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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Comparative Study of High-Linoleic Acid Vegetable Oils for the Production of Conjugated Linoleic Acid
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Comparative Study of High-Linoleic Acid Vegetable Oils for the Production of Conjugated Linoleic Acid

机译：高油酸植物油生产共轭亚油酸的比较研究

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摘要

Conjugated linoleic acid (CLA) is found in small quantities in dairy and beef products. Obtaining optimum dietary CLA levels from these sources requires an increased intake of saturated fat. A 20% CLA soy oil was produced by UV photoisomerization of soy oil linoleic acid (LA), which is naturally low in saturated fat, but no other high-LA vegetable oils have been studied for their potential as CLA-rich oils. The objectives of this research were to (1) compare flax, sunflower, com, soy, and high-LA safflower oils as sources of CLA-rich vegetable oils using laboratory-scale equipment, (2) compare CLA yields obtained by laboratory-scale and pilot-scale equipment, and (3) compare the oxidative stabilities of laboratory-scale processed oils. High-LA safflower oil produced the most CLA; soy oil produced slightly less, followed by corn, with flax producing very little and sunflower none at all. Minor oil components and turbidity reduced CLA yields, suggesting that oils should be highly refined before CLA production. The pilot-scale system was more effective than the laboratory-scale system due to greater light exposure and larger surface area to volume ratio of the oil samples. The oxidative stabilities of high-LA safflower oil and soy oil were similar before or after irradiation, indicating that these oils are the most suitable for high-CLA production.
机译：在乳制品和牛肉制品中发现少量共轭亚油酸（CLA）。从这些来源获得最佳的饮食CLA水平需要增加饱和脂肪的摄入量。通过对大豆油亚油酸（LA）进行紫外线光异构化，可以生产20％的CLA大豆油，后者的饱和脂肪含量自然较低，但尚未研究其他高LA植物油作为富含CLA的油的潜力。这项研究的目的是（1）使用实验室规模的设备比较亚麻，葵花籽，玉米，大豆，大豆和高LA红花油作为富含CLA的植物油的来源，（2）比较实验室规模获得的CLA产量和中试规模的设备，以及（3）比较实验室规模的加工油的氧化稳定性。高LA红花油产生的CLA最高;豆油的产量略低，其次是玉米，亚麻的产量很少，而向日葵则完全没有。少量的油成分和浊度会降低CLA的产量，这表明在CLA生产之前应高度精炼油。中试规模的系统比实验室规模的系统更有效，这是因为更大的曝光量和更大的油样表面积/体积比。高LA红花油和大豆油在辐照之前或之后的氧化稳定性相似，表明这些油最适合于高CLA的生产。

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