搜索结果: 1-15 共查到“性科学 activity”相关记录58条 . 查询时间(0.187 秒)
Effect of Neem Oil on Sperm Mitochondrial Activity
Normozoospermia Neem Oil Sperm Mitochondrial Activity
2015/7/15
It is a known fact that neem oil has some effect on motility of sperm. Motility of sperm depends on mitochondrial activity present in mid-piece of sperm. In the present study, the mitochondrial activi...
Differences in Teenage Pregnancy Rates Among Five Developed Countries：The Roles of Sexual Activity and Contraceptive Use
Teenage Pregnancy Rates Contraceptive Use Sexual Activity
2009/9/16
Context: Adolescent pregnancy, birth, abortion and sexually transmitted disease (STD) rates are much higher in the United States than in most other developed countries.
Methods: Government statist...
Heterosexual Genital Sexual Activity Among Adolescent Males：1988 and 1995
Heterosexual Adolescent Males Sexual Activity
2009/9/15
Context: Researchers have paid little attention to adolescents' experience with genital sexual activity other than vaginal intercourse, even though oral and anal intercourse expose youth to the risk o...
A simple, clinical assay to evaluate the acrosin activity of human spermatozoa
acrosin activity human spermatozoa
2009/2/23
Acrosin, a sperm-specific acrosomal proteinase, has an essential role in the fertilization process. Low levels of acrosin appear to be associated with subfertility and infertility, and the acrosin a...
Inhibition of ornithine decarboxylase activity by follicle stimulating hormone in primary culture of rat Sertoli cells
ornithine decarboxylase follicle stimulating
2009/2/23
The effect of follicle stimulating hormone on the activity of ornithine decarboxylase (ODC) was determined in primary culture of rat Sertoli cells. Three different FSH preparations (NIH oFSH-S-15, S...
Biochemical studies of metalloendoprotease activity in the spermatozoa of three mammalian species
Biochemical studies metalloendoprotease activity spermatozoa three mammalian species
2009/2/23
Ejaculated porcine and human spermatozoa, hamster spermatozoa from the cauda epididymidis, isolated hamster sperm heads and hamster cytoplasmic droplets contained activity that hydrolyzed the metall...
Prostaglandin dehydrogenase activity of rat and rabbit testicular tissues and accessory glands before and after castration
Prostaglandin dehydrogenase activity rat rabbit testicular tissues
2009/2/20
Rat reproductive tissues contained both 15-hydroxy-prostaglandin dehydrogenase (PGDH) and delta 13-reductase activities, while rabbit tissues exhibited only PGDH activity. In the rat, delta 13-reduc...
Inhibition of 5 alpha-reductase activity and alteration of nuclear testosterone.
5a-reductase fibroblast androgen receptor enzyme inhibitor nuclear uptake
2009/2/20
17 beta-N, N-diethylcarbamoyl-4-methyl-4-aza-5 alpha-androstan-3-one (4-MA) inhibits 5 alpha-reductase activity in cultured human genital skin fibroblasts. Enzyme kinetic studies analyzed by Eadie...
Periodic exposure to a brief light signal stimulates neuroendocrine-gonadal activity in golden hamsters
photoperiodism circadian rhythms hamsters seasonal reproduction neuroendocrine-gon
2009/2/20
The photoperiodic effects of a periodic light pulse on neuroendocrine-gonadal activity in the male golden hamster was examined using a night interruption paradigm. Adult male hamsters that had been ho...
The aging Leydig cell. VIII. Protein kinase activity
The aging Leydig cell Protein kinase activity
2009/2/19
The effects of aging on cyclic AMP (cAMP) dependent protein kinase activity of purified Leydig cells were evaluated. Purified Leydig cells from 20-day-, 40-day-, 60-day- and 30-month-old rats were...
In Vitro Effect of Inhibin on Cyclic AMP-Phosphodiesterase Activity in Rat Testes
inhibin cyclic AMP-phosphodiesterase
2009/2/19
We have previously reported that incubation of testicular slices with inhibin in the presence of 6 x 10-8 M oFSH resulted in a dose-related reduction in accumulation of cyclic AMP due to a decreas...
In Vitro Gonadotropin Stimulation of Bovine Sertoli Cell Ornithine Decarboxylase Activity
ornithine decarboxylase Sertoli cell gonadotropins bovine calf
2009/2/19
The activity of ornithine decarboxylase (ODC) was determined in primary cultures of bovine Sertoli cells after gonadotropin stimulation in vitro. A significant increase in both ODC activity and putr...
Disappearance of Inhibin-like Activity in Bull Seminal Plasma Following Castration
inhibin seminal plasma castration
2009/2/19
Ejaculates from normal and castrated bulls were evaluated for the presence of inhibin-like activity. Inhibin activity found in the seminal plasma of normal bulls became undetectable after castrati...
Rat Testicular Phospholipase A2 Activity：pH Optima, Its Cellular and Subcellular Distribution in the Gonad, and Some Factors That May Modulate Its Activity
rat testicular phospholipase A2 activity pH optima localization control
2009/2/19
A sensitive radiometric assay was developed for detecting phospholipase A1 and A2 (PLA1 and A2) activity. Four to five times more PLA2 activity was observed in rat testes than PLA1 activity. Two PLA...
Role of Hyaluronidase in Fertilization: The Antifertility Activity of Myocrisin, a Nontoxic Hyaluronidase Inhibitor
myocrisin hyaluronidase inhibitor fertilization contraception
2009/2/18
Myocrisin, a hyaluronidase inhibitor of low molecular weight, was tested for antifertility activity. In addition, the effect of myocrisin on penetration of the follicle cell layer by spermatozoa w...