A 3 g ground sample was extracted subsequently by methanol:water acidified with HCl (50:50 v/v, pH 2, 25 ml/g sample) and acetone: water (70:30 v/v, 25 ml/g sample) with continuously stirring at room temperature for 60 min. The extracts were filtered through a What man No.1 filter paper, followed by centrifugation at 3000 g for 15 min. The supernatants were combined and used formeasuring total polyphenol content and antioxidant capacit