Intact male and female albino rats fed a vitamin K-deficient diet develop a plasma prothrombin-proconvertin deficiency. Male rats respond with a precipitous drop to approximately 20-30% of normal plasma levels within 2-5 days, whereas female rats respond at a slower rate. Ethynylestradiol, 5-10 mug/day, or castration, reduces the progressive decline of plasma prothrombin-proconvertin seen in no...

It is believed that when two male rats copulate with a single female, the last one that ejaculates fathers significantly more pups than the first one. To determine the effects of order and elapsed time between two males copulating with the same female, albino Wistar (W) and pigmented Long-Evans (LE) male rats copulated with a W female. Paternity was confirmed by the pups' pigmentation. Three gr...

The effects of injection of [His(7)]-corazonin and juvenile hormone (JH) III on the body color in L. migratoria were investigated using albino and normal (pigmented) nymphs. Most albino nymphs turned green in the fourth instar if injected with JH III during the last 2 days of the previous instar. When albino third instar nymphs injected with 10 pmol of [His(7)]-corazonin on different days were ...

In recent years, researchers have become interested in the way that the affective quality of contextual information transfers to a perceived target. We therefore examined the effect of a red (vs. green, mixed red/green, and achromatic) background - known to be valenced - on the processing of stimuli that play a key role in human interactions, namely facial expressions. We also examined whether ...

BACKGROUND AND AIMS Potassium, sulphur and zinc contents of mistletoe leaves are generally higher than in their hosts. This is attributed to the fact that chemical elements which are cycled between xylem and phloem in the process of phloem loading of sugars are trapped in the mistletoe, because these parasites do not feed their hosts. Here it is hypothesized that mutant albino shoots on otherwi...

Current study was set up to determine the response of 12 Iranian winter diploid barley (Hordeum vulgare L.) cultivars to anther culture on solid FHG induction medium supplemented with 90 mg/l sucrose, 2 mg/l 2,4-D and 0.1 mg/l kinetin. For cold pretreatment each selected spike was kept in a refrigerator at 4 C for 14 days. The experimental design consisted of a completely randomized design (CRD...

background: infertility is considered as a major health care problem of different communities. the high prevalence of this issue doubled its importance. a significant proportion of infertility have been related to environmental conditions and also acquired risk factors. different environmental conditions emphasized the need to study the different causes of infertility in each area. objective: t...

Green tea, prepared from the steamed and dried leaves of the shrub Camellia sinensis, is known for its antioxidant and anti-carcinogenic effects. However, its effects on male gonadal functions have not been explored adequately and the present investigation has been undertaken to evaluate the effect of green tea extract on gonads of adult male albino rats. Results of in vivo studies showed that ...