Oxidation Products of Vitamin E
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- YAMAUCHI Ryo
- Department of Food Science, Faculty of Agriculture, Gifu University
Bibliographic Information
- Other Title
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- ビタミンEの酸化生成物
- ビタミン E ノ サンカ セイセイブツ
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Abstract
Examination was made of oxidation products of vitamin E (α-tocopherol) during the peroxidation of unsaturated lipids and decomposition of a lipid hydroperoxide. Free-radical scavenging reactions of α-tocopherol take place via the α-tocopheroxyl radical as an intermediate. Should a suitable free radical be present, a non-radical product is formed from coupling of the free radical with the α-tocopheroxyl radical. The reaction products of α-tocopherol with lipid-peroxyl radicals are 8a- (lipid-dioxy) -α-tocopherones. When the supply of oxygen is insufficient, α-tocopherol traps carbon-centered radicals of lipids to form 6-O-lipid-α-tocopherols. The dimer and trimer of α-tocopherol are formed by bimolecular self-reaction of the α-tocopheroxyl radical in a reaction mixture containing excess α-tocopherol. The reaction products of other vitamin E compounds (γ-and δ-tocopherols) with lipid-peroxyl radicals are much the same as those formed from α-tocopherol. The tocopheroxyl radicals of γ-and δ-tocopherols prefer to react with each other to form dimeric products that are still possessing high capacity to function as free radical scavengers.
Journal
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- Journal of Japan Oil Chemists' Society
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Journal of Japan Oil Chemists' Society 48 (2), 95-102,148, 1999
Japan Oil Chemists' Society
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Details 詳細情報について
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- CRID
- 1390001204091939968
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- NII Article ID
- 10002278256
- 10017634550
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- NII Book ID
- AN10512582
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- ISSN
- 18841996
- 13418327
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- NDL BIB ID
- 4656261
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed