Fig. 4From: Vanda roxburghii chloroform extract as a potential source of polyphenols with antioxidant and cholinesterase inhibitory activities: identification of a strong phenolic antioxidantPercentage of DPPH (a) and hydroxyl (OH) radical (b) scavenging activity and lipid peroxidation inhibitory activity (c) at different concentration of gigantol and the reference standard catechin. Standard was used for comparison. Results represent mean ± SD (n = 3, (P < 0.05)Back to article page