ech

In the test , the toluene content in cyclic ECH was increased step by step .

通过色谱分析，发现回收环氧氯丙烷（ECH）中甲苯含量在逐步升高。

Optimize Reaction Control to Improve ECH Yield

优化反应控制提高环氧氯丙烷收率

A satisfying result was also obtained in the case of post adding ECH .

采用ECH后加法，也得到良好结果。

Research on Synthesis Process and Kinetic Equation of ECH and TMAC in Microemulsion

微乳化条件下ECH和TMAC的合成反应及反应动力学研究

Study on kinetics processes of aliphatic polycarbonate-CO_2 / ECH copolymer by thermal analysis

二氧化碳/环氧氯丙烷共聚物的热降解动力学研究

Fibre improper stone ECH compactification of uniform space X over topology space t

在拓扑空间T上一致空间X的广义Stone－Cech纤维紧致化

ECH ( Echo Canceller Hybrid System ) is used to remove sidetones .

消除侧音采用了回波相消技术。

At the same time , they were influenced and supported by ech other in their spreading .

同时，这两者又在彼此的流传中相互影响，相互支持。

Effect of Microemulsion on the Reaction between ECH and TMAC and Its Kinetics

微乳化对ECH和TMAC反应的影响及动力学

Both Tradition Collusion Hypothesis ( TCH ) and Efficient Structure Hypothesis ( ECH ) are invalid in China fund industry .

传统的有效结构假说和共谋假说对我国的基金业均不成立，而修正的有效结构假说能较好地反映我国基金业的市场绩效与市场结构之间的关系。

This paper introduced the synthesis technics of low molecular weight bisphenol-A epoxy resin using BPA and ECH , and analyzed their advantages and disadvantages .

介绍了用双酚A和环氧氯丙烷制造低分子量环氧树脂的各种合成工艺，并对各种方法的优缺点进行了分析比较。

Thermogravimetric Kinetics of Polystyrene Degradation over BaO Study on kinetics processes of aliphatic polycarbonate-CO_2 / ECH copolymer by thermal analysis

氧化钡催化降解聚苯乙烯的热分析动力学二氧化碳/环氧氯丙烷共聚物的热降解动力学研究

Highly cross linked starch ( CS ) is prepared from maize starch and epichlorohydrin ( ECH ) used as cross linking agent .

以玉米淀粉为原料，以环氧氯丙烷（ECH）作交联剂，合成高交联淀粉（CS）；

The soft rot disease , caused by Ecc , Ech and Eca , is one of the most serious plant diseases throughout the world .

由Ecc，Ech，Eca三种主要病原菌引起的软腐病是世界农业生产上危害很严重的病害之一。

Conclusion CCR , ECH and CCH all account for a rather high percentage in the geometric changes of left ventricle in EH .

结论EH左室几何形态改变，CCR、ECH和CCH均占有较高比例。

The ECH polymers prepared with Al-succinimide-tetrahydrofuran catalyst system are crystalline , while those obtained with the Al-P-PT catalyst system are completely amorphous .

用Al-丁二酰亚胺-四氢呋喃催化体系制得者是结晶型聚合物，用Al-P-PT催化体系制得者是无定形聚合物。

The copolymerization of chloromethylthiirane ( CMT ) with epichlorohydrin ( ECH ) was investigated by using rare earth coordination catalysts for the first time .

研究了稀土配位催化剂对难以开环均聚和共聚的环硫氯丙烷（CMT）与环氧氯丙烷（ECH）的共聚合。

At present , the capacity of epichlorohydrin ( ECH ) in our country is about 110 kt / a , far from sufficient to satisfy the domestic demand .

我国目前环氧氯丙烷的生产能力为110kt/a，不能满足国内的需求。

Synthetic methods of two C3 chiral synthons [ epichlorohydrin ( ECH ) and glycidol ( GLD ) ] was introduced .

简要介绍了两种重要的C3手性合成子&环氧氯丙烷（ECH）和缩水甘油（GLD）的合成方法；

The rare earth coordinated catalytic system was used to catalyze the copolymerization of CO 2 and ECH . Then the aliphatic polycarbonate ECH-CO 2 was synthesized .

利用稀土络合催化体系催化二氧化碳（CO2）和环氧氯丙烷（ECH）共聚反应，合成出新型高分子材料脂肪族聚碳酸酯（ECHCO2）。

A commanding presence in the penalty area and a superb shot-stopper , Petr ? ech has established himself as one the finest goalkeepers in the world .

禁区里的防守指挥家，超级的阻截射门机器，彼特.切赫已经成为了世界上最棒的守门员之一。

The clinical research of the double stapling technique ( PPH and ECH ) in the treatment of serious internal rectal mucosal prolapse with ⅲ - ⅳ degree hemorrhoid ( report of 20 cases )

PPH加ECH治疗严重直肠黏膜内脱垂伴Ⅲ～Ⅳ度痔的临床观察（附20例报告）

Under the catalysis of sodium hydroxide solution , TBA epoxy resin was prepared by stepwise polymerization by use of tetrabromobisphenol A ( TBA ) and epichlorohydrin ( ECH ) .

TBA与环氧氯丙烷（EHC）在氢氧化钠溶液的作用下，通过逐步聚合得到TBA型环氧树脂；

The principle of design , constitution and character of control system in ECH is presented . It introduces the idea that the CENTUM CS constitutes the central control system and realizes the automatical . control of capacity change and the configuration of the application software .

介绍了环氧氯丙烷工程控制系统的设计原则、构成及其特点，提出了利用CentumCS系统构成中央控制系统，实现负荷自动变化控制及其应用软件的组态。

The alumina supported heteropoly-acid catalysts were prepared and used in the polymerization of THF in the presence of epichlorohydrin ( ECH ) to obtained the poly-tetrahydrofuran ( PTHF ) containing ECH moieties .

以氧化铝固载杂多酸（HPA/Al2O3）为催化剂、环氧氯丙烷（ECH）为促进剂催化四氢呋喃（THF）开环聚合，合成了含有ECH结构单元的端羟基聚四氢呋喃（PTHF）。

The soy protein isolate ( SPI ) was modified with epoxy chloropropane ( ECH ), and a biodegradable material was produced . The modification factors and preparation factors that influence the formation characteristics of the biodegradable material from soy protein isolate were studied .

利用环氧氯丙烷对大豆分离蛋白进行改性制备出可生物降解材料，探讨了改性制备因素对大豆分离蛋白可生物降解材料形成特性的影响。

Through copolymerization , various polar groups were introduced onto the main chain of comb-polyethers and improve bi-ion conduction property of their lithium salt complexes obviously in the following order : MAn > AN > AM > ECH . In single-ion conductors .

在作为双离子导体基质的梳形聚醚链结构中引入适量的极性基团，可显著改善其锂盐复合物的离子导电性。含不同极性基的共聚单体提高其电导率的效果为：MAn>AN>AM>ECH。

There are considerable gaps between Jiamusi high-t ech zone and those advanced high-tech zones at home and abroad , in the aspects of eco nomic aggregate , technological innovation and industrialization of achievements , or in the aspects of scale and level of foreign investment .

但是与国内外先进高新区相比，佳木斯高新区无论是从经济总量、科技创新及成果产业化程度，还是从引资的规模和水平来比，都存在着相当大的差距。

Then the molecular imprinted polyethyleneimine on the surface of silica gel was prepared using Cu ~ 2 + as template ions and epichlorohydrin ( ECH ) as crosslinking agent via coordination bond effects , and composite ionic imprinted material IIP-PEI / SiO_2 was obtained .

以Cu2+为模板离子，以环氧氯丙烷为交联剂，通过配位键作用，对化学键合在硅胶表面的PEI大分子链进行了离子印迹，制备了复合型Cu2+印迹材料IIP-PEI/SiO2；

The synthesis of tetrahydrofuran copolymerized GAP binder includes two steps : THF and ECH ( epichlorohydrin ) are copolymerized with the help of catalyst ( BF3 · + diol ) through cation ring opening copolymerization to hydroxyl terminated THF-ECH copolyethers ;

四氢呋喃共聚型GAP粘合剂的合成分两个步骤：a.通过四氢呋喃（THF）和环氧氯丙烷（ECH）在BF3·加二元醇催化下的阳离子开环聚合反应合成端羟基THF－ECH共聚醚；