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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）。

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

消除侧音采用了回波相消技术.

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In English, complex sentences are a number of spe ech language phenomena.

在英语中, 复合句是大量出现的语言现象,从句种类之多,表达形式各具特点.

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The level of INS was also elevated , being the highest in the ECH subgroup.

ECH组血浆 INS 水平最高.

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Optimize Reaction Control to Improve ECH Yield

优化反应控制提高环氧氯丙烷收率

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Ecc growsmost rapidly at 26℃, Eca at 21℃, while growth of Ech was similar in 3 temperatures.

Ecc在26℃生长最好, Eca为21℃, Ech在三种温度下的生长量差别不大.

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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；

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Some biochemical characteristics and antigenicity of the polypeptides of two antigenic prepared products of Cysticerci cellulosae were analysed step by step with EITB ech-nique.

以EITB技术逐一分析了猪囊尾蚴两种抗原制备物中各多肽的一些生化特性和抗原性。

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The applications of ECH in drug synthesis and GLD in some organic synthesis were reviewed.

综述了ECH在药物合成以及GLD在部分有机合成中的应用.

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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；

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THF copolymerized GAP is synthesised by the azidation of hydroxyl THF-ECH copoyethers.

b.端羟基THF - ECH共聚醚叠氮化生成THF共聚 型GAP粘合剂.

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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.

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Under the same conditions, propylene oxide polymerization proceeded fasfer than ECH polymerization.

在同样的聚合反应条件下, 环氧氯丙烷聚合反应速度大于环氧丙烷聚合反应速度.

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As a standard resin in China, E type epoxy resin is condensed by BPA and ECH.

E系列环氧树脂为国内通用型树脂, 由BPA与ECH(环氧氯丙烷)缩合生成.

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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.

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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；

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