乙酸

The results showed that azeotrope didn′t appear and the thermodynamic consistency of the experimental data was examined by the Herrington area method.

分别采用Wilson方程和NRTL方程对实验数据进行了关联，计算结果与实验数据均较为吻合，其中NRTL模型的关联结果较好，乙酸异丙烯酯汽相摩尔分数的最大偏差为0.0036，平均偏差为0.0010。

In the end, the extractive distillation method was applied to separate and purify the binary azeotrope mixture, methanol-dimethyl carbonate. The isoamyl acetate was used as extractant and the two tower system was introduced to continuous extractive distillation operation. The results show a better separation effect.

最后采用萃取精馏的方法，对甲醇-碳酸二甲酯的二元共沸混合物进行了分离提纯研究，以毒性较低的乙酸异戊酯为萃取剂，采用两塔连续萃取精馏操作，结果表明，分离效果比较理想。

It has also been proved that azotobacter CN-2 has a property of secreting hormone material similar to IAA.

固氮菌CN-2还具有分泌吲哚乙酸类植物激素的功能。

Aim To study the chemical constituents from the broth of marine bacterium Bacillus sp.

发酵液的乙酸乙酯萃取物进行化学成分的研究。

Boron- and Silicone-Containing Phenolic Resin was synthesized by using barium hydroxide and zinc acetate composite catalyst. The structure of BSPR was characterized by FT-IR.

采用氢氧化钡和乙酸锌为催化剂合成了含硼和硅的酚醛树脂 BSP，用 FT- IR对其结构进行了分析，用 TGA和氧指数仪对树脂的耐热性和阻燃性进行了测试。

Carboxymethyl Chitosan was synthesized under conditions of basification and heat by chitosan and monochloroacetic acid.

以壳聚糖与一氯乙酸在碱性条件下通过加热制备了羧甲基壳聚糖。

The gas chromatography and gel permeation chromatography methods for determining the residues of 2,4-dichlorophenoxyacetic in bean sprout was developed.

建立了豆芽中2，4-二氯苯氧乙酸残留量的凝胶渗透色谱净化——毛细管柱气相色谱测定的方法。

Through to extract and separate fir benzine extracturm,it is receive bornyl acetate , initially study the separation craft technologies.

通过对巴山冷杉石油醚浸膏的提取分离得到了乙酸龙脑酯，初步探索了其提取分离工艺。

In the precence of the base catalyst KF/Al2O3, the one - pot reaction of 2 -hydroxybenzaldehyde or 2 - hydroxynaphthaldehyde with ethyl α- bromoacetate,α-bromoacetophenone , 1,4 - dichloromethylbenzene , 4,4'- dichloromethylbiphenyl and 1,5 -dichloromethylnaphthalene gave the benzofuran compounds in 38-89% yield.

本文报道用 KF/Al_2O_3作为碱催化剂，由水杨醛或2-羟基-1-萘醛分别和α-溴代乙酸酯、α-溴代苯乙酮、苄基氯、4，4'-二氯甲基联苯和1，5-二氯甲基萘等进行一锅化缩合反应，以38～89％的产率合成了14种芳并呋喃化合物。

We provide intermediates of Methylphenidate HCl: 2-Phenyl-2-(2-Piperidyl) Acetamide; 2-Phenyl-2-(2-Piperidyl) Acetic Acid; Series of Benzoic Acid、Benzonitrile; Other pharmaceutical intermediates.

提供盐酸利他林中间体：2-苯基-2-(2-哌啶基)乙酰胺；2-苯基-2-(2-哌啶基)乙酸；苯甲酸、苯甲腈系列及其他医药中间体。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新