Sökning: "selektivitet"

Visar resultat 6 - 10 av 50 avhandlingar innehållade ordet selektivitet.

  1. 6. Hydroconversion of model Fischer‑Tropsch wax over noble metal/silica-alumina catalysts

    Författare :Francesco Regali; Magali Boutonnet; J.W. Niemantsverdriet; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hydroconversion; Fischer-Tropsch wax; n-hexadecane; bifunctional hydrocracking; hydrogenolysis; silica-alumina; platinum; palladium;

    Sammanfattning : Synthetic fuels produced using the Fischer-Tropsch technology will play an important role in the future of the transportation sector. The Fischer-Tropsch synthesis (FTS) allows converting synthesis gas (CO + H2) into fuels of outstanding quality. The synthesis gas can be obtained from different carbon sources: natural gas, coal and biomass. LÄS MER

  3. 7. Chemo-enzymatic cascades for the synthesis of chiral high-value chemicals

    Författare :Lisa Marx; Per Berglund; Sabine Flitsch; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Chiral amines are frequent in today´s top selling pharmaceuticals. Classical organic synthesis of pharmaceuticals is often work intensive involving many synthesis steps, the use of protection group chemistry, heavy metal catalysts and chiral crystallization techniques. LÄS MER

  4. 8. Development and Application of Enzyme- and Antibody-based Assays with Emphasis on Selectivity, Sensitivity and Stability

    Författare :Catalin Nistor; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; stability; sensitivity; selectivity; cross-reactivity; sample matrix effects; environmental pollutants; enzyme biosensor; immunoassay; Analytical chemistry; Analytisk kemi;

    Sammanfattning : This thesis presents the development, optimisation, and various applications of enzyme-based biosensors and immunoassays, mainly with relevance to environmental analysis. the thesis discusses problems and possible solutions associated with selectivity, sensitivity and robustness of such bioassays with emphasis on various immunoasssay configurations for determination of surfactants, phenols, or drugs, and amperometric biosensors based on enzymes (e. LÄS MER

  5. 9. Aspects on the Regio and Stereo Selectivity in the Hydrolsilylation of 1,3-Dienes

    Författare :Magnus Gustafsson; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Metallorganisk kemi; Organometallic chemistry; Organisk kemi; Organic chemistry; Lewis acid; electrophilic ring closure; asymmetric hydrosilylation; reaction conditions; isoprene; regioselectivity; oxygen; Wilkinsons catalyst; 15N-1H-HMQC; 31P; heterobidentate ligands; catalyst; palladium; epoxy-allylsilanes; rhodium complexes; dienes;

    Sammanfattning : This thesis is a summary of four papers concerning various aspects on the transition metal catalysed hydrosilylation of 1,3-dienes. The hydrosilylation reaction is formally an addition of a hydrosilane to an unsaturated system and depending on the reaction conditions, control of stereo-, regio-, and chemo-selectivity can be achieved. LÄS MER

  7. 10. Naphthoxylosides Investigations into glycosaminoglycan biosynthesis

    Författare :Mårten Jacobsson; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organisk kemi; proteoglycan; Organic chemistry; nucleophilic aromatic substitution; thioether; glycosaminoglycan; xylosides; naphthoxylosides;

    Sammanfattning : Glycosaminoglycans (GAGs) are members of a family of polysaccharide structures consisting mostly of repeating disaccharide units. Most GAGs are attached to specific serine residues in proteins to form proteoglycans (PGs). LÄS MER