Results 41 to 50 of about 26,981 (241)

Use of atomic force microscopy for morphological and morphometric analyses of acrosome intact and acrosome-reacted human sperm

open access: yes, 2002
The objective of this study was to use atomic force microscopy (AFM), with submicron resolution, for morphophologic and morphometric analyses of acrosome intact and acrosome-reacted human sperm heads.
Wayner, Danial D. M.   +8 more
core   +1 more source

Sericin-Enriched Rabbit Semen Preservation: Implications for Short-Term Storage Quality and Fertility at 4 or 15 °C

open access: yesAnimals
The influence of sericin supplementation and chilling temperatures (4 and 15 °C) on the short-term storage quality and fertility of rabbit semen was assessed over 72 h of storage.
Sanan Raza   +5 more
doaj   +1 more source

Distribution of p14 during sperm acrosome reaction.

open access: yes, 2013
(A) Indirect immunofluorescence of anti-p14-labeled protein in acrosome reacted fixed caprine sperm permeabilized with paraformaldehyde. Left panel indicating the fluorescent and corresponding phase contrast photographs of sperm previously capacitated ...
Pinki Nandi (334552)   +3 more
core   +1 more source

Male reproductive system in stenopodidean shrimps: Unveiling basal reproductive traits in shrimp‐like Pleocyemata (Stenopodidae and Spongicolidae)

open access: yesThe Anatomical Record, EarlyView.
Abstract Stenopodidea represents one of the basal lineages within Pleocyemata, yet the male reproductive system (MRS) of this group remains poorly understood, with limited information available regarding its morphology and function. This study provides the first detailed description of the MRS in four stenopodidean shrimp species from two families ...
Caio Santos Nogueira   +2 more
wiley   +1 more source

Ultrastructure of the tubificid acrosome (Annelida, Oligochaeta)

open access: yes, 1978
The later morphogenesis of the acrosome of Limnodriloides winckelmanni and Rhyacodrilus arthingtonae is compared with that in Enchytraeus and in earthworms.
Bennett J.D., Jamieson B.G.M., Daddow L.
core   +1 more source

Analysis of ejaculate parameters and sperm morphology in roosters of initial laying strains

open access: yesCzech Journal of Animal Science
The aim of this study was to evaluate the influence of laying hybrid lines of domestic fowl (Gallus gallus f. domestica) and their age on ejaculate parameters in roosters.
Ladislav Máchal   +6 more
doaj   +1 more source

Mechanism of Acrosome Biogenesis in Mammals

open access: yesFrontiers in Cell and Developmental Biology, 2019
During sexual reproduction, two haploid gametes fuse to form the zygote, and the acrosome is essential to this fusion process (fertilization) in animals.
Muhammad Babar Khawar   +4 more
doaj   +1 more source

THE ACROSOME—LYSOSOME RELATIONSHIP [PDF]

open access: yesReproduction, 1975
A.R.C. Unit of Reproductive Physiology and Biochemistry, 307 Huntingdon Road, Cambridge CB3 0JQ (Received 21st November 1974) Using histochemical techniques Mancini et al. (1964) established that hyaluronidase, a lysosomal enzyme, is localized in the acrosomes of bull spermatozoa.
openaire   +2 more sources

Heat stress in spermatogenesis: a redox‐dependent decision network linking ROS, autophagy, and regulated cell death

open access: yesBiological Reviews, EarlyView.
ABSTRACT Heat stress (HS) is an increasing threat to male reproductive health, disrupting spermatogenesis through complex and interdependent cellular responses within the seminiferous epithelium. Although excessive reactive oxygen species (ROS) production is a hallmark of HS, ROS also act as central regulators of cell fate decisions beyond their role ...
Ribrio Ivan Tavares Pereira Batista
wiley   +1 more source

STUDIES OF LYSOPHOSPHOLIPIDS RELATED TO THE HAMSTER SPERM ACROSOME REACTION IN-VITRO [PDF]

open access: yes, 1993
Phospholipase A2 and lysophospholipids have been implicated in the mammalian sperm acrosome reaction. In this study we further investigated the role of this enzyme and lysophospholipids on the acrosome reaction of hamster spermatozoa.
LLANOS, MN, RIFFO, MS, MORALES, P
core   +2 more sources

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