Search for dissertations about: "meiosis"

Showing result 16 - 20 of 44 swedish dissertations containing the word meiosis.

  2. 16. Preserving Genetic Integrity in Reproduction: Insights from Telomere Protection and Sperm Head-Tail Junctions

    Author : Kexin Zhang; Göteborgs universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Reproductive biology;

    Abstract : This doctoral thesis embarks on a meticulous exploration of genetic integrity within the expansive domain of reproductive biology. Its overarching objective is to decipher the intricacies that underlie the preservation of hereditary stability across generations. READ MORE

  4. 17. Studies of the chromatin form of yeast Mediator and the function of its tail module

    Author : Miriam Nilsson; Stefan Björklund; Claes Gustafsson; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Mediator complex; Transcriptional regulation; yeast; tail module; transcription; medicinsk biokemi; Medical Biochemistry; molekylärbiologi; Molecular Biology;

    Abstract : Mediator is a large, multifunctional complex that is conserved in eukaryotes. It was first discovered in Saccharomyces cerevisiaeas required for transcriptional activators to function in a reconstituted in vitro system. Mediator is also important for stimulation of basal, unregulated transcription, and transcriptional repression. READ MORE

  5. 18. The mouse oocyte as a model in reproductive toxicology studies

    Author : Jinwen Zhang; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : It is suspected that certain chemicals may cause alterations in female reproduction, including ovarian failure and birth defects. Sub-fecundity, infertility, pregnancy loss, fetal growth retardation, and birth defects are consequences proposed to occur. READ MORE

  6. 19. Aspects of the regulation of human sperm motility

    Author : Pär K G Leijonhufvud; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : In this thesis I address some of the possible causes for oligozoospermia and low sperm motility, two factors that, singly or in combination, are often seen in cases of male subfertility. In the first study we evaluated the effect on human spermatozoa of the toxicity of compounds present in diesel exhaust. READ MORE

  7. 20. Genetic, morphological and chemical variation in the genus Harpagophytum

    Author : Mbaki Muzila; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Harpagophytum procumbens is a valuable medicinal plant but mistakes with plant identification at harvesting, and wilful adulteration using the presumably less efficient H. zeyheri are suggested. A multidisciplinary study with plant material from Botswana was conducted. READ MORE