Sökning: "Tocopherol"

Visar resultat 1 - 5 av 50 avhandlingar innehållade ordet Tocopherol.

  1. 1. Exploring Catalytic Tellurium-Based Antioxidants : Synthesis and Evaluation

    Författare :Jia-fei Poon; Lars Engman; John Murphy; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; antioxidant; tellurium; selenium; radical-trapping; chain-breaking; ROS; glutathione peroxidase; tocopherol; aromatic amine; oxidative stress;

    Sammanfattning : This thesis is concerned with the synthesis and evaluation of various tellurium-based chain-breaking antioxidants. The purpose is to find novel regenerable compounds with improved radical-trapping capacity.In the first part of this work, we explore the possibilities to incorporate tellurium into tocopherols and aromatic amines. LÄS MER

  3. 2. Influence of Oxidative Stress on Muscle and Bone

    Författare :Bengt Östman; Karl Michaëlsson; Lars Nordsletten; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; bone mineral density; coenzyme Q10; exercise; ischaemia; isprostanes; muscle; oxidative stress; oxygen radicals; reperfusion; tocopherol; Orthopaedics; Ortopedi; ortopedi; Orthopaedics;

    Sammanfattning : Reactive oxygen species (ROS) induce oxidative stress and although are primarily recognized for playing a deleterious biological role, they can be beneficial to cell systems. ROS are extremely short-lived and normally tightly regulated by antioxidant defence systems. LÄS MER

  4. 3. Determination of Fat-Soluble Vitamins in Foods Based on Supercritical Fluid Extraction

    Författare :Charlotta Turner; Kemiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Supercritical fluid extraction; Solvent collection; Solid phase trapping; SFE; Selectivity; Retinol; Milk powder; Lipase; Food; Enzymatic hydrolysis; Alcoholysis; Candida antarctica; Tocopherol; Vitamins; Analytical chemistry; Analytisk kemi;

    Sammanfattning : Sample clean-up methodologies based on supercritical fluid extraction (SFE) have been developed for determination of fat-soluble vitamins in foods. This thesis focuses on method development, stressing important issues concerning sample pre-treatment, extraction conditions and collection parameters. LÄS MER

  5. 4. Uptake & regulation of ubiquinone & tocopherol

    Författare :Mikael Turunen; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biokemi; Ubiquinone; Tocopherols;

    Sammanfattning : .... LÄS MER

  7. 5. Uptake, induction and distribution of ubiquinone and a-tocopherol

    Författare :Yiyi Zhang; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Ubiquinone (UQ) and a-tocopherol are the major lipid-soluble antioxidants in animal tissues. Appropriate amounts of these lipids have to be present in tissues and subcellular membranes. Uptake from the diet was investigated and it was also analyzed to which extent the tissue amount may be increased by induction of biosynthesis. LÄS MER