查询词典 condensation

We attached for the first time -NOBIN to Frechet-type dendron units. The syntheses of 16 kinds of dendrimer-based NOBIN Schiff-base ligands were achieved in a straightforward manner by simple condensation of -NOBIN with the corresponding salicylicaldehyde derivatives, of which 12 belong to the dendritic Schiff-base ligands and 4 belong to the non-dendritic Schiff-base ligands.

通过手性拆分获得了光学纯化合物NOBIN，首次将NOBIN手性单元连接到树枝状大分子中去，设计合成了四个系列16种新的NOBIN衍生的希夫碱三齿手性配体，其中4种为非树枝状手性希夫碱配体，12种为树枝状手性希夫碱配体。

When the oxygen content of condensation water is in accordance with the deoxidization demand, the steam source can be removed.

当凝结水的含氧量符合除氧要求时，可以切除汽源。

We possess a complete set of advance equipment for extraction,refinement,column chromatoraphy,condensation and desiccation.

我们拥有一套完整的先进设备进行萃取，精制层析柱浓缩和脱水。

The passing status and progress of hydrogen desiccator based on condensation in recent years is analyzed and compared with each other in detail.

目前，人们已开发研究出基于吸附干燥和冷凝干燥两种原理、形式多样的氢气干燥器。

To avoid condensation, apply only on a dry, clean surface with a temperature above the dew point.

为避免水气凝结，应在干燥清洁而温度又高于露点的表面上施工。

Only by scientific structure of thermal and vapour insulation and well-performed design supervising procedure,could building roof be prevented vapour condensation and dewfall in a special high moisture environment of light-steel structure of textile mill to ensure proper production.

通过实施科学的保温隔汽构造，并建立完善的设计监督程序，在纺织厂房特定的高湿作业环境下杜绝轻钢结构屋面的冷凝结露问题，以保证生产的正常进行。

hydantoin was synthesized from diethyl malonate comprising condensation with 1, 2-dichloroethane, ammonolysis to diamide, Hoffmann degradation to give 5-cyclopropanespirohydantoin, and ring-opening with 40% hydrobromic acid.

以丙二酸二乙酯为原料，先与1， 2-二氯乙烷缩合生成1， 1-环丙烷二羧酸二乙酯，再经氨解生成1， 1-环丙烷二甲酰胺，然后在次氯酸钙溶液中进行Hoffmann降解成环生成5-环丙螺海因，最后在40%氢溴酸中开环得到5-溴乙基海因。

The cis novel bisoxazoline ligands L1-L4 have been synthesized through the treatment of new cis dihydroxy diamide with p-toluenesulfonyl chloride in the presence of catalytic quantity of 4--pyridine, and the cis dihydroxy diamide could be achieved from the condensation of the amino alcohols and cis cyclopropane dicarbonyl chloride prepared via oxidation and halogenation from cis-2,2-dimethyl-3-formylcyclopropanecarboxylate with DCC.

我们以蒈醛酸内酯为起始原料，经过氧化反应、酰氯化反应得到顺式环丙烷二酰氯，然后在二环己基碳二亚胺的催化下与相应的氨基醇反应合成了顺式二羟基酰胺，再用对甲苯磺酰氯将羟基活化，最后在二甲氨基吡啶的催化下关环合成顺式双噁唑啉配体L1～L4。

The invention relates to a synthesis method of aromatic diamine monomers, in which object products are obtained by condensation and reduction.

本发明涉及芳香族二胺类单体的合成方法，通过缩合、还原得到目的产物。

High molecular weight polymer Ⅰ and Ⅱ with decomposition temperature of 560℃ were prepared from condensation of two diamine and terephthaloyl chloride respectively.

两种二胺分别与对苯二甲酰氯进行直接缩聚反应，得到的聚合物分别为缩聚物Ⅰ和Ⅱ，两种缩聚物的热分解温度均超过560℃。

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。