Effects of the extract on the activities of superoxide dismutase. Each bar represents a mean ± S.E.M.; n = 5; ap < 0.001; bp < 0.01, cp < 0.05 : significantly different compared to water. αp < 0.001, βp < 0.01, γp < 0.05: significantly different compared to Ethanol and sucrose. EtOH + Su = Ethanol and Sucrose; Ext50, Ext100 and Ext150 = Extract at the respective doses of 50, 100 and 150 mg/kg; Nif = Nifedipine.