reported that the scavenging ability of soybean on DPPH radicals increased with the increase in radiation doses, ranging from 0.5 to 5 kGy. Jo et al. (2003) indicated that the scavenging ability on DPPH radicals was enhanced in green tea extracts
following irradiation at 10 and 20 kGy. On the other hand, Lampart-Szczapa et al. (2003) found that increasing doses of irradiation decreased the antioxidant effects of lupin rhizome seed extracts at doses of 1, 5 and 10 kGy.