Sökning: "oxidants"

Visar resultat 21 - 25 av 83 avhandlingar innehållade ordet oxidants.

  1. 21. Deciphering the Mechanistic Diversity of Proton-Coupled Electron Transfer Reactions

    Författare :Robin Tyburski; Leif Hammarström; Thomas Moore; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; PCET; Proton Coupled Electron Transfer;

    Sammanfattning : Proton coupled electron transfer is ubiquitous in biological and artificial reaction systems. Much has been done in order to describe the occurrence of such reactions. However, PCET reactivity is often very complex. For instance, there are multiple (stepwise and concerted) mechanistic pathways through which PCET may occur. LÄS MER

  3. 22. Regulation of human thioredoxin and glutaredoxin systems by oxidation and S-nitrosylation

    Författare :Seyed Isaac Hashemy; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : The homeostasis of intracellular redox status has a crucial role in the cell survival and different processes such as DNA synthesis, gene expression, enzymatic activity, etc. This homeostasis is achieved via an intense balance between pro-oxidants and anti-oxidants. LÄS MER

  4. 23. Organocatalytic Transformations with N-Heterocyclic Carbenes - An Investigation of Ionic Liquids as NHC Precatalysts and Aerobic Oxidative Esterifications

    Författare :Linda Ta; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; N-heterocyclic carbene; ionic liquid; multi-component reaction; aerobic oxidation; OTHO; Organocatalysis; green chemistry;

    Sammanfattning : The call for more sustainable processes in the chemical society has led to the development of the field of green chemistry. The Twelve Principles of Green Chemistry serve as guidelines for the design of processes. LÄS MER

  5. 24. Development of Biomimetic Catalytic Systems for Selective Oxidations with H2O2 and O2

    Författare :Mikael Johansson; Jan-Erling Bäckvall; Matthias Beller; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biomimetic oxidations; catalyst immobilization; dihydroxylation; sulfoxidation; flavin; Chemistry; Kemi; Organic Chemistry; organisk kemi;

    Sammanfattning : Four different catalytic systems were studied for biomimetic coupled oxidations using H2O2 or O2. In the first example, osmium tetroxide works as a substrate-selective catalyst for dihydroxylation of olefins. Electron transfer to H2O2 is facilitated by electron transfer mediators (ETMs). LÄS MER

  7. 25. Redox Chemistry in Radiation Induced Dissolution of Spent Nuclear Fuel : from Elementary Reactions to Predictive Modeling

    Författare :Olivia Roth; Mats Jonsson; David W. Shoesmith; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nuclear chemistry; Kärnkemi;

    Sammanfattning : The focus of this doctoral thesis is the redox chemistry involved in radiation induced oxidative dissolution of spent nuclear fuel and UO2 (as a model substance for spent nuclear fuel). It is shown that two electron oxidants are more efficient than one electron oxidants in oxidative dissolution of UO2 at low oxidant concentrations. LÄS MER