extraction n. 1.抽出,拔出。 2.【化学】提取(法);萃取(法);回收物,提出物;精炼。 3.精选,摘要。 4.血统,家世,出身。 5.【数学】开方,求根。 spirit of the first extraction 原汁酒。 a man of foreign extraction 外国(血统的)人。 extractions from a book 一本书的内容摘录。 an extraction of 81 percent 百分之八十一的出粉率,八一粉。 the extraction of root 【数学】开方法,求根法。
The extraction technology of carotenoid from arctium lappa l is under study in this paper , and the effects of factors like extraction temperature , extraction times , granularity of burdock dusts , and solid - liquid ratio on the extraction rate of carotenoid are examined through single factor and orthogonal experiment 摘要考察了牛蒡中类胡萝卜素的提取工艺,并通过单因素实验和正交试验研究了提取温度、提取次数、物料粉碎粒度、料液比等因素对类胡萝卜素提取率的影响。