Name: ld5655v855_1910s734pdf size: 5873mb format: pdf downloads: 428. The testicular histology and cytology of spermatogenesis in graptemys pseudogeographica kohnii were examined using specimens collected between july 1996 and may 2004 from counties in northeastern arkansas a histological examination of the testes and germ cell cytology indicates a postnuptial testicular cycle of spermatogenesis and a major fall spermiation event. In this thesis, i have explored functions of three specific enzymes of the ubiquitin system, the e2 ubc4-testis, the hect e3 edd/rat100 and the deubiquitinating enzyme usp19, in mammalian spermatogenesis or muscle wasting.
The homeostasis of male genitalia in mammals is maintained by a group of stem cells called spermatogonial stem cells (sscs) which replenishes worn out cells in the testicular tissue in mouse, these cells are housed by specialised tubular structures called seminiferous tubules the ssc niche is found dispersed on the basal lamina, which is a two dimensional extracellular matrix along the. The origin and development of gametes is called gametogenesis (fig 3(b)1) this may be divided into spermatogenesis and oogenesis spermatogenesis deals with the development of male sex-cells called sperms in the male gonad or testis. Thesis was that fru tom and queen cats have reproductively adapted to man-made sterilization efforts by lowering the age at which they enter puberty evaluated at 200x for evidence of spermatogenesis and measurement of seminiferous tubule diameter for queens, the total ovarian uterine weights from fru queens were also recorded. Get this from a library spermatogenesis of normal and of hybrid pigeons : a dissertation, submitted to the faculty of the graduate school of arts, literature, and science, in candidacy for the degree of doctor of philosophy department of zoology [michael f guyer.
Thesis (ph d)--massachusetts institute of technology, dept of biology, 2006 dspace @ mit the role of cdyl and cdy in mammalian spermatogenesis research and teaching output of the mit community. Spermatogenesis in ompok pabda histology of gonads a spermatogonia: this is the primary stage of spermatogenesis which is the largest germ-cell in the testis. 62 effect of continuous light on spermatogenesis and testicular steroidogenesis in rats: possible involvement of alpha 2u-globulin nm biswas,1 r biswas,2 nm biswas3 and late h mandal 1department of physiology, college of medical sciences, bharatpur, chitwan, nepal, 2department of oncology, national cancer institute, bethesda, maryland, usa, 3departmental of medicine, nrs medical college.
Thesis abstract chagas disease and triatomine biology (heteroptera, triatominae), with emphasis on aspects of spermatogenesis r silistino-souza 2011 universidade estadual paulista “júlio de mesquita filho”, são josé do rio preto, sp, brasil phd thesis orienting prof: maria tercília vilela de azeredo oliveira. Spermatogenesis thesis in this study, i hypothesize that ptip is an essential epigenetic regulator in mouse spermatogenesis this suggests that after spermatogenesis is disrupted, its regeneration of spermatogenesis needs more than the existence of spermatogonia in which an intact btb is required. Androgens and follicle stimulating hormone are considered to be the most important factors in the regulation of spermatogenesis, and sertoli cells hold receptors for these hormones contact e-publish your thesis e-publish your article e-publish your degree project open access at ki order a thesis about the archive search dspace. Spermatogenesis the gonadotropin de- pendency of spermatogenesis has been demonstrated in several species by vari- ous experimental approaches, including hypophysectomy, gnrh immunization, thesis in immature sertoli cells (means et al 1976) and increases the secretion of specific proteins such as androgen-.
The effects of testicular nerve transection and epididymal white adipose tissue lipectomy on the effects of testicular nerve transection and epididymal white adipose tissue lipectomy on spermatogenesis in syrian hamster thesis, georgia state university, 2008. Request pdf on researchgate | function of progestin and its nuclear receptor in fish spermatogenesis | in this thesis, we set out to clone pgrs from three fish species belonging to different. Thesis abstract characterization of the nucleolar cycle and chromatoid body formation in the spermatogenesis of some vertebrate species rl peruquetti 2009 pós-graduação em genética. Previous models of spermatogenesis have concentrated on multiplication due to division to explain ratios between cell categories one cell category was a particularly important factor for describing the activity of the germinal epithelium spermatogenesis in the human infertile male curtis, diana (1979) thesis (phd) academic units: the.
Studies in spermatogenesis is a two volume book written by nettie maria stevens, and published by the carnegie institution of washington in 1905 and 1906 in the books stevens explains the research she conducted on chromosomal sex determination in the sperm and egg cells of insect species while at bryn mawr college, near philadelphia, pennsylvania. Study flashcards on spermatogenesis & oogenesis at cramcom quickly memorize the terms, phrases and much more cramcom makes it easy to get the grade you want. Its effect on translational control in drosophila melanogaster spermatogenesis david c keesling university of kentucky, this master's thesis is brought to you for free and open access by the biology at uknowledge it has been accepted for inclusion in theses and. Spermatogenesis in man - fertility and sterility.
With apoptosis and spermatogenesis in this thesis, therefore, i tested the general hypothesis that, in adult male sheep, under-nutrition will reduce sperm quality, due to germ cell apoptosis, that these responses will be explained by reductions in sertoli cell summary 5. A thesis submitted to the faculty of university of minnesota by kerri tana haider in partial fulfillment of the requirements spermatogenesis in mammals occurs in the testes to produce mature sperm for reproductive purposes spermatogonia are derived from primordial germ cells. Spermatogenesis creates functional sperm from an initially undifferentiated germ cell in the nematode caenorhabditis elegans, both males and hermaphrodites engage in spermatogenesis the hermaphrodite germ line, like that of the male, initiates spermatogenesis during the l4 larval stage. Equine spermatogenesis: meiotic chromosome behavior and recombination by ayman ismail al-jaru a thesis submitted in partial fulfillment for the requirements for the degree of doctor of philosophy at the university of central lancashire september 2010 i | p a g e declaration.