合成的

In this paper,functions of key enzymes in the biosynthesis pathway of shikimic acid were analyzed,and the breeding of engineering bacterium by genetic improvements for high yield of shikimic acid was also discussed.

简述了莽草酸生物合成的途径，着重从基因工程角度分析了莽草酸合成过程中的关键酶及其对莽草酸产量的影响，旨在为研究和开发微生物工程菌生产莽草酸提供参考。

Mesoporous zincum sulfide is synthesized by gentle wet chemosynthesis method, with DDA as templates and Zinc acetate and TAA as precursors. The effect to the synthesis of the ratio of reactive components, the volume of pH, reactive time and reactive temperature has been dicussed systematically, and structures of the as-synthesized samples have been characterized by X-ray diffraction, N2 adsorption-desorption, scanning electron microscopy, Fourier transform-infrared spectra, UV-vis diffuse reflectance spectroscopy, transmission electron microscopy.

以十二胺为模板，醋酸锌及硫代乙酰胺为前驱体，温和湿化学法合成了硫化锌无序介孔结构，系统研究了反应物配比、pH值、反应温度、反应时间对材料合成的影响，运用X射线衍射、N2吸附-脱附、扫描电镜、红外光谱、紫外-可见吸收光谱、透射电镜等分析手段对介孔材料的结构进行了详细的表征。

The uron content was determined and the effects of pH value, temperature, reaction cycle and catalyst species on the Uron content were also discussed by FTIR quantitative analysis by uronizing urea-formaldehyde derivatives at the beginning of the reaction before the synthesis of UF resin.

采用在脲醛树脂合成初期对尿素－甲醛衍生物进行Uron化反应后，再进行UF树脂合成的技术方法，通过FTIR定量分析，研究了不同pH值、反应温度、反应时间及催化剂种类对尿素与甲醛成环化反应的Uron相对值的影响。

This part includes chapter 5, 6, 7, 8, and chapter 9. In chapter 5, we synthesized four Ruthenium chelates, which can be used as ECL reagents. We also investigated their fluorescent properties as well as their electrochemical and ECL properties.

在第5章中，我们合成了四种带有标记基团的钌配合物电化学发光试剂，并对所合成的四种化合物的荧光性质、电化学性质及电化学发光性质等进行了初步探讨。

Based on the research and development of synthesis of halogenated pyridines the paper chose the electrochemical reduction as a research direction, and to 3,4,5,6–tetrachloropicolinic acid, pentachloropyridine, 3,4,5,6-tetrachloro-2-trichloromethylpyridine for raw materials, the reduction behavior on silver and carbon -containing silver electrode was mainly studied.

全卤吡啶脱氯是卤代吡啶类化合物合成的新尝试，本文在国内外卤代吡啶合成研究的基础上，选择了以电化学还原作为研究方向，以3，4，5，6-四氯吡啶甲酸、五氯吡啶、3，4，5，6-四氯-2-三氯甲基吡啶为原料，主要研究了其在银和碳载银电极上的还原行为。

The main challenge of this area currently lies in synthesis speed and the quality of synthesized image.

目前该领域的难点主要体现在纹理合成的速度与合成图像的质量上。

Magnesium monoperoxyphtbalate is composed using benzoic anhydride,magnesium oxide and hydrogen peroxide .

以苯酐、氧化镁和双氧水为原料，研究了均匀设计在单过氧邻苯二甲酸镁合成中的应用，考察了苯酐与氧化镁的摩尔比、反应温度和反应时间对单过氧邻苯二甲酸镁合成的影响，确定了最佳反应条件。

By analyzing national and international literature, a series of cold flow improvers for diesel fuels are synthesized.

研究表明，混合的十六醇和十八醇合成的改进剂降冷滤点效果比单种醇合成的要好。

When the cytotoxic activity of these two types of TNF was compared, the synthesized 26kD TNF was found to exert its effects only in the presence of microsomal membranes.

比较这两种体外表达产物对靶细胞的细胞毒效应，结果表明，只有在微粒体存在时所合成的26kD TNF具有细胞毒活性；而无微粒体存在所合成的裸26kD TNF不显示杀瘤效应。

In both cases, when they grew the cells in the presence of a chemical that infiltrates newly synthesised DNA, they could see that the unlabelled template strands of DNA went into one daughter cell and the new strands went to the other.

他们在培养基中添加能渗入新合成DNA的化学试剂，结果，两种情况下都观察到未标记的模板DNA链进入了一个子细胞，而新合成的DNA链进入了另一个子细胞。

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。