Oxidation of lipids. XIII. Antioxidant activities of .ALPHA.-, .BETA.-, .GAMMA.-, and .DELTA.-tocopherols.

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概要

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• The antioxidant activities of α-, β-, γ-, and δ-tocopherols were studied. They were all effective as antioxidant in the oxidations of methyl linoleate in homogeneous solution. When one of the four tocopherols was used alone, they were consumed at the same rate and they suppressed the oxidation for the same period. However, the stabilities of chromanyloxyl radicals derived from the corresponding tocopherols varied considerably and decreased in the order α>β≅γ>δ -chromanyloxyl radicals. α-Tocopherol reacts quite rapidly with β-, γ-, and δ-chromanyloxyl radicals to give α-chromanyloxyl radical and β-, γ-, and δ-tocopherols respectively. Accordingly, when the four tocopherols were used together, α-tocopherol was consumed first, then β- and γ-tocopherols were consumed, and δ-tocopherol began to decrease after most of α-, β-, γ-tocopherols were depleted.

• 公益社団法人 日本化学会の論文

著者

• Yamamoto Yorihiro

  Department Of Bionics Tokyo University Of Technology

• Kamiya Yoshio

  Department of Applied Chemistry Faculty of Engineering The University of Tokyo

• Yoshikawa Yasuyuki

  Department of Reaction Chemistry, Faculty of Engineering, University of Tokyo, Hongo

• Tsuchiya Jyunichi

  Department of Reaction Chemistry, Faculty of Engineering, University of Tokyo

• Niki Etsuo

  Department of Reaction Chemistry, Faculty of Engineering, The University of Tokyo

• Yoshikawa Yasuyuki

  Department of Reaction Chemistry, Faculty of Engineering, The University of Tokyo

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