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. 2019 Jun 25;19:149. doi: 10.1186/s12906-019-2559-8

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© The Author(s). 2019

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. 2 — Antioxidant activities of Ammi visnaga (AV), Petroselinum crispum (PC), Hordeum vulgare (HV), and Cymbopogon schoenanthus (CS) extracts in comparison with the Ketosteril (Ks) and butylated hydroxytoluene (BHT). (a) Heat map distribution of the phytochemical content and in vitro antioxidant activities of the four studied extracts, the color distributed from white (low concentrations) to blue (high concentrations) (b) Total antioxidant capacity (c) α, α-Diphenyl-β-picrylhydrazyl (DPPH) scavenging activity (d) 2,2-azino-bis (3-ethylbenzthiazoline-6-sulfonic acid (ABTS) scavenging activity (e) Nitric oxide (NO) scavenging activity. Results are presented as mean ± SE (n = 3). Different letters for the same parameter are significantly different at p < 0.05