搜索结果: 16-30 共查到“性科学 spermatozoa”相关记录179条 . 查询时间(0.098 秒)
The presence of a motility inhibitor within spermatozoa may explain the poor sperm motility of some infertile men
motility inhibitor spermatozoa poor sperm motility infertile men
2009/2/23
The presence of motility inhibitors in seminal plasma and within spermatozoa from control and infertile men with poor sperm motility was investigated using demembranated reactivated human spermatozo...
Implantation of artificial spermatocele with cup-shaped prosthesis for excretory azoospermia and chemical management of aspirated spermatozoa
artificial spermatocele cup-shaped prosthesis excretory azoospermia chemical management
2009/2/23
A cup-shaped silicon prosthesis was developed to treat patients with excretory azoospermia and chemical management of the aspirated spermatozoa was attempted prior to cervical insemination of the wi...
Morphometric analysis of spermatozoa in the assessment of human male fertility
human spermatozoa morphometry fertility
2009/2/23
A videomicrographic system was developed for measurement of morphometric parameters of human spermatozoa. Contours of the images of spermatozoa on a video monitor are digitized by manually tracing t...
Activation of palmitic acid by human spermatozoa
Activation palmitic acid human spermatozoa
2009/2/23
Human spermatozoa were studied to determine if a long chain fatty acid, CoASH ligase (AMP) (E.C. 6.2.1.3), was present. Ligase activity was measured with a radioligand millipore filter technique and...
A comparative analysis of cAMP-dependent protein kinase regulatory subunits in sea urchin and rat spermatozoa
spermatozoa azido photoprobes protein kinase nucleotides epididymis
2009/2/23
8-Azido cAMP photoaffinity labeling of cAMP-dependent protein kinase regulatory subunits (R1 = 49 K;R2 = 55K) was done on spermatozoa from species lacking, and species containing an epididymis. Sper...
Decreased fertility and motility of spermatozoa from rats immunized with a prealbumin epididymal-specific glycoprotein
acidic epididymal glycoprotein spermatozoa rat immunization fertility
2009/2/23
This study investigated the effects on the progressive motility, zona-binding capacity, and fertility of spermatozoa from the cauda epididymidis of adult male rats that were actively immunized again...
Comparison of the penetration ability of human spermatozoa into bovine cervical mucus and zona-free hamster eggs
penetration ability human spermatozoa bovine cervical mucus zona-free hamster eggs
2009/2/20
In vitro bovine cervical mucus (BCM) penetration tests, sperm penetration assays (SPA) using zona-free hamster eggs, and routine semen analyses were performed on a total of 136 freshly collected sem...
Release, extraction, and stability of hyaluronidase associated with human spermatozoa
spermatozoa hyaluronidase human cryopreservation
2009/2/20
In contrast to the rabbit: 1) no hyaluronidase could be detected in fresh or frozen human seminal plasma, all color formation on assay being due to a dialyzable, heat stable factor; 2) almost no hya...
Effects of white blood cells on the in vitro penetration of zona-free hamster eggs by human spermatozoa
white blood cells zona-free hamster eggs human spermatozoa
2009/2/20
The presence of white blood cells in semen has been associated with male infertility. Previous studies indicate that pyospermia occurs in conjunction with decreases in sperm motility, number of no...
Effect of gossypol acetate on guinea pig epididymal spermatozoa in vivo and their susceptibility to capacitation in vitro
gossypol sperm motility sperm maturation cytoplasmic droplet capacitation acrosome reaction
2009/2/20
To determine the effects of gossypol acetate on guinea pig epididymal and vas deferens sperm maturity and in vivo susceptibility to in vitro capacitation and the acrosome reaction, we examined sperm...
Specific binding of the glycosaminoglycan 3H-heparin to bull, monkey, and rabbit spermatozoa in vitro
sperm acrosome reaction glycosaminoglycans
2009/2/20
In Vitro binding and some binding parameters of the glycosaminoglycan heparin to viable epididymal or ejaculated bull spermatozoa, ejaculated rabbit spermatozoa, and frozen-thawed rhesus monkey sper...
Comparison of glycerol and a zwitter ion buffer system as cryoprotective media for human spermatozoa. Effect on motility, penetration of zona-free hamster oocytes, and acrosin/proacrosin
spermatozoa human cryopreservation
2009/2/20
This study compared the cryoprotective effect of glycerol with that of a zwitter ion buffer system (TESTCY). Spermatozoa that are cryopreserved in the presence of glycerol possess a somewhat highe...
The binding patterns of antisera to sex steroids and human gonadotropins on human and rhesus monkey spermatozoa
human spermatozoa monkey spermatozoa hormone binding sites immunofluorescence steroids
2009/2/20
The presence of different hormones on the surface of ejaculated spermatozoa was determined by immunofluorescence studies of the binding patterns of specific antisera to these hormones. There were st...
Morphology of spermatozoa in infertile men with and without varicocele
sperm morphology semen analysis vancocele
2009/2/19
This study was carried out to evaluate the morphology of spermatozoa in infertile men with and without varicocele. A series of 285 ejaculates were fully evaluated for seminal volume, sperm count, mo...
Immunocytochemical localization of acrosin on both acrosomal membranes and in the acrosomal matrix of porcine spermatozoa
spermatozoa acrosin electron microscopy
2009/2/19
Immunocytochemical techniques were employed to determine, at the ultrastructural level, the location of acrosin in porcine spermatozoa. Antisera to highly purified porcine acrosin was produced in ...