Sökning: "seminiferous tubules"

Visar resultat 1 - 5 av 9 avhandlingar innehållade orden seminiferous tubules.

  1. 1. Growth factors in spermatogenesis

    Författare :Aida Wahlgren; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Testis; seminiferous tubules; proliferation; growth factors; sex steroids;

    Sammanfattning : The aim of this study was to increase the knowledge of die effects of locally produced growth factors and hormones on germ cell proliferation in rat testis in vitro. Since impaired sperm production and function accounts for half the cases of infertility, it is important to understand the physiological actions in germ cell development. LÄS MER

  3. 2. Computerized Cell and Tissue Analysis

    Författare :Azadeh Fakhrzadeh; Gunilla Borgefors; Cris Luengo Hendriks; Lena Holm; Nasir Rajpoot; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Image processing; Cell; Tissue; Segmentation; Classification; Histology; Computerized Image Processing; Datoriserad bildbehandling;

    Sammanfattning : The latest advances in digital cameras combined with powerful computer software enable us to store high-quality microscopy images of specimen. Studying hundreds of images manually is very time consuming and has the problem of human subjectivity and inconsistency. LÄS MER

  4. 3. Male reproductive health in environmental research : aspects of histological evaluation of testicular tissue

    Författare :Ellinor Spörndly-Nees; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : There is increasing concern that chemicals in the environment are causing male reproductive disorders in animals and humans. This thesis investigated different aspects of histological evaluation of testes, as a tool to measure effects of environmental chemicals on male reproductive health in wild and laboratory animals. LÄS MER

  5. 4. Laminins in stemness and germ cell development in human

    Författare :Magdalena Kurek; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Stem cell niches regulate the fine balance between self-renewal and differentiation of various stem cells. Although crucial hallmarks of stem cell niches, such as the mechanical signalling, neural inputs communicating distant cues, the proximity to blood vessels and the structural support by the surrounding basement membrane (BM), have been evaluated in different niches, little much attention has been directed to the specific composition of the BM. LÄS MER

  7. 5. Preservation of male fertility in childhood acute leukemia : an experimental study addressing novel strategies and putative risks

    Författare :Mi Hou; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Although treatment of cancer in young boys with cytotoxic agents has long been known to cause infertility in the survivors, the mechanisms underlying drug-induced damage to the immature testis remain unclear. A number of clinical issues associated with transplantation of testicular germ cells or tissues also require clarification. LÄS MER