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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Impact of Phospholipid-Tocopherol Combinations and Enzyme-Modified Lecithin on the Oxidative Stability of Bulk Oil
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Impact of Phospholipid-Tocopherol Combinations and Enzyme-Modified Lecithin on the Oxidative Stability of Bulk Oil

机译:磷脂 - 生育酚组合和酶改性卵磷脂对散装油氧化稳定性的影响

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摘要

Phosphatidylethanolamine (PE) and phosphatidylserine (PS) have been shown to increase the antioxidant activity of alpha-tocopherol. This study investigated the ability of PE or PS to increase the antioxidant activity of different tocopherol homologues in bulk oil. In addition, the ability of a phospholipase-D-modified lecithin (high in PE) to increase the activity of alpha-tocopherol was determined. Results showed that PE was much more effective than PS at increasing the activity of the tocopherol homologues. The combination of mixed tocopherols with PE presented the greatest increase in antioxidant activity, with hydroperoxides and hexanal lag phases increasing 54 and 53 days compared to the mixed tocopherols alone. Phospholipase-D-modified lecithin increased the antioxidant activity of alpha-tocopherol in stripped bulk oil as well as a commercially refined oil with no added tocopherols. The study indicates that PE is a powerful tool to increase the antioxidant activity of tocopherols in bulk oil and that modification of lecithin to increase the PE concentration could be a commercially viable option to functionalize lecithin, so that its ability to inhibit lipid oxidation increases in bulk oils.
机译:已经证明了磷脂酰乙醇胺(PE)和磷脂酰丝氨酸(PS)以增加α-生育酚的抗氧化活性。本研究研究了PE或PE增加了散装油中不同生育酚同源物的抗氧化活性的能力。此外,测定了磷脂酶-D改性卵磷脂(高分体)以增加α-生育酚活性的能力。结果表明,PE在增加生育酚同源物的活性时比PS更有效。与PE的混合生育酚的组合呈现了抗氧化活性的最大增加,氢过氧化物和己醛滞后相对于单独的混合生育酚相比增加54和53天。磷脂酶-D改性的卵磷脂增加了载体散装油中α-生育酚的抗氧化活性以及商业化精制油,没有添加的生育酚。该研究表明,PE是一种强大的工具,可以增加散装油中生育酚的抗氧化活性,并且卵磷脂的改性增加PE浓度可以是卵磷脂官能化的商业上可行的选择,因此其抑制脂质氧化能力散装增加油。

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