Peroxyl radical-scavenging activity

Maitra I, Marcocci L, Droy-Lefaix MT, Packer L. (1995). Peroxyl radical scavenging activity of Ginkgo biloba extract EGb 761. Biochem Pharmacol. 49(11) 1649-55. 

Maitra, I., Marcocci, L., Droy-Lefaix, M.T., and Packer, L. (1995) Peroxyl Radical Scavenging Activity of Ginkgo biloba Extract EGb 761, Biochem. Pharmacol. 49,1649-1655. 

Peroxyl Radical-Scavenging Activity of Flavonoids, Other Phenolic Compounds, and Unrefined Seed Oils... 

Figure 6. The peroxyl radical-scavenging activities of various vegetable oils (A) and flavonoid and phenolic compounds (B). Oils in markets. Adapted with permission from references 8 and 18, Copyrights 1999American Association for Cancer Research (A) and ACS (B),...

Anti-Tumor-Promoter Effect and Alkyl Peroxyl Radical Scavenging Activity of Boiled Vegetables Soup Compared with Cold Water-Extracts of Fresh Vegetabies... 

Galano A, Francisco-Marquez M (2009) Peroxyl radical scavenging activity of garlic 2-propenesulfenic acid vs allicin. J Phys Chem B 113 16077-16081 Galano A, Francisco-Marquez M (2009) Reactions of OOH radical with P-carotene, lycopene, and torulene hydrogen atom transfer and adduct formation mechanisms. J Phys ChemB 113 11338-11345... 

The antioxidant property of ferulic acid and related compounds from rice bran was reported by Kikuzaki et al, (2002). Their results indicated that these compounds elicit their antioxidant function through radical scavenging activity and their affinity with lipid substrates. Another recent study reported by Butterfield et al, (2002) demonstrated that ferulic acid offers antioxidant protection against hydroxyl and peroxyl radical oxidation in synaptosomal and neuronal cell culture systems in vitro. The effect of ferulic acid on blood pressure (BP) was investigated in spontaneously hypertensive rats (SHR). After oral administration of ferulic acid the systolic blood pressure (SBP) decreased in a dose-dependent manner. There was a significant correlation between plasma ferulic acid and changes in the SBP of the tail artery, suggesting... 

The efficiency of the antioxidant will depend on the ratio of the rates of Reaaion 2.10 to those for Reactions 2.11 and 2.12. A compound that is capable of reducing the antioxidant radical (A ) back to the parent compound (AH) will compete with Reactions 2.11 and 2.12, and so increase the efficiency of peroxyl radical scavenging (Reaction 2.10). In addition, the steady-state concentration of the antioxidant wiU be maintained at its initial concentration for a longer period and this should also result in more efficient suppression of the peroxidation reaction. The net result of these effects will be a synergistic enhancement of antioxidant activity. 

Muller L, Frohlich K, Bohm V. Comparative antioxidant activities of carotenoids measured by ferric reducing antioxidant power (FRAP), ABTS bleaching assay (aTEAC), DPPH assay and peroxyl radical scavenging assay. Food Chemistry. 2011 129 139-148... 

A number of studies have examined the antioxidant activities of chitosan from various sources. Park et al. (2004a) prepared three kinds of partially deacetylated hetero-chitosans such as 90% deacetylated, 75% deacetylated, and 50% deacetylated chitosan from crab chitin, and their antioxidant properties were measured using electron spin resonance spectrometry. Park and coworkers found that their antioxidant activities were dependent on the DD, and the 90% deacetylated chitosan showed the highest free radical scavenging activities. Yen et al. (2008) also found that a sample with more amino groups at the C-2 position showed the highest antioxidant activity. Tomida et al. (2009) examined the protective effects of seven different MW chitosans on plasma protein from oxidation by peroxyl radicals. In the ability to protect plasma protein from... 

Antioxidant activities of caffeine (1,3,7-trimethylxanthine) and its main metabolites was compared. Caffeine, 1,7-dimethylxanthine, and 3,7-dimethylxanthine did not show any peroxyl radical-scavenging capacity at concentration up to 100 fxM. Flowever, the relative antioxidant activities (with respect to Trolox) of 1-methyl-xanthine and 1-methyluric acid were 0.82 and 0.58, respectively (L9). 

Chimi, H., GUlard, J., Gillard, R, and Pahman, M. Peroxyl and hydroxyl radical scavenging activity of some natural antioxidants. Journal of the American Oil Chemists Society, 68, 307-312. 1991. 

Dugas Jr. AJ, Castaneda-Acosta J, Bonin GC, Price KL, Fischer NH, Winston GW. Evaluation of the total peroxyl radical-scavenging capacity of flavonoids Structure-activity relationships. J Nat Prod. 

The antioxidant activity of sage Salvia officinalis) is related with the presence of antioxidants such as camosol, camosic acid, rosma-nol, and rosmarinic acid (Cuvelier et al. 1996). Camosol and camosic acid possess good peroxyl and hydroxyl radical-scavenging activity... 

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