobranchs, responsible for directing the semen into the female cloaca (C). However, the microscopic morphology of the claspers remains poorly understood. This study describes the morphology of the claspers and clasper glands (CGs) of cururu stingray (Potamotrygon wallacei) at different ...
Matheus Samuel Cunha Braga +4 more
wiley +1 more source