官能团

The aim of this study was to develop a novel amphiphilic functional block poly(ε-caprolactone) bearing ketone groups MPEG-b-P(OPD-co-CL. 2-oxepane-1, 5-dione was copolymerized with ε-caprolatone in which methoxy poly (MPEG, Mn=5 000) and stannous octoate were used as initiator and catalyst, respectively. The syntheses were conducted by bulk and solution polymerization. 1H NMR results showed that peak position and splitting of the polymers synthesized through solution polymerization were consistent with theoretical data, demonstrating the products were designed block copolymers. While in the bulk polymerization, polymer peak position was changed due to their high reaction temperature, suggesting their structural variation.

将带有羰基官能团的4-羰基己内酯和ε-己内酯分别在甲氧基聚乙二醇(MPEG，Mn=5 000)为引发剂，异辛酸亚锡为催化剂溶液和本体体系中开环聚合，合成了两亲性侧基带有羰基官能团的聚己内酯嵌段共聚物MPEG-b-P(OPD-co-CL.1H NMR结果表明采用溶液聚合法合成的聚合物各峰的峰位置和分裂情况与理论一致，证明了产物是实验所设计的嵌段共聚物，而采用本体聚合法合成的聚合物由于温度的影响，聚合物各峰的峰位置发生了变化，说明其结构发生了变化；差示扫描量热法分析结果表明随着OPD单体含量的增加，聚合物的熔点，玻璃化转变温度和熔融焓增加；热失重测试结果表明OPD单体的引入增加了聚合物的热敏感性。

Chapter one:in this section,a brief introduction of the development of polyfunctional organozinc regents was given,and then reviewed the preparation and reaction of organozinc regent.

在第一章中对官能团化的有机锌试剂的发展做了简要的介绍，然后对主要的就官能团化的有机锌试剂的制备以及在有机合成中的应用选择了一些有应用价值和理论意义的制备方法和反应类型做了详细的综述。

Although itsapplication in organic synthesis has extented rapidly, a survey of literature showsthat CuCN·2LiCl is almost the only copper salt for the Michael addition reaction offunctionalized organozinc halides, and the amount of CuCN·2LiCl used isstoichiometric. Because of the toxity of CN〓, we try to carry out the reaction inother way instead of CuCN.

但在带官能团的有机卤化锌的Michael加成反应中，到目前为止基本上都是使用毒性较大的铜盐CuCN-2LiCl，为了寻找更好的方法，并使其成为催化反应，我们以带官能团的有机碘化锌的Michael加成反应为目标反应，对FG-R-ZnI在有机合成中的应用进行了考察，得到了较好的结果。

By immobilization of denitrifying bacterium on different kinds of carbon fibers, effect of surface oxygenic functional groups of modified carbon fiber on denitrifying bacterium was investigated.

通过对比各种碳纤维表面含氧官能团对反硝化菌的固着化实验，研究了碳纤维表面含氧官能团对反硝化菌固着化的影响。

By means of contrasted immobilization of denitrifying bacterium on several kinds of carbon fibers, the effect of physical and chemical characteristics such as specific surface area, precursor and recycle, especially the surface oxygenic functional group on these carbon fibers was investigated.

通过对比反硝化菌在不同基体碳纤维表面的固着化及碳纤维表面含氧官能团对菌种的固着化实验，研究了碳纤维(基体、比表面积、循环利用性等)特性，尤其表面含氧官能团对反硝化菌固着化的影响。

The results of analysis showed that the DBD was more suitable for oxidizing carbon black than RF. Because carbon black oxidized by DBD had a lot of single oxygenous functional group,carboxyl,which could be used to graft antitumour medicine and could be well dispersed in water.

通过对氧化后炭黑性能的分析测试得出以下结论：DBD 工艺优于RF 工艺，经DBD 氧化改性的纳米炭黑含氧官能团多，官能团单一，在水中的分散稳定性良好，为高选择性地进行药物接枝反应创造了条件。

Terpenoids had business with the life of humanbeings. The last twenty years developments of tricyclic diterpenoids were reviewed.Biologic activities of tricyclic diterpenes which had oxygenous guoups on the 1, 2 or 3 position were reviewed. The important applications and some methods of introducing oxygenous groups on these three positions in recent 20 years were also obtained.

萜类化合物与人类生活密切相关，本文简要介绍了近二十年来三环二萜类化合物的最新研究进展，综述了在C-1、C-2、C-3号位上具有含氧官能团的三环二萜类化合物的生物活性、重要应用，并报道了近二十年来在这三个位置上引入含氧官能团的一些常见方法。

In chapter 4, we have described an improved method for the preparation of ethynylferrocene. Ethynylferrocene was prepared in satisfactory yield by reaction of formylferrocene with triphenylphosphine and carbon tetrachloride followed by dehydrohalogenation in the presence of n-BuLi.

第三章中，我们研究了钯催化下碘杂环化合物的羰基化—酰胺化反应、羰基化—酯化反应和与末端炔烃的羰基化交叉偶联反应，为一步合成多官能团化合物开辟了新的途径，同时，得到的这些产物经过进一步官能团转化后，可以成为一些天然产物合成中的重要中间体化合物。

For example, an objective polyester can be produced in a method of producing an ester comprising, a first step wherein a diol is reacted with an ester produced beforehand from a dibasic acid and a monofunctional alcohol, or an ester produced beforehand from a monofunctional alcohol and diol, a second step wherein unreacted ester is separated from the product produced in the first step to obtain another ester, and a third step wherein unreacted ester separated in the second step is recycled to the first step, 0.05-5 millimoles of the catalyst relative to one mole of acid being used in said first step.

例如，可以应用制备酯的方法制备目的聚酯，包括，第一步，使二醇与产生的酯反应，该酯由二元酸和单官能团醇预先制得，或由单官能团醇和二醇预先制得；第二步，将未反应的酯与第一步所制得的产物分离，得到另一种酯；第三步，将第二步中分离出的未反应的酯循环回到第一步中，在第一步中相对于1摩尔酸来说，应用了0.05-5毫摩尔所述的催化剂。

Like silanes they have four functional groups, but where silanes have only one pendant organic functional Y group, titanates have three, providing more effective coupling to the resin.

象硅烷一样，钛酸酯有四个官能团，但是硅烷只有一个悬挂的有机官能团 Y ，钛酸酯有三个，从而提供与树脂更有效的偶联。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。