DPPH
化学
抗氧化剂
铁氰化钾
食品科学
功能性食品
传统医学
生物化学
有机化学
医学
作者
Adriana Ordóñez,José Dorado Gómez,Marta Amelia Vattuone,M.I. lsla
出处
期刊:Food Chemistry
[Elsevier]
日期:2006-08-01
卷期号:97 (3): 452-458
被引量:794
标识
DOI:10.1016/j.foodchem.2005.05.024
摘要
The antioxidant activities (AA) of Sechium edule extracts were tested by three established in vitro methods, namely reducing power, β-carotene linoleate model and 1,1- diphenyl-2 picrylhydrazyl (DPPH) radical-scavenging. Leaf ethanolic extracts and leaf and seed water extracts showed strong inhibitory activity by β-carotene bleaching (AA values of 90%). Furthermore, these extracts exerted hydrogen-donating ability in the presence of DDPH stable radical (IC50 2 μg/ml). These extracts also showed strong reducing power by the potassium ferricyanide reduction method. Leaf and seed extracts may be exploited as biopreservatives in food applications as well as for health supplements or functional food, to aleviate oxidative stress.
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