Results 61 to 70 of about 154,792 (190)

Comparison of different statistical approaches to evaluate morphometric sperm subpopulations in men

Asian Journal of Andrology, 2016
This study was designed to characterize morphometric sperm subpopulations in normozoospermic men by using different statistical methods and examining their suitability to classify correctly different sperm nuclear morphologies present in human ejaculates.
Jesús L Yániz, Sandra Vicente-Fiel, Carles Soler, Pilar Recreo, Teresa Carretero, Araceli Bono, José M Berné, Pilar Santolaria   +7 more
doaj   +1 more source

Voltage‐gated potassium channels mediate thyroid hormone control of skeletal muscle excitability

The Journal of Physiology, EarlyView.
Abstract figure legend Thyroid hormone (TH)‐dependent remodelling of potassium (K+) channel networks regulates skeletal muscle (SkM) excitability. Triiodothyronine (T3), locally generated from thyroxine (T4) by type 2 deiodinase (D2), binds thyroid hormone receptors (TRα/β) and modulates transcription via thyroid response elements (TREs).
Annarita Nappi, Caterina Miro, Annunziata Gaetana Cicatiello, Ilaria Piccialli, Serena Sagliocchi, Lucia Acampora, Federica Restolfer, Rosa Sirica, Melania Murolo, Emery Di Cicco, Daniela Terracciano, Anna Pannaccione, Monica Dentice   +12 more
wiley   +1 more source

STUDY ON CHANGES OF SPERM HEAD MORPHOMETRY AND DNA INTEGRITY OF FREEZE-DRIED BOVINE SPERMATOZOA

Journal of the Indonesian Tropical Animal Agriculture, 2016
Changes of sperm heads morphometric and DNA integrity of freeze-dried bovine spermatozoa were investigated. Freeze-dried spermatozoa had stored in the refrigerator at 4°C for 2 years.
S. Said, F. Afiati, T. Maulana
doaj   +1 more source

Sperm mitochondria: species specificity and relationships to sperm morphometric features and sperm function in selected mammalian species [PDF]

, 2011
Philosophiae Doctor - PhDNumerous studies on mammalian spermatozoa have reported large variations in the dimensions of the main sperm structural components, namely the head, midpiece and flagellum.
Maree, Liana
core  

Post-Meiotic Intra-Testicular Sperm Senescence in a Wild Vertebrate [PDF]

, 2012
There is growing interest in sperm senescence, both in its underlying mechanisms and evolutionary consequences, because it can impact the evolution of numerous life history traits. Previous studies have documented various types of sperm senescence, but
Richard H. Wagner, Penn, Dustin J., Richard H Wagner, Hoi Herbert, Wagner, Richard H., Hettyey Attila, Hoi, Herbert, Attila Hettyey, Dustin J. Penn, Balázs Vági, Herbert Hoi, Vági Balázs, Wagner Richard H., Penn Dustin J., Hettyey, Attila, Vági, Balázs, Dustin J Penn   +16 more
core   +2 more sources

Fish Sperm Subpopulations Detection, Separation, and Application: Current State and Trends

Reviews in Aquaculture, Volume 18, Issue 4, September 2026.
Modern advances in sperm biology highlight the necessity of recognising intra‐ejaculate heterogeneity as a central concept for advancing both the fundamental understanding of fertilisation processes and the development of artificial reproduction techniques in fishes. ABSTRACT Sperm subpopulations represent a fundamental manifestation of intra‐ejaculate
Viktoriya Dzyuba, William V. Holt, Borys Dzyuba   +2 more
wiley   +1 more source

Sperm indexes obtained using computer‐assisted morphometry provide a forecast of the freezability of canine sperm [PDF]

International Journal of Andrology, 2007
SummarySperm morphometric indexes obtained after principal component analysis were used to investigate its value as diagnostic tests for freezability. Semen from six dogs was frozen–thawed following a standard protocol. Before freezing, computer‐assisted analysis of sperm morphometry (CASMA) was performed.
I, Núñez-Martínez, J M, Moran, F J, Peña   +2 more
openaire   +2 more sources

Cryptic male choice: sperm allocation strategies when female quality varies [PDF]

, 2002
Reinhold K, Kurtz J, Engqvist L. Cryptic male choice: sperm allocation strategies when female quality varies. Journal of Evolutionary Biology. 2002;15(2):201-209.We examined evolutionary stable sperm allocation and included stochastic variation in male ...
Reinhold, Klaus, Engqvist, Leif ; https://orcid.org/, Kurtz, Joachim   +2 more
core   +1 more source

Antispermatogenic mechanism of trona is associated with lipid peroxidation but not testosterone suppression

Journal of Human Reproductive Sciences, 2017
Background: About half of the cases of infertility in couples have been attributed to male factor. Despite the claim in folklore medicine that trona (a sesquicarbonate or hydrated carbonate of sodium) causes fetal loss, its effect on male reproductive ...
Ayodeji F Ajayi, Roland E Akhigbe
doaj   +1 more source

Bull spermatozoa selected by thermotaxis exhibit high DNA integrity, specific head morphometry, and improve ICSI outcome

Journal of Animal Science and Biotechnology, 2023
Background Sperm migration by thermotaxis is a guidance mechanism that operates along the oviduct and it has proved to be a valid method for selecting spermatozoa with low DNA fragmentation (SDF) in mice, humans, and stallions.
Sara Ruiz-Díaz, Rosane Mazzarella, Paula Navarrete-López, Raúl Fernández-González, Celia de Frutos, María Maroto, Claudia Cucala, Paula Beltrán-Breña, Marta Lombó, Dimitrios Rizos, Alfonso Gutiérrez-Adán   +10 more
doaj   +1 more source