United States officials who in 1995 visited the most advanced of six former Soviet germ-production plants in Stepnogorsk, Kazakhstan, found 10 20-ton fermentation vats as high as four stories.
An obvious explanation would be that the investment into germ cell production is sex-specific.
Thus, disregarding the costs of germ cell production and considering only social stress, one would predict that females should save more energy upon gender separation than males.
Previous studies also reported that mice in which essential genes related to the maintenance of spermatogonial stem cells have been knocked out do not frequently show abnormalities in germ cell production during the first wave of spermatogenesis.
On the other hand, it is estimated that about 30% of azoo-/oligozoospermia are caused by chromosomal abnormalities or mutations of genes involved in germ cell production and function [3].
During development, reduced LH may impede the initiation of spermotogenesis and in the adult may compromise daily germ cell production or epididymal function; for example, see (Ma et al., 2004).
To compare germ cell production between OSKM and OSKMV derivations and our human fetal testis control, we calculated relative germ cell numbers by multiplying the percent occupied tubules by the number of cells per tubule and compared them to our positive control.
Our data suggest that l-Trp metabolites induce a SKN-1-mediated detoxification response that might mediate rescue of germ cell production in OP50-fed nhr-114 mutants, but also that l-Trp supplementation alone does not recapitulate the benefits of HT115 feeding for longevity.
The isolates were identified using standard procedures, (i.e. morphology on cornmeal agar plates, germ-tube production in serum, and biochemical analysis using the Vitek system Yeast Biochemical cards, API 20CAUX test, or ATB 32C panels [Bio-Merieux, Rome, Italy]) [ 12].
C. dubliniensis and C. albicans are known to share many morphological and physiological characteristics such as germ tube positivity, production of chlamydospores and similar biochemical profiles leading to common misidentification of these two species (Sullivan and Coleman 1998; Sullivan et al. 1995).
