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標題: Antioxidative ability of lactic acid bacteria
作者: Lin, M.Y.
Yen, C.L.
關鍵字: lactic acid bacteria;oxidation;antioxidative activity;antioxidative;mechanisms;superoxide-dismutase gene;methyl linoleate;inhibition;radicals;oxygen;autoxidation;peroxidase;metabolism;ascorbate;metals
Project: Journal of Agricultural and Food Chemistry
期刊/報告no:: Journal of Agricultural and Food Chemistry, Volume 47, Issue 4, Page(s) 1460-1466.
Nineteen strains of lactic acid bacteria were investigated for antioxidative activity. These included Lactobacillus acidophilus B, E, N1, 4356, LA-1, and Farr; Lactobacillus bulgaricus 12 278, 448, 449, Lb, 1006, and 11 842; Streptococcus thermophilus 821, MC, 573, 3641, and 19 987; and Bifidobacterium longum B6 and 15 708. Intracellular cell-free extract of all strains demonstrated antioxidative activity with inhibition rates of ascorbate autoxidation in the range of 7-12%. Antioxidative mechanisms including metal ion chelating ability, scavenge of reactive oxygen species, enzyme inhibition, and reducing activity of intracellular cell-free extract of lactic acid bacteria were studied. S. thermophilus 821 had the highest metal ion chelating ability for Fe2+, and B. longum 15 708 showed the highest Cu2+ chelating ability among the 19 strains-tested. All strains demonstrated reactive oxygen species scavenging ability. L. acidophilus E showed, the highest hydroxyl radical scavenging ability, and B. longum B6 had the best hydrogen peroxide scavenging ability. Reducing activity was also found in all strains, Most of the strains tested demonstrated excellent reducing activity. B. longum B6 showed the highest reducing activity among the 19 strains tested. In enzyme inhibition, superoxide dismutase activity was not found in these 19 strains, and the activity of superoxide dismutase was not induced when metal ion Mn2+, Fe2+, or Cu2+Zn2+ was present.
ISSN: 0021-8561
DOI: 10.1021/jf981149l
Appears in Collections:食品暨應用生物科技學系

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