Results 81 to 90 of about 69,850 (299)

Role of oxidative stress and antioxidants in domestic and non-domestic cat spermatozoa [PDF]

, 2010
Living cells, including spermatozoa, stored under aerobic conditions require oxygen to support their normal metabolism. Excessive levels of metabolites (reactive oxygen species; ROS) can cause cell damage or lipid peroxidation.
Thuwanut, Paweena
core  

Insemination factors affecting the conception rate in seasonal calving Holstein-Friesian cows

, 2003
peer-reviewedDifferences in conception rate to first service between artificial inseminations (AI) carried out by commercial AI operators (CAI) or do-it-yourself operators (DIY), between natural service (NAT) and AI, between different AI sires, and ...
Mee, John F, Dillon, Pat, Mee, John, Evans, R. D., Donagh Berry, Kathleen O'Sullivan, O'Sullivan, Kathleen, Pat Dillon, Ross Evans, John Mee, Buckley, Frank, Frank Buckley, Berry, Donagh, Evans, Ross   +13 more
core   +1 more source

Clinical Profile of Patients with Infertility Presenting to Tertiary Care Center: An Observational Study

Journal of Nepal Medical Association
Introduction: Infertility, defined as the inability to conceive after a year of regular unprotected sexual activity, is a significant global health concern.
Jyotshna Tiwari, Dipty Shrestha, Durga Thapa, Sirjana Rawal, Rijan Kafle   +4 more
doaj   +1 more source

Does sperm DNA fragmentation correlate with semen parameters?

Reproductive Medicine and Biology, 2019
Purpose This study aimed to investigate the association between sperm quality assessed by routine semen analysis and sperm DNA integrity assay. Methods In our cross‐sectional study, a total of 318 men from the infertile couples were enrolled from ...
Minh Tam Le, Tam An Thi Nguyen, Hiep Tuyet Thi Nguyen, Thai Thanh Thi Nguyen, Van Trung Nguyen, Dinh Duong Le, Vu Quoc Huy Nguyen, Ngoc Thanh Cao   +7 more
doaj   +1 more source

Comparison of pre-operative and post-operative (varicocelectomy) sperm parameters in patients suffering varicocle with and without reflux in Doppler ultrasonography

Journal of Family Medicine and Primary Care, 2019
Background: Varicocele can cause progressive testicular damage and infertility. Severe retrograde blood flow to the internal spermatic vein has been suggested as a risk factor for infertility or progressive/stable varicocele. We have aimed to Compared th
Mostafa Babai, Mohammad Momen Gharibvand, Mohammad Momeni, Dinyar Khazaeli   +3 more
doaj   +1 more source

Small RNA pathways in mammalian oocytes

FEBS Open Bio, EarlyView.
Three distinct small RNA pathways operate in mammalian oocytes: RNAi interference (RNAi), the microRNA (miRNA) pathway, and the PIWI‐associated RNA (piRNA) pathway. These pathways use small RNAs to guide sequence‐specific repression and contribute to oocyte biology by targeting genes and mobile elements or appear insignificant since different ...
Petr Svoboda, Josef Pasulka
wiley   +1 more source

From energy provision to protein synthesis: Tunnelling nanotubes as mediators of intercellular metabolic cooperation in cancer

FEBS Open Bio, EarlyView.
The cytoskeleton‐mediated transport of mitochondria via tunnelling nanotubes restores respiration, increases ATP production, rescues cells from apoptosis, activates the AKT/mTOR signalling pathway, promotes cell migration and invasiveness, contributes to cancer progression and treatment resistance.
Stanislava Martínková, Jan Trnka
wiley   +1 more source

Lowering Sperm Dose Rates in Frozen Semen for Bovine Artificial Breeding

, 2007
The New Zealand Dairy industry relies on artificial breeding to produce high genetic merit replacement stock. Proven bull semen is extended and preserved as either ambient temperature product or as frozen doses.
Pitt, Colin John
core  

ANALYSIS OF THE QUALITY OF SEXED BULL SEMEN BY COMPUTER-ASSISTED SEMEN ANALYSIS-CASA

, 2022
The quality of the ejaculate is determined by examination of the macroscopic (volume, density, color, smell) and microscopic properties of the sperm (concentration of spermatozoa in 1 ml and the total number of spermatozoa in the ejaculate, morphology ...
Pantić, Goran, Vladimir MAGAŠ, Slobodanka VAKANJAC, Goran PANTIĆ, Ljubomir JOVANOVIĆ, Danijela KIROVSKI, Magaš, Vladimir, Vakanjac, Slobodanka, Jovanović, Ljubomir, Kirovski, Danijela   +9 more
core   +1 more source

Pathways and pitfalls: a qualitative study of student experiences in biomedical science education

FEBS Open Bio, EarlyView.
Biomedical science students from underrepresented backgrounds face barriers including financial strain, disrupted laboratory access and cultural exclusion. Peer networks provide vital support when institutional systems are difficult to navigate. To create inclusive learning environments and achieve academic success, educators should blend active, hands‐
Olivia J. Russell, Cassy Ross, Panagiota S. Filippou, Bruno Silvester Lopes, Dominic Gilchrist, Paul Dean, Kamar Ameen‐Ali, Tora K. Smulders‐Srinivasan, Ahmad A. Khundakar   +8 more
wiley   +1 more source