Effect of different lipid systems on antioxidant activity of rosemary constituents carnosol and carnosic acid with and without alpha-tocopherol
Effect of different lipid systems on antioxidant activity of rosemary constituents carnosol and carnosic acid with and without alpha-tocopherol
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DOI：
10.1021/jf950777p
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发表时间：
1996-08-01
影响因子：
6.1
通讯作者：
Frankel, EN
中科院分区：
文献类型：
--
作者：
Hopia, AI;Huang, SW;Frankel, EN
The effect of oxidizing lipid substrate on the antioxidant activity of carnosol and carnosic acid were evaluated in bulk and emulsified systems. In bulk methyl linoleate, carnosic acid was a better antioxidant than carnosol on the basis of conjugated diene hydroperoxide formation, and both were more active than alpha-tocopherol. However, in linoleic acid carnosol was more active than carnosic acid, In bulk corn oil triglycerides, alpha-tocopherol exhibited the most antioxidant activity followed by carnosic acid and carnosol. In all emulsified systems, alpha-tocopherol consistently exhibited more antioxidant activity than carnosol and carnosic. acid. In mixtures, carnosol decreased and carnosic acid increased the oxidative stability of alpha-tocopherol in corn oil. During oxidation carnosic acid and carnosol are converted to unknown compounds which exhibit antioxidant activity. The type and polarity of the lipid system used as a model substrate significantly affect the antioxidant activity of carnosol and carnosic acid.
