Results 91 to 100 of about 26,981 (241)

Motilidade espermática e integridade acrossomal em doses de sêmen suíno refrigeradas e inoculadas com Esecherichia coli e Staphylococcus aureus Sperm motility and acrossomal integrity in liquid boar semen dosis inoculated with Esecherichia coli and Staphylococcus aureus

Ciência Rural, 2000
Foram utilizados 12 ejaculados, coletados de maneira asséptica, distribuídos em sete tratamentos, sendo um grupo controle e os demais inoculados com três diferentes concentrações de S. aureus ou E. coli (5 x 10(5), 5 x 10(6) e 5 x 10(7) UFC/ml).
Paulo Eduardo Bennemann, Fernando Pandolfo Bortolozzo, Ivo Wentz, Marisa Ribeiro de Itapema Cardoso   +3 more
doaj   +1 more source

Synergistic Effects of Thyroxine and Nano‐Melatonin on Post‐Thaw Sperm Quality, Antioxidant Defence and Fertility of Cryopreserved Simmental Bull Semen

Veterinary Medicine and Science, Volume 12, Issue 6, November 2026.
Effects of thyroxine (T) and nano‐melatonin (NM) supplementation on cryopreserved Simmental bull semen were evaluated. The combination of thyroxine (0.5 µg/dL) and nano‐melatonin (30 µg/dL) significantly improved post‐thaw sperm motility, membrane integrity, antioxidant status, and fertility while reducing oxidative stress and apoptosis. These findings
Marwa Abonagy, Ahmed Arisha, Maha Salama, Mohey Ashour, Mustafa Shukry, Sameh Shedeed, Ahmed Shehabeldin, Nagi El‐Shafai, Zein Ibrahim, Shawky Mahmoud, Michel Saad, Ahmed Alameen, Rasha Yassin Elkhidr, Osama Hassan Ali, Arafat Khalphallah, Enas Elmeligy, Khaled Abdulaziz Khesruf, Enas Ahmed Abdelhafez, Alaa Algabary   +18 more
wiley   +1 more source

Acrosome size and kinematics of human spermatozoa [PDF]

, 2007
Thesis (MScMedSc (Biomedical Sciences. Medical Physiology))--University of Stellenbosch, 2007.For spermatozoa to gain access to the oocyte for fertilization, lytic enzymes need to be released during the acrosome reaction. These enzymes, which are stored
Murray, George M.
core  

The use of deidentified organ donor testes for research

Andrology, Volume 14, Issue 8, Page 2359-2372, November 2026.
Abstract Our knowledge of testis development and function mainly comes from research using mammalian model organisms, primarily the mouse. However, there are integral differences between men and other mammalian species regarding cellular composition and expression profiles during fetal and post‐natal testis development and in the mature testis ...
Marina V. Pryzhkova, Marnie W. Skinner, Juliana I. Candelaria, Stephen R. Wellard, Philip W. Jordan   +4 more
wiley   +1 more source

STUDIES ON THE ACROSOME. II. ACROSOME REACTION IN STARFISH SPERMATOZOA

The Biological Bulletin, 1954
1. When the spermatozoa of three starfish species, Asterina pectinifera, Asterias amurensis and Astropecten scoparius, are suspended in a dilute (0.1-1.0%) solution of egg albumin in sea water and mixed with homologous egg-water, three effects can be noted:a. many of the spermatozoa are agglutinated by their heads, forming permanent clusters;b.
Dan, Jean Clark, Kitahara, A, Kohri, T
openaire   +3 more sources

Biallelic Truncating Variant in LRGUK Is Associated With Severe Multiple Morphological Abnormalities of the Sperm Flagella and Sperm Nuclear Defects in Humans

Clinical Genetics, Volume 110, Issue 5, Page 538-548, November 2026.
A homozygous truncating variant in LRGUK results in loss of the LRGUK protein and causes multiple morphological abnormalities of the flagella (MMAF), disrupted axonemal architecture, central pair defects, abnormal chromatin organization, and severe male infertility, establishing LRGUK as a novel human infertility gene.
Wiâme Mokkedem, Zeina Wehbe, Anne‐Laure Barbotin, Angèle Boursier, Célia Tebbakh, Nicolas Thierry‐Mieg, Marie Bidart, Antonella Migliaccio, Rosanna Chianese, Christophe Arnoult, Raoudha Zouari, Zine‐Eddine Kherraf, Pierre F. Ray, Guillaume Martinez, Charles Coutton   +14 more
wiley   +1 more source

Mechanisms That Protect Mammalian Sperm from the Spontaneous Acrosome Reaction

, 2023
To acquire the capacity to fertilize the oocyte, mammalian spermatozoa must undergo a series of biochemical reactions in the female reproductive tract, which are collectively called capacitation. The capacitated spermatozoa subsequently interact with the
Haim Breitbart, Elina Grinshtein
core   +1 more source

Pelacakan Kerusakan Akrosom Spermatozoa Domba Selama Proses Pembekuan dengan Teknik Histokimia Lektin (DETECTION OF ACROSOMAL DAMAGE OF RAM SPERMATOZOA DURING FREEZING PROCESS USING LECTIN HISTHOCHEMICAL TECHNIQUE)

Jurnal Veteriner, 2016
Freezing process in ram spermatozoa caused damage of the plasma membrane and acrosome thatlead to the decrease of spermatozoa fertility. Research was conducted to evaluate acrosomal damageduring freezing process using lectin histochemical technique ...
Lisa Dwi Fannessia, Ni Wayan Kurniani Karja, I Ketut Mudite Adnyane, Mohamad Agus Setiadi   +3 more
doaj  

Oocyte–cumulus cell interaction: a key factor in early embryo development

Biological Reviews, Volume 101, Issue 5, Page 2265-2278, October 2026.
ABSTRACT The evaluation of oocyte competence is a fundamental step in achieving successful outcomes following assisted reproduction techniques (ART). At present, however, conventional oocyte maturation assessment is carried out by morphological observation, which is a subjective method that does not consider molecular features.
Marc Torres‐Garrido, Marc Yeste, Yentel Mateo‐Otero   +2 more
wiley   +1 more source

Regulation of the Acrosome Reaction by the Transmembrane Adenylyl Cyclase

REGULATION OF THE ACROSOME REACTION BY THE TRANSMEMBRANE ADENYLYL CYCLASE SEPTEMBER 2012 DOUGLAS HADDAD, B.S., UNIVERSITY OF MASSACHUSETTS AMHERST M.Sc., UNIVERSITY OF MASSACHUSETTS AMHERST Directed by: Pablo Visconti Capacitation prepares mammalian ...
Haddad, Douglas M
core   +1 more source