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. 2016 Nov 29;16:490. doi: 10.1186/s12906-016-1437-x

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© The Author(s). 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Chromatograms of the qualitative antioxidant activity of 31 out of 120 methanol plant extracts selected based on good quantitative antioxidant activity. Chromatograms were developed with ethyl acetate: methanol: water (40.5:5.4:4) sprayed with DPPH and R_f of compounds with antioxidant activity indicated by inhibition of colour development