J4 ›› 2012, Vol. 11 ›› Issue (10): 31-32.
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Objective：The extract of walnut leaves show strong antioxidant activities, but the quantities of active components are
different according to different growth stages. The time of picking walnuts leaf depends on comparison of oxidation resistance of walnuts leaf extract picked from different months. Methods: The same doses of walnut leaf extract harvested in different months were added into edible vegetable oil. Extracts from different months were compared with each other. All of these extracts were divided into three groups, with equal BHT, BHA and blank in them. And then they were observed after some time. Results: Among them, the antioxidant activities of acetone extract in September. had the highest antioxidant activity, and better than BHT. Conclusion: The antioxidation effects of Walnut leaves are different in different periods, and the best one is in September.
