Methods The main fatty acid in vegetable oils was determined using GC - MS and qualitative test of oils was done using national standard method.

方法采用气相色谱-质谱法测定植物油样品中的主要脂肪酸含量，应用国标方法进行油脂定性试验。

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Biodiesel, fatty acid alkyl ester, is made from renewable bioenergy such as vegetable oils and animal fats.

生物柴油，即脂肪酸甲酯，是以动植物油为原料生产的可再生绿色能源。

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Biodiesel, also known as fatty acid alkyl esters which are made from renewable biological sources such as vegetable oils or animal fats, is a sort of renewable energy of friendly environment.

生物柴油是由动植物油脂或长链脂肪酸与甲醇等低碳醇合成脂肪酸甲酯，是一种环境友好型可再生能源。

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Fatty acid content in vegetable oils can vary significantly, a spokeswoman for Spruce Naturals says, depending on factors such as differences in climate, soil, seed variety and how the oil is pressed.

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He searched for years and eventually lighted on a mixture of oleic acid (a fatty acid found in various vegetable oils) and nitrogen-containing compounds called amines.

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