Sökning: "activity and selectivity"

Visar resultat 1 - 5 av 237 avhandlingar innehållade orden activity and selectivity.

  1. 1. Lipase Specificity and Selectivity : Engineering, Kinetics and Applied Catalysis

    Författare :Mohamad Takwa; Karl Hult; Bernhard Hauer; KTH; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Biochemistry; Biokemi;

    Sammanfattning : The specificity and selectivity of the enzyme Candida antarctica lipase B (CALB) were studiedfor several substrates and applications.With help of molecular modeling, the active site of CALB was redesigned for the ring openingpolymerization of D,D‐lactide. LÄS MER

  3. 2. Beta-Glycosidases from Hyperthermophiles as Biocatalysts

    Författare :Therese Hansson; Avdelningen för klinisk kemi och farmakologi; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Bioteknik; Biochemical technology; Biokemisk teknik; Proteins; enzymology; Proteiner; enzymologi; Biotechnology; high temperatures; water activity; activity; selectivity; hexanol; hexyl-b-glycoside; galacto-oligosaccharides; lactose; hyperthermostable b-glycosidase; hydrolysis; optimisation; transglycosylation;

    Sammanfattning : The thesis concerns glycosyl transfer with use of b-glycosidases, most of them from hyperthermophilic organisms. Both optimisation of the reaction conditions and protein engineering in terms of site-directed mutagenesis were used to improve b-glycosidase-catalysed reactions. LÄS MER

  4. 3. Muscarinic receptors and urinary bladder selectivity : Properties that determine the organ selectivity of compounds

    Författare :Staffan Sundquist; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmaceutical biosciences; bladder; muscarinic; receptor subtypes; smooth muscle; multivariate; Farmaceutisk biovetenskap; Biopharmacy; Biofarmaci; galenisk farmaci; Pharmaceutics;

    Sammanfattning : Urinary bladder contraction is mainly mediated by activation of muscarinic acetylcholine receptors (mAChR). Muscarinic antagonists are often effective in treatment of unstable bladder. The effectiveness of this treatment has often been limited by side effects as dry mouth. LÄS MER

  5. 4. Engineered Alcohol Dehydrogenases for Stereoselective Chemical Transformations

    Författare :Thilak Reddy Enugala; Mikael Widersten; Manfred T. Reetz; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; alcohol dehydrogenase-A; biocatalysts; protein engineering; enzyme kinetics; sec-alcohols; ketones; stereoselectivity; regioselectivity; substrate selectivity and promiscuity.; Biokemi; Biochemistry;

    Sammanfattning : Enzymes are biomolecules built from amino acids and catalyze the chemical transformations in a cell. Enzymes are by nature stereoselective, biodegradable, environmentally friendly, and can perform catalysis in aqueous solutions and at ambient temperatures. LÄS MER

  7. 5. Nanomaterials for membranes and catalysts

    Författare :Stylianos Nassos; Sven Järås; Carina Lagergren; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nanotechnology; microemulsion; nanoparticles; hydrogen production; CO2 capture; selective catalytic oxidation of ammonia; activity; gasified biomass; Chemical engineering; Kemiteknik;

    Sammanfattning : Nanotechnology is a relatively new research topic that attracts increasing interest from scientists and engineers all over the world, due to its novel applications. The use of nanomaterials has extended to a broad range of applications, for example chemical synthesis, microporous media synthesis and catalytic combustion, contributing to achievement of improved or promising results. LÄS MER