Determination of antioxidant activity of lichen Cetraria islandica (L) Ach
Determination of antioxidant activity of lichen Cetraria islandica (L) Ach
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DOI：
10.1016/s0378-8741(01)00396-8
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发表时间：
2002-03-01
影响因子：
5.4
通讯作者：
Aslan, A
中科院分区：
文献类型：
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作者：
Gülçin, I;Oktay, M;Aslan, A
本研究旨在评价鸡血藤水提物的抗氧化活性。对其抗氧化活性、还原能力、清除超氧阴离子自由基和清除自由基活性进行了研究。在亚油酸乳状液中，随着萃取物加入量的增加(从50到500杯)，其抗氧化活性也随之增加。大约50、100、250和500杯的水提物显示出比500克的α-生育酚更高的抗氧化活性。样品对亚油酸过氧化的抑制率分别为96%、99%、100%和100%。而500杯α-生育酚对亚油酸乳状液的过氧化抑制率为77%。与抗氧化剂活性一样，其还原能力、清除超氧阴离子自由基能力和清除自由基活性均依赖于浓度，并随样品量的增加而增加。是天然抗氧化剂的潜在来源。(C)2002爱思唯尔科学爱尔兰有限公司。保留所有权利。
The study was aimed at evaluating the antioxidant activity of aqueous extract of C islandica. The antioxidant activity, reducing power, superoxide anion radical scavenging and free radical scavenging activities were studied. The antioxidant activity increased with the increasing amount of extracts (from 50 to 500 mug) added to linoleic acid emulsion. About 50, 100, 250, and 500 mug of aqueous extract of C islandica showed higher antioxidant activity than 500 jig of a-tocopherol. The samples showed 96, 99, 100, and 100% inhibition on peroxidation of linoleic acid, respectively. On the other hand, the 500 mug of alpha-tocopherol showed 77% inhibition on peroxidation on linoleic acid emulsion. Like antioxidant activity, the reducing power, superoxide anion radical scavenging and free radical scavenging activities of C. islandica depends on concentration and increasing with increased amount of sample, The results obtained in the present study indicate that C. islandica. is a potential source of natural antioxidant. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved.