... urea excretion 尿素排除作用 urea extraction 尿素抽提 urea extractive crystallization 尿素抽提结晶 ...
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urea extraction method 尿素提取法
The extraction and purification of PUFA from silver carp oil by urea inclusion was studied.
对尿素包合法提取及纯化鲢鱼油中多不饱和脂肪酸（PUFA）的方法进行了研究。
The water resistance of PVA was increased by using urea. The product was tested by the method of solvent extraction. The best modification condition was found.
用尿素对聚乙烯醇基料进行了改性，使其耐水性得到提高。并用溶剂萃取法对其耐水性进行了测试，确定了最佳改性条件。
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