title: Antioxidative Activity of Lichen Thamnolia vermicularis in vitro.
abstract: This study was aimed at evaluating the antioxidant activities of methanol extract of Thamnolia vermicularis. The antioxidant activity, reducing power, superoxide anion radical scavenging and free radical scavenging activities were studied. The antioxidant activity of the extract correlated with its concentration (0.2~2 mg/ml) in the reaction mixtures containing linoleic acid. Upto 67% of lipid peroxidation was inhibited by 2 mg/ml of the lichen extract. The extract showed strong free radical scavenging activity similar to that of BHA (positive control) in a manner of concentration dependent. The lichen extract also showed moderate effects on superoxide anoin scavenging activity and reducing power, which was not so effective as that of Quercetin and BHA used as positive controls. This study suggests that T. vermicularis lichen can be used as a novel source of natural antioxidant.
authors.affiliation: Department of Environmental Sciences & Education, Sunchon National University, Sunchon 540-742, Korea.
authors.forename: Heng
authors.initials: H
authors.lastname: Luo
authors.forename: Meirong
authors.initials: M
authors.lastname: Ren
authors.forename: Kwang-Mi
authors.initials: KM
authors.lastname: Lim
authors.forename: Young Jin
authors.initials: YJ
authors.lastname: Koh
authors.forename: Li-Song
authors.initials: LS
authors.lastname: Wang
authors.forename: Jae-Seoun
authors.initials: JS
authors.lastname: Hur
keywords: Antioxidant activity; Free radical scavenging activity; Lichen extract; Natural antioxidant; Thamnolia vermicularis
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