Fig. 9
![Fig. 9](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs43094-021-00375-4/MediaObjects/43094_2021_375_Fig9_HTML.png)
DPPH free radical scavenging activity of standard and various extracts (25–200 μg/mL) of A. ferruginea leaves and bark is measured in relation to ascorbic acid. Error bars represent standard deviations of independent experiments conducted in triplicate. A. ferruginea Leaf Hexane extract (ACFE-L-H); Ethyl acetate extract (ACFE-L-EA); Ethanol extract (ACFE-L-E); Hydroethanol extract (ACFE-L-HE); Aqueous extract (ACFE-L-Aq); A. ferruginea Bark Hexane extract (ACFE-B-H); Ethyl acetate extract (ACFE-B-EA); Ethanol extract (ACFE-B-E); Hydroethanol extract (ACFE-B-HE); Aqueous extract (ACFE-B-Aq). Std-Standard ascorbic acid