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Anti-oxidant activity of the plant extracts evaluated by the DPPH (A) and the AAPH (B) assays. Values of the DPPH assay are means + or − S.D. of three independent experiments. Asc. acid: ascorbic acid; Tg-BE: T. grandis − bark ethanolic extract; Tg-BH: T. grandis − bark hydro-ethanolic extract; Tg-LE: T. grandis − leaf ethanolic extract; Tg-LH: T. grandis − leaf hydro-ethanolic extract; Va-LE: V. amygdalina − leaf ethanolic extract.
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