[在含有过氧化产物的不饱和脂肪酸的紫外线照射过程中形成的自由基]

[Free radicals formed during UV-irradiation of unsaturated fatty acids containing peroxidation products].

作者信息

Odinokova G G, Azizova O A, Vladimirov Iu A, Remizov A N, Roshchupkin D I

出版信息

Biofizika. 1979 Mar-Apr;24(2):202-4.

Abstract

On the irradiation of oxidized linolic acid an assymetric ESR signal with g-factor 2.0039 and the linewidth 30--33 Oe has been registered. The signal could be the result of photolysis of hydroperoxides. During prolonged irradiation of all the samples accumulation of alkyl radicals characterized by a symmetric signal with a well-defined ultrafine structure has been observed. An increase of the sample temperature up to 87 K in the presence of oxygen was preceded by transformation of alkyl radical R into RO2. All the radicals disappeared at the temperature of 160 K. All these processes seem to be the first phases of photoperoxidation of unsaturated fat acids in lipid-containing systems, including biological membranes.

摘要

在用氧化亚油酸进行辐照时，记录到了一个g因子为2.0039、线宽为30 - 33奥斯特的不对称电子自旋共振信号。该信号可能是氢过氧化物光解的结果。在对所有样品进行长时间辐照期间，观察到了以具有明确超精细结构的对称信号为特征的烷基自由基的积累。在有氧存在的情况下，将样品温度升至87K之前，烷基自由基R会转化为RO2。所有自由基在160K的温度下消失。所有这些过程似乎是含脂体系（包括生物膜）中不饱和脂肪酸光过氧化的第一阶段。

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