期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 57, 期 9, 页码 3943-3948出版社
AMER CHEMICAL SOC
DOI: 10.1021/jf803358g
关键词
Terpinene; free radical; antioxidant; kinetics; DNA; erythrocyte; linoleic acid
The antioxidant effects of alpha-terpinene (alpha-TH) and gamma-terpinene (gamma-TH) on the oxidation of methyl linoleate (LH), DNA, and erythrocytes induced by 2,2'-azobis(2-amidinopropane hydrochloride) (AAPH) were investigated. The results from erythrocytes and DNA were treated by means of chemical kinetic equations. It was found that either alpha- or gamma-TH was able to scavenge similar to 0.4 radicals when they protected DNA. alpha-TH can trap similar to 0.7 radicals when protecting erythrocytes and can trap similar to 0.5 radicals when protecting LH. gamma-TH can trap similar to 1.2 radicals when protecting erythrocytes and LH. Therefore, the antioxidant effectiveness of gamma-TH was higher than alpha-TH. gamma-TH contained a nonconjugated diene, and the diene in alpha-TH was conjugated. The obtained results implied that the nonconjugated diene benefited for antioxidant capacity more than a conjugated diene. Moreover, the reactions of alpha- and gamma-TH with 2,2'azinobis(3-ethylbenzothiazoline-6-sulfonate) cation radical (ABTS(+center dot)) and 2,2'-diphenyl-1-picrylhydrazyl (DPPH) implicated that alpha- and gamma-TH were able to scavenge radicals directly. However, alpha- and gamma-TH promoted AAPH-induced hemolysis with a high concentration employed.
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