Sökning: "Mutation"

Visar resultat 21 - 25 av 1258 avhandlingar innehållade ordet Mutation.

  1. 21. A Multitype Branching Processes Approach to the Evolutionary Dynamics of Escape

    Författare :Maria Conceicao Serra; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Galton-Watson branching processes; multitype; decomposable processes; population dynamics; extinction; mutation; path to escape; waiting time to escape; Galton-Watson branching processes;

    Sammanfattning : Evolutionary dynamics of escape is a recent development in theoretical biology. It is an attempt to predict possible patterns of population dynamics for a certain strain of viruses placed in a hostile environment. The only way to escape extinction for the virus is to find a new form better adapted to the new environment. LÄS MER

  3. 22. Gastrointestinal stromal tumors. Pathogenetic mechanisms, phenotypic characterization and prognosis

    Författare :Johanna Andersson; Göteborgs universitet; []
    Nyckelord :Gastrointestinal stromal tumor GIST ; neurofibromatosis type I NF1 ; mutation; prognosis; denaturating high performance liquid chromatography dHPLC ; sequencing; KIT; PDGFRA; NF1;

    Sammanfattning : Gastrointestinal stromal tumor (GIST), the most common non-epithelial neoplasm of the gastrointestinal tract, has historically been problematic both conceptually and clinically. Recently, GIST has been shown to share phenotypic features with the interstitial cells of Cajal (ICC), including the almost uniform expression of the tyrosine kinase receptor KIT. LÄS MER

  4. 23. Short and long-term effects of exposure to low dose and low dose rate of gamma radiation : using in vitro and in vivo models

    Författare :Traimate Sangsuwan; Siamak Haghdoost; Eva Forssell-Aronsson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Low dose; Low dose rate; High dose rate; Ionizing radiation; Adaptive response; Senescence; Premature senescence; Oxidative stress; Drosophila embryo; Mutation; DNA repair; molekylär biovetenskap; Molecular Bioscience;

    Sammanfattning : Assessment of human health risks from exposure to ionizing radiation (IR) is mainly based on the extrapolation of results from epidemiological studies on populations exposed to relatively high doses and often at high dose rates (HDR). Risk estimates after exposure to low doses and in particular at low dose rates (LDR) remain controversial due to a lack of epidemiological evidence. LÄS MER

  5. 24. Detection and analysis of genetic alterations in normal skin and skin tumours

    Författare :Åsa Sivertsson; KTH; []
    Nyckelord :single cell; DNA sequencing; p53; mutation; UV; BCC; pyrosequencing; malignant melanoma; N-ras;

    Sammanfattning : The investigation of genetic alterations in cancer-relatedgenes is useful for research, prognostic and therapeuticpurposes. However, the genetic heterogeneity that often occursduring tumour progression can make correct analysischallenging. LÄS MER

  7. 25. Quantitative analysis of disease associated mutations and sequence variants

    Författare :Charlotta Olsson; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Genetics; Kvantifiering; PCR-metoder; SNP; mutation; Genetik; Clinical genetics; Klinisk genetik; Molecular Medicine; molekylär medicin genetik och patologi ;

    Sammanfattning : A solid-phase sequencing technique was applied to quantify the mitochondrial A3243G mutation in three families with maternally inherited diabetes and deafness. A correlation between the level of heteroplasmy and age at onset was found. LÄS MER