Results 41 to 50 of about 370,507 (192)

KLC3 is involved in sperm tail midpiece formation and sperm function

open access: yesDevelopmental Biology, 2012
Kinesin light chain 3 (KLC3) is the only known kinesin light chain expressed in post-meiotic male germ cells. We have reported that in rat spermatids KLC3 associates with outer dense fibers and mitochondrial sheath. KLC3 is able to bind to mitochondria in vitro and in vivo employing the conserved tetratrico-peptide repeat kinesin light chain motif. The
Zhang, Ying   +5 more
openaire   +2 more sources

Male scorpionflies assess the amount of rival sperm transferred by females' previous mates [PDF]

open access: yes, 2007
Engqvist L. Male scorpionflies assess the amount of rival sperm transferred by females' previous mates. Evolution. 2007;61(6):1489-1494.Theory predicts that when sperm compete numerically, selection will favor males who vary the number of sperm they ...
Engqvist, Leif ; https://orcid.org/
core   +1 more source

Association between hypo-osmotic swelling test-induced tail swelling patterns and sperm quality

open access: yesFuture Science OA
Aim: The current sperm selection procedure for intracytoplasmic sperm injection has limited ability to detect structural and functional abnormalities of the spermatozoa.
Salima Daoud   +5 more
doaj   +1 more source

Environmental exposure to non-persistent endocrine disrupting chemicals and semen quality: An overview of the current epidemiological evidence

open access: yesInternational Journal of Occupational Medicine and Environmental Health, 2018
Some of the recent publications have reported a decline in semen quality in the last few decades. This phenomenon is associated with environmental factors, particularly with exposure to endocrine disrupting chemicals (EDCs).
Dorota Zamkowska   +3 more
doaj   +1 more source

Evaluation of SEPT2 and SEPT4 transcript contents in spermatozoa from men with asthenozoospermia and teratozoospermia

open access: yesHealth Science Reports, 2021
Background and aims Motility and morphological defects of spermatozoa can cause male infertility. Sperm RNAs are related to sperm quality. They are considered to have clinical values as a biomarker for assessing sperm quality and fertility potential. The
Madiheh Mazaheri Moghaddam   +6 more
doaj   +1 more source

Formation of Detached Tail and Coiled Tail of Sperm in a Beagle Dog

open access: yesJournal of Veterinary Medical Science, 2005
The right testis and epididymis were excised from a Beagle dog that ejaculated high percentages of sperm with detached tails and with coiled tails. Cross sections of the organs were stamped on glass slides and histological examination of the organs was performed to find the portion where sperm with the abnormal tails appear. Many sperm with tails whose
KAWAKAMI, Eiichi   +4 more
openaire   +3 more sources

Determinants of sperm transfer in the scorpionfly Panorpa cognata: male variation, female condition and copulation duration [PDF]

open access: yes, 2003
Engqvist L, Sauer KP. Determinants of sperm transfer in the scorpionfly Panorpa cognata: male variation, female condition and copulation duration. Journal of Evolutionary Biology.
Sauer, Klaus Peter   +1 more
core   +1 more source

Morphometry of Boar Spermatozoa in Semen Stored at 17 °C—The Influence of the Staining Technique

open access: yesAnimals, 2022
The aim of the study was to assess the morphometry of sperm during storage of liquid boar semen at 17 °C. An attempt was also made to evaluate the suitability of three staining methods for assessment of boar sperm morphometry.
Dorota Szablicka   +3 more
doaj   +1 more source

Theoretical influence of female mating status and remating propensity on male sperm allocation patterns [PDF]

open access: yes, 2006
Engqvist L, Reinhold K. Theoretical influence of female mating status and remating propensity on male sperm allocation patterns. JOURNAL OF EVOLUTIONARY BIOLOGY.
Reinhold, Klaus   +3 more
core   +1 more source

Sperm competition and sperm length in shorebirds [PDF]

open access: yes, 1999
We investigated how sperm morphology varies across 16 species of shorebirds in the Scolopacidae, Charadriidae, and Jacanidae. Sperm were significantly longer in nonmonogamous than in socially monogamous species.
Briskie, J V, Johnson, D D P
core  

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