A volume of 1.5 ml of each solution was added to 1.5 ml of a methanol DPPH•solution (0.2 mmol/l). The absorbance (A) was measured at 515 nm after 30 min at 25◦C. The blank control consists of 1.5 ml of methanol DPPH•solution mixed with 1.5 ml of methanol without the extract. The radical scavenging activity of each solution is calculated as the inhibition percentage using Eq.(1)