Search for dissertations about: "thesis about antioxidant"

Showing result 1 - 5 of 34 swedish dissertations containing the words thesis about antioxidant.

  2. 1. Regenerable Organochalcogen Antioxidants : An Explorative Study

    Author : Jiajie Yan; Lars Engman; David J. Procter; Uppsala universitet; []
    Keywords : 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;

    Abstract : 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. READ MORE

  4. 2. Exploring Novel Catalytic Chalcogenide Antioxidants

    Author : Henrik Johansson; Lars Engman; Helena Grennberg; Troels Skrydstrup; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; antioxidant; tellurium; selenium; catalytic; toxicity; ROS; neutrophil; glutathione peroxidase mimic; macrophage.; Organic chemistry; Organisk kemi; Kemi med inriktning mot organisk kemi; Chemistry with specialization in Organic Chemistry;

    Abstract : This thesis is concerned with the synthesis and evaluation of regenerable chalcogen containing antioxidants. Variously substituted 2,3-dihydrobenzo[b]selenophene-5-ol antioxidants were evaluated in order to gain information about structure/reactivity-relationships. READ MORE

  5. 3. Antioxidants in Bolivian Plant Foods. Antioxidant Capacity, Flavonoids and other Phenolic Compounds

    Author : Mauricio Penarrieta; Livsmedelsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Bolivia; Foods; Flavonoids; Phenolic Compounds; Total Antioxidant Capacity; HPLC.;

    Abstract : The total antioxidant capacity was measured and the major phenolic and flavonoid compounds were identified and quantified in a selection of Bolivian crops growing at different altitudes above seal level (a.s.l.). READ MORE

  6. 4. Extraction and chromatography of bioactive compounds in complex samples using supercritical CO2 technology

    Author : Said Alhamimi; Centrum för analys och syntes; []
    Keywords : Supercritical CO2; Chromatography; Extraction; Mass transfer; Solubility;

    Abstract : Bioactive compounds found in plants have been of interest to man since ancient times. These compounds have the ability to modulate the metabolic processes in our bodies, which suggests that they may promote better health. Bioactive compounds vary in their chemical structure, polarity, stability and biological activity. READ MORE

  7. 5. Biophysical studies of cell membrane receptors for the growth factors PDGP and EGF : Aspects on lateral and aggregation

    Author : Pia Ljungquist-Höddelius; Carl-Henrik Heldin; Linköpings universitet; []
    Keywords : MEDICINE; MEDICIN;

    Abstract : When extracellular growth factors bind to their specific cell surface receptors, they elicit a cascade of biochemical events, including tyrosine kinase-mediated phosphorylation and changes in intracellular free ca2+, leading to cell differentiation and proliferation. However, direct effects of ligand-binding on the receptors are poorly understood. READ MORE