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【答案】应助回帖
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171303240(金币+60, 翻译EPI+1): 非常感谢 2011-08-17 23:24:35
sltmac(金币+1): 追加奖励 2011-08-20 11:45:43
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The results of the single factor experiments showed that MRPs’ ability to scavenge the DPPH free radicals increased as the the reaction temperature and reaction time did, but its ability to scavenge the OH free radicals decreased with the increase of the reaction time. Meanwhile, the reductive ability of MRPs and its ability of scavenging the OH free radicals first increased and then decreased as a result of the increase of the reaction temperature and reaction time. The results of the orthogonal experiments indicated that the highest ability of MRPs, which was prepared with the concentration of 0.5 mg / ml for 90 min at 115℃, scavenging DPPH was 88.73%, its highest reductive ability prepared with the concentration of 0.6 mg / ml for 40 min at 65℃ was A700nm=1.684, and its highest ability to scavenge OH with the concentration of 0.6 mg / ml for 10 min at 65℃ was 98.72%. These results presented that there was always a high antioxidant activity of MRPs in spite of different reaction conditions. With the same concentration, MRPs had got better antioxidant effect than that of Vc and TBHQ. Nevertheless, the antioxidant capacity of MRPs did not entitely depend on the browning degree of the products. |
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