An aliquot 3 mL of the DPPH radical solution (0.3 mM, in
methanol) was added to 1 mg/mL of the extract. The mixture
was shaken and left to stand for 30 min at room temperature
in the dark. The absorbance was measured at 517 nm. The
radical scavenging effect was calculated by the following
equation: scavenging activity (%) = 100 × [(Abs of control –
Abs of Sample)/ Abs of control].The experiment was
performed in triplicate