Sökning: "radicals"

Visar resultat 11 - 15 av 268 avhandlingar innehållade ordet radicals.

  1. 11. Photoredox catalysis harnessing oxygen-centered radicals

    Författare :Alica Ondrejkova; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; oxygen-centered radical; photoredox catalysis; C-H functionalization; visible light;

    Sammanfattning : Visible light provides an abundant and renewable source of energy with an ample capacity to mediate chemical transformations. Photoredox catalysis utilizes this energy for the generation of high-energy radical intermediates and strategically employs these reactive species in versatile chemical transformations. LÄS MER

  3. 12. Exploring amino-acid radicals and quinone redox chemistry in model proteins

    Författare :Kristina Westerlund; Cecilia Tommos; Astrid Gräslund; Sara Linse; Stockholms universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; amino-acid radicals; quinone redox chemistry; model proteins; protein redesign; electrochemistry; Biochemistry; Biokemi; biokemi; Biochemistry;

    Sammanfattning : Amino-acid radical enzymes have been studied extensively for 30 years but the experimental barriers to determine the thermodynamic properties of their key radical cofactors are so challenging that only a handful of reports exist in the literature. This is a major drawback when trying to understand the long-range radical transfer and/or catalytic mechanisms of this important family of enzymes. LÄS MER

  4. 13. Thiyl radicals, reaction kinetics and redox chemistry

    Författare :Rong Zhao; KTH; []
    Nyckelord :;

    Sammanfattning : In focusing on the free radical chemistry of thiyl radicals,two importantclasses are dealt with, namely, the amino acidalkylthiyl and the acylthiyl radicals, where pulse radiolysisand steady state γ-radiolysis are applied.Amino acid thiyl radicals (RS•), are important in manybiological systems,as intermediates in the repair reactions ofthiols towards targeted carbon-centeredradicals and ascatalytic centers in many enzymatic reactions. LÄS MER

  5. 14. Intracellular radicals in neutrophils - processing and functional implications

    Författare :Halla Björnsdottir; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; neutrophil; reactive oxygen species; neutrophil extracellular traps;

    Sammanfattning : Neutrophils are the most abundant leukocyte in human blood and essential components of our defense against microbial pathogens. These cells can neutralize microbial pathogens by phagocytosis, which involves engulfment and degradation of microbes intracellularly, as well as by the formation of neutrophil extracellular traps (NETs), which are structures released from neutrophils made up of DNA and proteins that capture microbes extracellularly. LÄS MER

  7. 15. Quantum chemical studies of radicals and radical reactions

    Författare :Torbjörn Fängström; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; Kemi; Teoretisk; Kvantkemi;

    Sammanfattning : .... LÄS MER