Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 4 of 4 for “"Spermatogenic cycle"”.
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CHANGES IN THE BIOCHEMICAL COMPOSITION OF TESTES DURING SPERMATOGENESIS IN ASTERIAS VULGARIS, WITH EMPHASIS ON THE ROLE OF POLYAMINES IN REGULATING PROLIFERATION
… useful for investigating mechanisms regulating spermatogenic events because of their structural simplicity and annual spermatogenic cycle. Examination of major biochemical classes during the spermatogenic cycle provides a definition of the changing chemical microenvironment influencing germinal …
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The Reproductive Cycle of Sceloporus undulatus From Alabama Corresponding Plasma Steroid Levels and Comments on Reproductive Variation.
… In June and July, testis mass was minimal. A new spermatogenic cycle had begun by August. Testicular recrudescence occurred in fall with concomitant increase in testis mass. Males had spermatids with a few transforming spermatozoa in their testes as they entered brumation. The longer warm season …
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Effects of a polychlorinated biphenyl in mice caged at different densities and fed at different nutritional levels
… It was hypothesized that PCBs disrupted the spermatogenic cycle via reduction in androgen and/or gonadotrophin levels. No interactions were observed between PCBs and Diet or PCBs and Caging on any of the reproductive characteristics examined in either species. In summary, PCB ingestion …