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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

The blood-testis barrier and blood vessel permeability in rat testis /

Tao, Lian. January 1994 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, 1994. / Includes bibliographical references (leaves 150-183).

The undescended testicle an experimental and clinical study ...

Wangensteen, Owen Harding, January 1900 (has links)
Thesis (Ph. D.)--University of Minnesota, 1925. / Cover title. Vita. Bibliography: p. 57-69.

Effects of ultrasonic irradiation on the cytochemistry of the rat testes

Mengoli, Henry F. January 1957 (has links)
Thesis--Catholic Univ. of America.

The morphology of the mammalian seminiferous tubule,

Curtis, George Morris, January 1900 (has links)
Thesis (PH. D.)--University of Michigan, 1914. / "Reprinted from the American journal of anatomy, vol. 24, no. 3, September, 1918." "Author's abstract of this paper issued by the Bibliographic service, July 19." "Literature cited": p. 393-394.

The testicular cycle of blue grouse (Dendragapus obscurus fuliginosus) and its relation to age, breeding behavior and migration

Simard, Benjamin Raymond-Marie January 1965 (has links)
The testicular cycle of blue grouse (Dendragapus obscurus fuliginosus) has been studied from the testes of two hundred and twenty-four birds collected on their summer range on Vancouver Island over the years 1958 to 1964. For two age classes, adult and yearling, the characteristics of the following cycles were compared and correlated. The cycle of increase in size of the testes, the cycle of increase in diameter of the seminiferous tubules, the cycle of the development of the stages of spermatogenesis, the cycles of relative and absolute increase of the interstitium and the cycles of abundance of interstitial cells. Samples of sperm from these two age classes were compared. Furthermore, these cycles were compared with migration, with the period of egg laying in the female, with behaviour, with age of the bird over two years of age and with body weight. In all these tests, the yearlings had a shorter breeding cycle characterised by a slower recrudescence, a delayed and shorter breeding period, a faster and an earlier regression. Although the yearlings had smaller testes and a lesser amount of tubular tissue, they all seemed to develop all the stages of spermatogenesis and to produce fertile sperm. The smaller amount of intertubular tissue in yearlings was suspected to be correlated with their secretive behaviour and the smaller growth of the testes of the yearlings was attributed to an inherited character rather than to inhibition by the environments, No difference was found in the testicular cycle between hooting and silent males and between replacement or territorial yearlings and silent ones. It was concluded that all male birds present on the breeding range were apparently potential breeders. Smaller interstitium and delayed maturity seemed to be the main factors preventing the young birds from adding to the population of breeders. / Science, Faculty of / Zoology, Department of / Graduate

The blood-testis barrier and blood vessel permeability in rat testis

Tao, Lian. January 1994 (has links) (PDF)
Bibliography: leaves 150-183. Considers the tubule and capillary barriers from the point of view of anatomy, physiological function and possible factors which may cause the tubule barrier to be breached or influence substance exchange across the capillary wall.

Properties of a CoA-dependent, stearoyl-specific transacylase from bovine testis membranes /

Hollenback, David. January 1997 (has links)
Thesis (Ph. D.)--University of Washington, 1997. / Vita. Includes bibliographical references (leaves [93]-94).

The effects of testicular capsulotomy on male fertility in the rat /

Qin, Da-nian. January 1995 (has links)
Thesis (Ph. D.)--University of Hong Kong, 1996. / Includes bibliographical references.

Encouraging testicular self-examination behaviors in college males examining the role of fear appeals in protection motivation theory /

Slider, Cara L. January 2009 (has links)
Thesis (M.S.)--West Virginia University, 2009. / Title from document title page. Document formatted into pages; contains iii, 76 p. : ill. Includes abstract. Includes bibliographical references (p. 40-43).

Differential expression of DNMT3L in azoospermia patient testes

Chen, Teng-yi 03 September 2008 (has links)
Delicate epigenetic modifications are essential for production of spermatids during spermatogenesis. DNA methyltransferase 3 (DNMT3), the enzymes involved in adding a methyl group to unmodified DNA, contains three members: DNMT3A, DNMT3B and DNMT3L. The latter lacks methyltransferase activity, but was closely associated with spermatogenesis in many reports. According to the presentation of mature spermatids in testis, azoospermia could be separated into obstructive and non-obstructive categories. Non-obstructive azoospermia is spermatogenesis defective, germ cells absent in seminiferous tube is the most serious type. Therefore, we would like to find out if there are differential expression of DNMT3 family transcripts in testes of azoospermia patients from infertility clinic. Using RT-PCR and qPCR, we found only 5 (29.4%) expressed DNMT3L in 17 non-obstructive patients, whereas all 20 obstructive patients expressed. Both groups were similar in expression levels of DNMT3A and DNMT3B. Nuclei of spermatogonia and spermatocyte were the main immunohisto-chemical localization of DNMT3L protein. Lost of germ cells should be the cause of undetectable DNMT3L expression in azoospermia patients. By this founding, it could serve as an indicator for ability of male germ cell culture in further applications of assisted reproduction.

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