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Article
Moderate antioxidative efficiencies of flavonoids during peroxidation of methyl linoleate in homogeneous and micellar solutions
The relative reactivities as well as the stoichiometric coefficients for a number of flavonoids, catechols, and—for comparison—standard phenolic antioxidants were determined by analyzing the kinetics of oxygen...
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Chapter and Conference Paper
Structural Principles of Flavonoid Antioxidants
Flavonoids are the most ubiquitous and structurally evolved class of plant phenolic compounds. Based on a few principal structures (see Fig. 1), multitudinous hydroxylation, methoxylation, and glycosylation pa...
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Chapter
Screening for Plant Antioxidants
Chloroplasts of green plants produce oxygen by light-driven reactions and contain photodynamically active molecules which catalyze photo-oxidations. The latter processes and unavoidable leakage of electrons, r...
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Article
Direct and indirect measurements of oxygen radicals
Instead of covering the available detection methods in detail it is attempted to highlight the ambiguities inherent in oxygen radical detection under in vivo conditions. Due to physicochemical properties of th...
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Article
Radical reactions in vivo - an overview
Generation of radicals in vivo depends on metabolic activities. The reactions are usually influenced by(i) the presence and concentration of oxygen;(ii) the availability of transition metals (effects of binding a...
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Article
Determination of sulfite radical (SO 3 ⋅ −) reaction rate constants by means of competition kinetics
The sulfite radical anion (SO 3 ⋅ −) was found to react rapidly with the flavonoid quercetin (k = 2.5 × 108 dm3mol−1 s−1) and the carotenoids crocin (k = 1.0 ×...
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Chapter and Conference Paper
Oxidative Prozesse in Linsen verschiedener dominanter Kataraktmutanten der Maus
Oxidative Prozesse spielen neben osmotischen Prozessen und Veränderungen der Kristalline eine bedeutende Rolle bei der Kataraktentstehung (s. J. Graw: ,,Beteiligung oxidativer Prozesse bei der Kararaktentstehu...
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Chapter and Conference Paper
Bedeutung und Wirkungsweise von Antioxidanzien
Aus den Beiträgen von Flohé, Saran und Elstner läßt sich entnehmen, daß aufgrund ihrer Reaktivität verschiedenste schädliche Wirkungen von Sauerstoffradikalen ausgehen. Es ist nun gleicherweise anzunehmen, daß...