extraction n. 1.抽出,拔出。 2.【化學(xué)】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(xué)】開(kāi)方,求根。 spirit of the first extraction 原汁酒。 a man of foreign extraction 外國(guó)(血統(tǒng)的)人。 extractions from a book 一本書(shū)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(xué)】開(kāi)方法,求根法。
The extraction condition of jasmine colorant in water 梔子色素水提取條件初探
Water extraction conditions of polysaccharide from fructus corni 山茱萸多糖提取過(guò)程研究
Study on the optimal extraction conditions of bioavailable hg in soil 土壤中有效態(tài)汞的最佳萃取條件研究
Optimization of extraction conditions for active components in liniaotonglin capsule 正交試驗(yàn)法優(yōu)選銀翹解毒軟膠囊的水煮提取工藝
Studies on optimal extraction conditions of flavonoid from the flowers of edgeworthia chrysantha 結(jié)香花中黃酮類(lèi)化合物提取工藝條件的研究
Abstract : selcting three groups of solvents as extraction menstrual , the best solvent and the best extraction condition are determined 文摘:選用3組溶劑作為萃取劑,利用正交試驗(yàn)確定了萃取蕃茄紅色素的最佳溶劑及條件
Results the extraction conditions were optimized as follows : folium ginkgo and rhizoma chuanxiong were powdered and soaked by fifteenfold - weight 60 % alcohol , to get the highest content of flavone and ligustrazine 結(jié)果:銀杏葉、川芎粉碎成粗粉,用15倍量60 %的乙醇漉條件最佳,總黃酮和川芎嗪的含量最高。
Moreover , some elementary research on bse has been done , the extraction condition was discussed and the results show that bse can solve singular linear mixture problems to some extent . finally an algorithm for multi - sources blind extraction based on information theory was studied 匆此外,本文還對(duì)盲信號(hào)提取( bse )做了初步研究,對(duì)盲信號(hào)提取的條件進(jìn)行了探討,結(jié)果表明bse對(duì)解決奇異線(xiàn)性混合有一定效果,最后基于信息論準(zhǔn)則研究了多源信號(hào)的提取算法。
By using a zone model , simulates the behaviour of smoke temperature , height , volume fraction of co changing with time under different smoke control and extraction conditions in the station and introduces three critical conditions as a criterion for judging the effects of different smoke control and extraction methods 摘要運(yùn)用區(qū)域模型模擬車(chē)站內(nèi)不同防排煙工況下煙氣溫度、高度、 co體積分?jǐn)?shù)隨時(shí)間的變化規(guī)律,以三項(xiàng)危險(xiǎn)臨界條件是否實(shí)現(xiàn)作為衡量防排煙效果的判據(jù)。
In order to study the influence factors of aoa of rose flowers , the effects of drying and extraction methods on the aoa of rose flowers were investigated . the results indicated that drying after high - temperature short - time pretreatment was rather effective to maintain their aoa ; the aoa of water extracts was stronger when the temperature was raised from 25 to 100 ; by using orthogonal test , the optimum extraction conditions of rose flowers were : solvent - 75 % ethanol ; ratio of material and solven - 1 : 10 ; extraction times - three times with 24 h at one time , at the room temperature . the extracts obtained by 75 % ethanol were fractionatedly extracted with petroleum , diethyl ether , ethyl acetate and n - butanol in turn , and the various fractions " aoa were analyzed 為了探討玫瑰花抗氧化活性的影響因子,比較了不同干燥方法、提取方法對(duì)其抗氧化活性的影響,發(fā)現(xiàn):經(jīng)短時(shí)高溫處理后再進(jìn)行干燥有利于較好地保持玫瑰花的抗氧化活性;以水作溶劑提取時(shí), 25 100范圍內(nèi)水提液的抗氧化活性隨著溫度的升高而增強(qiáng);通過(guò)正交實(shí)驗(yàn)篩選得到常溫下玫瑰花抗氧化活性物質(zhì)的最佳提取方法為: 75乙醇為溶劑,液料比1 : 10 ,提取3次,每次24h ; 75乙醇提取物依次用石油醚、乙醚、乙酸乙酯、正丁醇等有機(jī)溶劑進(jìn)行兩相分部萃取,發(fā)現(xiàn)玫瑰花的抗氧化活性物質(zhì)主要存在于乙酸乙酯部,說(shuō)明玫瑰花抗氧化活性主要成分可能是單寧類(lèi)、黃酮苷類(lèi)和原花色素類(lèi)化合物; 4