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。
2
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.