萃取的

N-methylacetamide was used as entrainer in separating acetic acid from water with extractive distillation ,and the interaction mechanism in this process was studied by using the density functional theory.

文献[1-4]认为萃取精馏分离乙酸水溶液过程中萃取剂与乙酸之间的氢键作用改变了溶液中乙酸和水的活度系数关系，从而改变了两者之间的相对挥发度，使得水和乙酸的分离变得相对容易。

The solvent selection and batch extractive distillation with a middle vessel were studied by theoretical analysis and experiment.

本文通过理论分析和实验相结合的方法，主要研究了萃取精馏溶剂的选择以及带有中间储罐塔的间歇萃取精馏过程的操作性能和设计计算问题。

Ingredient and effect: Contains the Alps snowfield glacier Cyanobacteria extract biological activity essence and the Chinese flowering quince extract whitening, Xiong Guogan and so on, the froth is rich, can eliminate the face dirt thoroughly and have the melanin excessive keratinization material, clean at the same time can remove the dissociation in the flesh surface wheat Ranim secretion, promotes the flesh absorption nutrient ability, causes the flesh obviously brightly to pass white.

成分与功效：蕴含阿尔卑斯雪原冰川蓝藻萃取生物活性精华及木瓜萃取美白，，熊果苷等，泡沫丰富，能彻底清除面部污垢及带有黑色素的过量角化物质，清洁的同时更能去除游离在肌肤表面的麦拉宁分泌物，促进肌肤吸收养分的能力，使肌肤更显明亮透白。

Functions: Containing high-tech moisturizing compound of meadowsweet extract, rose water, hyaluronic acid, vitamin E, A and B5, it can deeply penetrate into the skin, supply the skin with large amount of moisture and nutrition all day long, and maintain perfect radiance for the skin inside out in any weather condition.

功效：内含 Meadowsweet Extract 绣线菊萃取、玫瑰萃取液、透明质酸、维生素 E 、 A 、 B5等高科技保湿因子复合体，深入肌肤，能瞬间为肌肤注入大量水分，维持一整天不间断的润泽补给，使肌肤维持理想的润泽平衡，由内而外的滋养感觉，明显有别于仅存于表面的光泽。

For the first time ,AgBr organosol was obtained by using oleic acid to extract and modify the AgBr nanoparticles in hydrosol. And the optimum molar ratio of oleic acid to AgBr nanoparticles was found. AgBr nanoparticles, modified by oleic acid were mixed with MMA. After polymerization was carried out, the polymeric photochromic material was synthesized.

首次采用油酸萃取并包覆了水溶胶中的AgBr纳米粒子，制备了AgBr有机溶胶；并找到了萃取率最佳时的油酸与AgBr的摩尔比；再将油酸包覆的AgBr掺杂到甲基丙烯酸甲酯中，进行本体聚合，从而制备了AgBr光致变色有机玻璃。

Finally,the optimal experimental options could be used to detect the residual sulfonamide in the milk,and get good recovery and reproducibility , therefore ,getting up a quick and simple methode for Solid-pahse extraction technique.

最后将最佳的实验条件应用到侦测牛奶中磺胺剂的浓缩萃取，皆能得到高的回收率与再线性，因此建立一个快速、简单易操作的固相萃取技术。

The experimental results showed that using ionic liquid Et3NHCl-2AlCl3 under the conditions of an extraction temperature of 40℃, an extraction time of 40 min and an agent/oil ratio of 0.02, the sulfur removal rate was more than 90%. The ionic liquids could be used repeatedly for 4 times and the used ionic liquids could be regenerated by vacuum distillation, about 52.34% of the thiophen was recovered during regeneration.

实验结果表明，选用无水AlCl3与Et3NHCl的摩尔比为2.0的离子液体进行萃取脱硫实验，当萃取时间为40 min、温度为40 ℃、剂油体积比为0.02时，脱硫率可达到90%以上；离子液体不仅可以重复使用4次，而且还可以通过减压蒸馏的方法进行再生，在再生过程中可回收约52.34%的噻吩。

Based on experience from production and study of Vanilla Bean Extract over ten years, the process and application of Vanilla Bean Extract in tobacco, food and flavor industries were introduced in this paper, especially the impact factor on quality of Vanilla Bean Extract and identification of adulteration were also included.

摘要本文主要叙述了作者在十多年来香荚兰豆萃取物的生产研究和学习心得，在我国卷烟、食品、香料香精工业中对香荚兰豆萃取物的加工及应用日益增多的今天，具有一定的参考和借鉴作用。

In order to isolate the active compounds in ethyl acetate fraction of Psoralea corylifolia L., activity-guided isolation was performed along with chromatographic techniques. Four active compounds were isolated from ethyl acetate fraction and identified by their NMR spectral data and physical-chemical properties. They are corylin and bavachin, which showed stimulating effect on osteoblastic proliferation and differentiation, isopsoralen and psoralen exhibited activity of promoting cell differentiation in some degree.

为了追踪分离补骨脂乙酸乙酯萃取物中的活性成分，本实验采用多种色谱分离技术，以活性测试为导向，结合波谱技术及理化数据，从补骨脂乙酸乙酯萃取物中分离并鉴定了4个活性化合物的化学结构，它们是具有促进细胞增殖和分化作用的补骨脂异黄酮和补骨脂二氢黄酮，对细胞分化有一定促进作用的异补骨脂素和补骨脂素。

It is an extraction and separation system of potential industrial applications.This dissertation studies on the liquid-liquid equilibrium of water/ ethanol/ isobutanol system in detail, and investigated the partition coefficients for dipotassium glycyrrhizinat in the system.

本文对由水+乙醇+异丁醇组成的水+混合溶剂萃取体系的液液相平衡关系做了较为详细的研究，并探讨了该体系对甘草酸二钾的萃取分配规律。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。