extraction n. 1.抽出,拔出。 2.【化學】提取(法);萃取(法);回收物,提出物;精煉。 3.精選,摘要。 4.血統(tǒng),家世,出身。 5.【數(shù)學】開方,求根。 spirit of the first extraction 原汁酒。 a man of foreign extraction 外國(血統(tǒng)的)人。 extractions from a book 一本書的內(nèi)容摘錄。 an extraction of 81 percent 百分之八十一的出粉率,八一粉。 the extraction of root 【數(shù)學】開方法,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 摘要考察了牛蒡中類胡蘿卜素的提取工藝,并通過單因素實驗和正交試驗研究了提取溫度、提取次數(shù)、物料粉碎粒度、料液比等因素對類胡蘿卜素提取率的影響。