氢化

In the forth part, in the presence of chiral phosphoric acid, highly enantio-enriched (up to 98% ee)α-aryl glycine derivatives could be synthesized via asymmetric transfer hydrogenation of the α-aryl imino esters using Hantzsch ester as the hydrogen source.

第四部分工作中，利用Hantzsch酯作为氢源，高对映选择性地实现了手性磷酸催化芳基酮酸酯亚胺的不对称仿生氢化反应，以最高98％的对映选择性得到苯甘氨酸衍生物。

The best catalytic activity and selectivity could be found in the prepared catalyst system with the optimum combination of the ionic liquid, nano-Pd, and support. The stabilizer is also used to prevent the aggregation of nano-Pd particles. One of the advantages of this approach is that the prereduction of catalyst is not required.

其中离子液体、奈米钯金属及担体皆有其功能，三者之组合才能达到良好之效果，同时，在合成奈米钯过程中，必须使用稳定剂以避免奈米钯金属之聚集此触媒系统之另一优点为不需先加氢还原处理，耐水性强且可重覆使用，是一种颇具潜力之选择性氢化触媒。

It is observed by in situ stain that LDH(1-5)… nNAD+ can probabl y enter the nucleopore and bind specifically with the gene that encodes itself.

摘 要：原位染色发现，LDH(1-5)…nNAD+(LDH：乳酸脱氢酶，NAD+：氢化型辅酶I)可以进入核孔，可能与自己编码基因特异结合。

Hydrogenated terpinene maleic anhydride was prepared by catalytic hydrogenation of terpinene maleic anhydride in the presence of Pd/C catalyst.

研究了反应温度，压力，催化剂用量等因素对萜烯马来酸酐催化加氢制备氢化萜烯马来酸酐合成工艺的影响。

Based on the analysis of the Jahn-Teller effect,vibronic interaction and the resolution of group representations, the possiblegcometrical configurations of 〓 have been derived for the first time, the results arein good agreement with the calculation esults.Firstly, the reasonable dissociative limits for the diatomic molecules of ZrCo,ZrH, CoH, UH,〓 and AlNi have been derived based on the Atomic and MolecularReactive Statics and the resolution of group representations. The groundelectronic states, which are 〓,〓,〓 and 〓 respectively for thesemolecules, have also been optimized based on the RECP method.

本文根据相对论有效原子实势和密度泛函理论方法(B3LYP／SDD与B3LYP／6-311G〓)，用Gaussian-98W程序研究了ZrCo、ZrH、CoH、UH、〓、AlNi、〓、HZrCo和〓分子的分子结构、分析势能函数、微观力学性质和光谱性质；首次建立了计算固体金属氢化物体系宏观性质理论模型，并应用于ZrCo、Zr和Co的氢化反应体系研究，理论计算与实验结果基本一致；基于Monte-Carlo准经典轨线方法，首次研究了H与ZrCo和Co与HZr的分子反应动力学。

The hydrogenating treatment can enhance the mechanical properties of Mg-Li-Zn-Y-Zr-LPC alloys in evidence.

氢化过程中，氢会与Mg-Li-Zn-Y-Zr-LPC合金中稀土反应生成黑色小颗粒状化合物。

Making use of the principal advantages of reaction technology in the hydrogenation of plastics, we have, as a specific objective, aimed in our work at a reduction of the reaction parameters such as pressure, temperature, hydrogen consumption, and catalyst application with simultaneous quantitative breakdown of hydrocarbons, containing heteroatoms, to saturated paraffins and plastic monomers as a desired result.

在塑料氢化中充分发挥反应技术的主要特点，我们针对某一特定的目标，在我们的工作减少等压力、温度、耗氢量和催化剂等参数，并同时应用包含杂原子的碳氢化合物的定量分解成饱和烷烃和塑料单体，作为我们期望看到的结果。

This paper introduces the method of preparing high-purity magnesium hydroxide by double decomposition method with industrial magnesium chloride and barium hydrosulfide as the raws materials.

以工业氯化镁和硫氢化钡为原料，采用复分解法合成高纯氢氧化镁。

It is found that hydrogen incorporation influences the relative luminescence intensities of bound excitons, and, in particular, the intensity of I4 (3.363eV)is enhanced.

研究发现氢的引入影响了束缚激子的相对发光强度，特别是氢化以后I4峰(3.363eV)的强度增加。

A multi-metal alloy catalyst for hydrogenation of acetonitrile to ethylamine was prepared using hydrazine hydrate and potassium borohydride as the co-reductant.

以水合肼和硼氢化钾为共还原剂制备了多元合金催化剂，将其用于乙腈催化加氢反应制乙胺。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。