Water soluble products of UV-irradiated autoxidized linoleic and linolenic acids.
Water soluble products of UV-irradiated autoxidized linoleic and linolenic acids.
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经紫外线照射的自氧化亚油酸和亚麻酸的水溶性产品。
作者：
N. Baker;L. Wilson
紫外光引发的亚油酸和亚麻酸在水中乳化的自氧化的水溶性产物被分离成挥发性和相对不挥发的组分，每个组分都与硫代巴比妥酸（TBA）和过氧化物酶反应。挥发性TBA反应性化合物可能是丙二醛，挥发性过氧化物酶反应性化合物是过氧化氢。在挥发性馏分中存在吸收UV光的其他化合物。不挥发性馏分的薄层层析后，对TBA和过氧化物酶的反应性被发现在同一地点。估算了过氧化氢、丙二醛、“氢过氧化物”和其他TBA反应性化合物的近似摩尔产率。亚油酸的“过氧化氢”与TBA反应性的比率低于亚麻酸。相对不挥发性化合物的质量约为20倍以上，从过氧化物酶或TBA测定氧化亚麻酸的水提取物的预测。水提取物的性质与其他乳化亚油酸甲酯长时间自氧化（无紫外线照射）产物所示的性质相似。
The water-soluble products of the UV-initiated autoxidation of linoleic and linolenic acids emulsified in water were separated into volatile and relatively involatile components, each of which reacted with both thiobarbituric acid (TBA) and peroxidase. The volatile TBA-reactive compound is probably malonaldehyde and the volatile peroxidase-reactive compound is hydrogen peroxide. Additional compounds which absorb UV light were present in the volatile fraction. After thin-layer chromatography of the involatile fraction, reactivity toward TBA and peroxidase was found in the same spot. Approximate molar yields of hydrogen peroxide, malonaldehyde, "hydroperoxides", and other TBA-reactive compounds were estimated. The ratio of "hydroperoxide" to TBA reactivity was lower for linoleic than for linolenic acid. The mass of relatively involatile compounds was about 20 times greater than that predicted from either peroxidase or TBA assays of water extracts of oxidized linolenic acid. The properties of the water extract were similar to those shown by others for the products of prolonged autoxidation (without UV-irradiation) of emulsified methyl linoleate.