Sökning: "photoproducts"

Visar resultat 1 - 5 av 14 avhandlingar innehållade ordet photoproducts.

  1. 1. Tryptophan photoproducts : regulation of CYP1A1 transcription and modulation of cell growth

    Författare :Yu-Dan Wei; Dieter Schrenk; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; toxikologisk genetik; Genetic Toxicology;

    Sammanfattning : The aryl hydrocarbon receptor (AhR) is a ligand-activated transcription factor involved in the regulation of many drug-metabolizing enzymes. The regulation of cytochrome P4501A1 (CYP1A1) has been most intensively studied. LÄS MER

  3. 2. Temperature effects on UV-B induced DNA damage and repair in plants and a lichen

    Författare :Markus Paulsson; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Tobacco Nicotiana tabacum ; Temperature; Subarctic; Plants; Photoreactivation; Photolyase; Lichen; DNA damage; Cyclobutane pyrimidine dimers CPD ; 6-4 Photoproducts; Cladonia arbuscula ssp. mitis; Ultraviolet radiation; UV-B; Vaccinium vitis-idaea; Plant genetics; Växtgenetik;

    Sammanfattning : All living organisms have DNA and since DNA is essential to life it must be repaired when damaged. UV radiation is one of the major DNA damaging agents, which photosynthetic organisms cannot avoid. LÄS MER

  4. 3. UV-induced DNA damage in humans

    Författare :Vladimir J Bykov; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :32P-HPLC; photoproducts; DNA repair; solar simulated radiation; erythema; sunscreens; humans;

    Sammanfattning : Ultraviolet radiation is considered to be the most harmful part of solar energy affecting man. The depletion of the ozone layer around the Earth increases the total exposure to UV-light. The incidence of skin cancer in man has been shown to be associated with exposure to solar radiation, especially to UV-light. LÄS MER

  5. 4. Fundamental interactions in transition metal reactions

    Författare :Michael R. Coates; Michael Odelius; Markus Kowalewski; Abhik Ghosh; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; quantum chemistry; electronic structure; multiconfigurational; density functional theory; molecular dynamics; excited state molecular dynamics; non-adiabatic dynamics; solvation; organometallic complexes; x-ray absorption spectroscopy; photoelectron spectroscopy; time-resolved spectroscopy; femtosecond; picosecond; kemisk fysik; Chemical Physics;

    Sammanfattning : Transition metal complexes that participate in homogeneous reactions often perform the role of a catalyst, facilitating novel reaction pathways. When these complexes are pushed away from their equilibrium, the arrangement of the coordinating ligands around the metal center is perturbed and new reaction pathways are opened. LÄS MER

  7. 5. Comparative studies of alkylating and N-heterocyclic compounds on different genetic endpoints with special emphasis on amplification of minisatellite sequences

    Författare :Eva Agurell; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Several mutational events are involved in the multistage process of cancer. Genetic instability of tumor DNA is shown in a variety of genetic changes such as point mutations, chromosomal aberrations, aneuploidy, DNA amplification and somatic recombination. LÄS MER