The inhibitory concentration (IC50), efficiency concentration (EC50) and anti-radical power (ARP) were
estimated and calculated as described by Kroyer (2004).
Reducing power of extracts (1.0 mg/ml in MeOH) was determined
by ferric reducing antioxidant power (FRAP) assay (Apati et al.,
2004) and quercetin was used as reference standard. Reducing
power was expressed as ascorbic acid equivalent (1 mM = 1 ASE).
The ASE/ml value is inversely proportional to reducing power.