Sökning: "CATALYTIC MECHANISM"

Visar resultat 6 - 10 av 361 avhandlingar innehållade orden CATALYTIC MECHANISM.

  1. 6. A Catalytic and Mechanistic Investigation of Palladium-Phosphine Catalysed Aqueous Hydroxycarbonylation. Steric and Electronic Properties of the Ligands

    Författare :Adriana Ionescu; Kemiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Oorganisk kemi; Inorganic chemistry; Naturvetenskap; Natural science; Isomerisation of hydroxyalkenes; Mechanism; Regioselectivity; Steric and electronic properties; Hydroxycarbonylation of styrene; Water-soluble phosphines; Palladium; Aqueous catalysis;

    Sammanfattning : The steric and electronic properties of eight water-soluble phosphines (1-8) were investigated by different methods. Phosphines 1-6 were tested as ligands in palladium catalysed hydroxycarbonylation of styrene. LÄS MER

  3. 7. Catalytic Formation of Amides

    Författare :Fredrik Tinnis; Hans Adolfsson; Jonathan Williams; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; organisk kemi; Organic Chemistry;

    Sammanfattning : The amide functionality is a highly important chemical bond, found in a great number of synthetic products such as pharmaceuticals, polymers and agrochemicals. The focus of this thesis has been directed towards efficient, mild and environmentally friendly methods for amide formations. LÄS MER

  4. 8. Studies of Catalytic Low-Temperature CO Oxidation over Cobalt Oxide and Related Transition Metal Oxides

    Författare :Jonas Jansson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; catalytic CO oxidation; in-situ XRD; transition metal oxides; low temperature activity; kinetic modelling; in-situ FTIR; in-situ XANES; cobalt oxide; catalyst deactivation; reaction mechanism;

    Sammanfattning : The catalytic oxidation of carbon monoxide at low temperatures is important in many applications. The use of a low temperature active catalyst may lower the emissions during the cold-start of a car, and volatile organic compounds in exhaust gases from stationary sources might be treated without the need of preheating the gas. LÄS MER

  5. 9. Structure determination, thermal stability and catalytic mechanism of hyperthermostable isocitrate dehydrogenases

    Författare :Mikael Karlström; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :X-ray crystallography; isocitrate dehydrogenase; thermostability; catalytic mechanism;

    Sammanfattning : In this thesis, studies on the enzyme isocitrate dehydrogenase (IDH) from the hyperthermophiles Aeropyrum pernix (ApIDH), Thermotoga maritima (TmIDH), Archaeoglobus fulgidus (AfIDH) and Pyrococcus furiosus (PfIDH) are presented. The aim of the described work was to contribute to the understanding of protein thermostability and to study the catalytic mechanism. LÄS MER

  7. 10. Reaction mechanism of metalloenzymes studied by theoretical methods

    Författare :Geng Dong; Beräkningskemi; []
    Nyckelord :Metalloenzymes; Reaction mechanism; QM MM; DFT; DMRG; CAS-srDFT; Big-QM; QTCP;

    Sammanfattning : Metalloenzymes catalyse a wide variety of reactions in nature. In the thesis, I have studied the reaction mechanism of three metalloenzymes, viz. LÄS MER