Sökning: "antioxidant"

Visar resultat 1 - 5 av 271 avhandlingar innehållade ordet antioxidant.

  1. 1. Measurement and Evaluation of Antioxidant Status and Relation to Oxidative Stress in Humans

    Författare :Cecilia Nälsén; Bengt Vessby; Margareta Öhrvall; Lars Ove Dragsted; Uppsala universitet; []
    Nyckelord :Nutrition; antioxidant; antioxidant status; antioxidant capacity; oxidative stress; lipid peroxidation; F2-isoprostanes; dietary factors; vitamin E; n-3 fatty acids; human; Näringslära;

    Sammanfattning : Numerous diseases are associated with reduced antioxidant defence and oxidative stress. The antioxidant defence includes dietary and endogenous antioxidants and involves complex interactions between them. LÄS MER

  2. 2. Design, Synthesis and Evaluation of Catalytic Chalcogenide Antioxidants

    Författare :David Shanks; Lars Engman; John C Walton; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; antioxidant; tellurium; selenium; computational design; homolytic substitution; radical cyclisation; microwave-assisted synthesis; antioxidant regeneration; Organisk kemi; Organic chemistry; Organisk kemi;

    Sammanfattning : This thesis describes the design, synthesis and evaluation of novel chalcogenide antioxidants.A computational model for the prediction of antioxidant properties of chalcogen-containing antioxidants has been developed. LÄS MER

  3. 3. Regenerable Organochalcogen Antioxidants : An Explorative Study

    Författare :Jiajie Yan; Lars Engman; David J. Procter; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; autoxidation; antioxidant; selenium; tellurium; regenerable; multifunctional; radical-trapping; hydroperoxide-decomposing; co-antioxidant; Chemistry with specialization in Organic Chemistry; Kemi med inriktning mot organisk kemi;

    Sammanfattning : Antioxidants are widely used to protect organic materials from damages caused by autoxidation, an oxidation process that occurs under normal aerobic conditions. In this thesis, novel multifunctional organoselenium and organotellurium antioxidants were designed, synthesized, and evaluated in search for compounds with better radical-trapping capacity, regenerability, and hydroperoxide-decomposing ability. LÄS MER

  4. 4. Airway antioxidant responses to oxidative air pollution and vitamin supplementation

    Författare :Annelie Behndig; Anders Blomberg; Ian S Mudway; Ragnberth Helleday; Isabelle Romieu; Umeå universitet; []
    Nyckelord :Medicine; air pollution; ozone; diesel exhaust; airway inflammation; antioxidant; vitamin C; dehydroascorbate; vitamin supplementation; Medicin; lungmedicin; Lung Medicine;

    Sammanfattning : Air pollutants, such as ozone (O3) and diesel exhaust particles, elicit oxidative stress in the lung. Antioxidants within the respiratory tract lining fluid (RTLF) protect the underlying tissue from oxidative injury. LÄS MER

  5. 5. Antioxidant Activity of Bolivian Plant Secondary Metabolites

    Författare :Patricia Mollinedo; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; cytoprotection; Beta-carotene; TBARS; TEAC; ABTS; antioxidant activity; secondarymetabolites; Highland plains; plants; photoprotection; Organic chemistry; Organisk kemi;

    Sammanfattning : Certain climatologically-adverse conditions in the basin of the Poopo Lake, located on the high plateau of the Bolivian Altiplano, have prevented the existence of a reliable agricultural system and the impact on the population of the area has been severe. These problems have been the main motivation in choosing this region for this particular study. LÄS MER