化学合成

Pore and surface chemical modification technology of zeolite is an important way of second synthesis of molecular sieves.

沸石分子筛孔道和表面化学修饰是对分子筛进行二次合成的重要手段。

Results showed that the chemical structure of the products which are synthesized with the processes provided in this thesis are correct.

结果表明：利用本方法所合成的产品的化学结构与文献所报道的该化合物的结构相符。

It is impossible to think of modern everyday activities without the use of synthetic chemicals called polymers.

这是不可能想到现代日常活动不使用合成化学物质的聚合物。

There are the non-saturated and carbon -carbon double keys and carboxyl group and special functional group derived from carboxyl group, so it is used in the polymerization and co-polymerization widely, can react with many kinds of the compounds, and produce a series of acrylic acid co-polymerization compound .

丙烯酸及其酯的化学结构中均有不饱和碳碳双键和羧基或羧基衍生的特性功能团，因此可广泛用于均聚反应和共聚反应，能与多种化合物反应，合成一系列丙烯酸共聚物。

Chiral SalanCrX complexesa saturated version of SalenCr(ⅢX are designed,and in conjunction with an ionic quaternary ammonium salt or organic strong base can efficiently catalyze the asymmetric,regio-and stereoselective alternating copolymerization of CO_2 with rac-PO at mild conditions to afford isotactic-enriched polycarbonates with～95%head-to-tail linkages and moderate enantioselectivity.

本论文在Salen构型配体的基础上，设计合成了一系列手性Salan型铬配合物，并将其与季铵盐/有机强碱组成亲电-亲核双组分催化体系，在室温下可以有效的催化CO_2和环氧丙烷的不对称交替共聚反应，实现了CO_2和环氧丙烷的不对称交替共聚反应的区域和立体化学控制，得到95%的头尾连接单元和中等光学纯度(对映体过量值ee%≈70%)的全同结构的聚碳酸酯。

The present thesis aimed to explore a low-energy, environmental amiably synthesis route, Chemical Bath Deposition, for depositing metal chalcogenide photoelectric functional thin films, and characterize the structure, morphology and optical properties of obtained thin films.

本文主要探索通过一种低能、环境友好的合成路线一化学浴沉积，制备金属硫族化合物光电功能薄膜，并对所获得的薄膜样品的结构、形貌、光学性质进行表征。

Room-temperature ionic liquids; Synthesize; Spectra; Characterize; Beckmann rearrangement

工程科技I，化学，有机化学离子液体；合成；光谱；表征； Beckmann重排反应

Allogeneic nerve grafts,heterogenous nerve grafts and synthetic materials are all nerve duct that bridge grafting neurologic defeat,in which the chemical extraction heterogenous nerve and the biodegradable nerve graft duct are the ideal materials.

自体神经、同种异体神经和合成材料均可作为桥接神经缺损的神经导管，以化学萃取的同种异体神经及可降解的生物材料导管较为理想。

On the basis of analyzing the chemical composition and mineralogical composition of coal fly ash,a new technological process for producing 4A molecular sieve from coal fly ash has been developed.

在分析粉煤灰的矿物组成和化学成分的基础上，设计了粉煤灰制备4A分子筛预处理过程的工艺流程，并根据流程重点介绍了粉煤灰的粉末细度、焙烧、酸溶活化和除杂等方面的参数选择情况，制备出符合要求的预处理样品，为进一步合成4A分子筛创造了条件。

On the basis of the Zeolite catalyst which is fit to lignin methylolation had been synthesized. Its elemental composition formula is (1～5) M〓: Al〓O〓:(1～10) SiO〓:(0～10) H〓O (M represents an exchangeable cation, n represents the valance of cation), the pore diameter is among 3～13〓.

在此基础上合成出了适合木素羟甲基化反应的沸石催化剂，其化学组成通式为（1～5）M〓∶Al〓O〓∶（1～10）SiO〓∶（0～10）H〓O（M指一种可交换的阳离子，n为阳离子的价数），孔径在3～13〓间。

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