化学合成

Polyaspartate can also be obtained through chemical synthesis, but is currently produced only in small quantities. It is more biodegradable than comparable polyacrylates, but not totally biodegradable like the polyaspartate produced in cyanophycin.

聚天冬氨酸也可以通过化学方法合成，但是，目前只能少量生产，其生物降解性比聚丙烯酸酯更好，但不能够像蓝细菌中产生的聚天冬氨酸那样完全被生物降解。

Diatomite is a suitable raw material for the synthesis of zeolites due to its chemical composition.

对于天然矿物的开发利用一直受到广泛的重视，硅藻土因其本身的化学组成，非常适合于作为合成沸石的原料。

The third part of this thesis is reactive simulating calculation In this section, some well-known auxiliaries are selected to compute in density functional theory B3LYP on Gaussian 03, from which the relationship between reaction active energies of transition states and enantiomeric excess of chiral products homoallylic alcohols isobtained based on relative reactive ratio theory. Using this relationship, calculations on the reaction of more than eight auxiliaries with four other aldehydes are carried out in AMI and MNDO, proving that N,N\'-dibenzyl tartamide has higher enantioselectivity than others in this reaction.

第三部分为计算化学部分，运用密度泛函理论B3LYP方法在Gaussian03软件上对已经报道的几种手性配体参与的醛不对称烯丙基化反应过程进行模拟计算，基于相对反应速率理论找出两种构型过渡态间活化能的差异与产物光学收率之间的关系；并以此为基础，用AM1和MNDO方法对上述合成的几种配体控制的反应过程进行量化计算，从而在理论上证实了N-苄基酒石酸二酰胺配体在醛的不对称烯丙基化反应中具有较高的立体选择性。

Much attention has been paid to the synthesis and application of dimethyl carbonate because o...

作为一种低毒性和有多种反应活性的化学试剂，碳酸二甲酯(DimethylCarbonate简称DMC)的合成与应用近年来受到了广泛的重视。

The copolycondensation type polyamic acid was synthesized by using 3,3', 4,4'-Benzophenonetetracarboxylic dianhydride as the dianhydride monomer, 4,4'-Diamino diphenylmethane and 4,4'-Oxydianiline as the diamine monomer under microwave irradiation in Dimethylformamide.

在微波辐射条件下，采用3，3'，4，4'-二苯酮四羧酸二酐、4，4'-二氨基二苯甲烷和4，4'-二氨基二苯醚为单体，N，N'-二甲基甲酰胺为溶剂，低温合成一种共缩聚聚酰亚胺的前驱体聚酰胺酸，化学亚胺化脱水环化生成BTDA型共缩聚聚酰亚胺。

A type of chiral molecular tweezers has been designed and synthesized by using diphenic acid as spacer and chiral unsymmetrically disubstituted urea as arm for the first time.

近年来，利用合成的人工受体与适当底物间的分子识别以建立仿生仿酶模型的研究，已成为生物有机化学和超分子化学前沿领域之一lL】。2 J。

Recently, study on the ISEs with anti-Hofmeister selectivity pattern is an important and interesting subject in the field of electrochemistry and electroanalytical chemistry.

新型传感器材料特别是新型选择性载体的设计、合成和应用不仅是离子选择性电极研究的一个重要方向，而且也是现代化学关注的主要问题。

Application of conductive polyaniline on the electronic related industry has become more and more interesting and popular. In this research, the chemical oxidization method was used to form emeraldine salt type PANi doped with HNO3 and dodecyl benzene sulfonic acid.

导电性聚苯胺(Polyaniline；PANi)应用在电子相关产业是目前相当热门的研究领域，本研究采用化学氧化合成法制备硝酸与十二烷基苯磺酸共掺杂之Emeraldine Salt型聚苯胺。

1The chemical oxidization method was used to prepare emeraldine salt type conductive polyaniline doped with hydrochloric acid by interfacial polymerization which employ immiscible interface formed via the water and organic solvent, and we discuss the influences of synthetic conditions on the conductivity of PANI－HCl.

1采用化学氧化合成法，以界面聚合方式，利用水与有机溶剂所形成的不相容界面，直接制备以盐酸掺杂Emeraldine Salt型导电性聚苯胺，探讨合成条件对PANI－HCl之导电度的影响。

APUHD was prepared with PEPUD acted as emulsor and reactive seeded emulsion in polymerization of acrylate monomer.

利用可聚合自乳化聚氨酯水分散体作为乳化剂和反应性的种子乳液与丙烯酸酯等单体共聚，其优点在于能调节聚氨酯水分散体侧链上参与共聚的双键数目，使聚氨酯和丙烯酸酯两相聚合物体系间直接化学键合增强，相容性提高，增加体系内部交联密度，合成得到具有核壳间互穿网络结构的丙烯酸聚氨酯杂合水分散体。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失