Search for dissertations about: "acyl migration"

Found 5 swedish dissertations containing the words acyl migration.

  2. 1. Enzymatic Synthesis of Mixed Acid Phospholipids

    Author : Dietlind Adlercreutz; Bioteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; lysophosphatidylcholine; phosphatidylcholine; acyl migration; equilibrium; organic solvent; lipase; phospholipase; Biotechnology; Bioteknik;

    Abstract : Mixed acid phospholipids are valuable compounds, which are used mainly in membrane- and lipoprotein research and in liposome technology. The chemical synthesis of these special lipids is rather difficult and involves both toxic chemicals and harsh reaction conditions, which makes the products less attractive for medical and biological applications. READ MORE

  4. 2. Lipase-catalyzed production of structured triacylglycerols

    Author : Ariana Causevic; Bioteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structured lipids; Lipase; Acyl migration; Immobilization; Lipid analysis; Transesterification; Water activity;

    Abstract : Vegetable oils and fats are major energy sources but also play an essential part in the physical and chemical properties of food products. The current change in the climate is affecting harvest yields, leading to a shortage and increased prices of raw materials that are difficult to replace. READ MORE

  5. 3. Ruthenium-catalyzed redox reactions and lipase-catalyzed asymmetric transformations of alcohols

    Author : Michaela Edin; Jan-E. Bäckvall; Manfred T. Reetz; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; ruthenium; lipase; catalysis; alcohols; diols; Chemistry; Kemi;

    Abstract : The major part of this thesis describes the synthesis of enantiopure alcohols and diols by combining ruthenium-catalyzed redox reactions that lead to racemization or epimerization and lipase-catalyzed asymmetric trans-formations in one-pot.A mechanistic study of the unexpected facile formation of meso-diacetate products found in enzyme-catalyzed acetylations of alkanediols with Candida antarctica lipase B (CALB) was first performed. READ MORE

  6. 4. Deracemization of Functionalized Alcohols via Combined Ruthenium and Enzyme Catalysis

    Author : Ann-Britt L. Fransson; Jan-Erling Bäckvall; Hans-Erik Högberg; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; Organisk kemi;

    Abstract : The major part of this thesis describes the synthesis of enantiopure alcohols and diols by combining ruthenium-catalyzed racemization or epimerization and lipase-catalyzed asymmetric transformations. A minor part of this thesis is focused on ruthenium-catalyzed redox reactions for transfer hydrogenation of 1,3-cycloalkanediketones. READ MORE

  7. 5. Localisation of Fluorescent Probes and the estimation of Lipid Nanodomain sizes by modern fluorescence techniques

    Author : Radek Sachl; Lennart B-Å Johansson; Martin Hof; Mats Almgren; Tomas Obsil; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Electronic energy transfer; fluorescence; rafts; lipid bilayer; bicelles; micelles; fysikalisk kemi; Physical Chemistry;

    Abstract : The thesis is divided into two major parts. The first part focuses on the localisation of probes in lipid/polymeric bilayers and in GM1 micelles. Included in this thesis is a new approach based on electronic energy transfer/migration (FRET/DDEM), which efficiently determines transversal positions of fluorescent molecules in lipid bilayers. READ MORE