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It is reported that added temperature can promote the H atom cleavage from the side-chain alkyl.

在讨论在各种条件对反应的影响中，发现温度对反应有很明显的影响。

We transformed RMgBr into R-Ti derivatives with the production of byproduct MgBrO~(i-Pr at the same time, but we didn\'t need romove the Mg salt by centrifugation or chelating reagents, for bis[2-(N,N-dimethylamino)ethyl] ether could chelate with Mg atom and thereby reduced the Louis acidity of Mg salt, so we used R-Ti derivatives produced in situ to alkylate the aldehydes induced by BINOL-Ti complexes..

我们通过利用TiO~(i-Pr_4使格氏试剂转化成烷基钛，同时产生具有亲核加成促进作用的副产物MgBrO~(i-Pr，由于BDMAEE能与MgBrO~(i--Pr络合降低其路易酸活性，所以不需要离心或者借助络合试剂完全除去镁盐，而使用原位生成的烷基钛在BINOL-Ti诱导下对醛进行不对称加成。

The alkyne group and bromide atom were introduced onto PS end by a series of modification of the functional group.

通过水解位于HPG和PS链之间的酯键测定PS-b-PEO和HPG-g-的分子量和组成。

Upon gaining two electrons the alpha particle becomes a helium atom.

粒子获得两个电子后变成了氧原子。

The particles expelled when the atom explodes are protons, alpha rays or neutrons.

原子爆炸时排出的粒子是质子、a射线或中子。

The results showed that the N atom in amidogen of CTS coordinates with Cd in the coordination compounds of Cd-CTS,while in the coordination com...

结果表明：在壳聚糖-Cd配合物中的配位原子是壳聚糖—NH2上的N原子，而在壳聚糖-Ce、壳聚糖-Zr、壳聚糖-Pb配合物中不仅壳聚糖—NH2上的N原子参与了配位，同时OH上的O原子也参与了配位。

This paper has compared a green chemistry technology of ammonium eerie nitrate with the classical technology by atom economy.

从原子经济性出发，对以碳酸铈为原料合成硝酸铈铵的绿色化学工艺与传统工艺进行了对比。

Then using 3,4,5-trichlorobenzotrifluoride as starting material to prepare 2,6-dichloro-4-trifluoromethylaniline through three routines, The direct ammonolysis method may realize the maximum use of the atom and it meets the modern green chemistry requirement. But the reaction must carry on under the high temperature and high pressure condition, and side reaction had occurred, the conversion was high, but the yield of the product was only 68%.

直接氨解法可以实现原子的最大利用率，符合现代绿色化学原子经济性要求，但是反应需在高温高压条件下进行，且有副反应发生，原料转化率高，但所需产品的收率只有68%。

The mesoporous sieve of the M41S family has framewoks with pore diameters withinthe mesoporous range(2～10nm), huge surfaces areas about 1000cm2/g and amorphism porouswall tent to incorporate hetero atom so that has been used abroad in big moleculer catalysisand separation, life science and environment protection fields and so on.

M41S系列介孔分子筛具有2～10nm左右的规整孔道、大约1000cm~2／g的高比表面积和容易引入杂原子的无定形孔壁等独特优点，被广泛应用在大分子催化、分离和生命科学、环境保护等热点领域。

The nanostructures and mechanical properties of nanocrystalline Ni with average grain size ranging from 2.09nm to 5.23nm were simulated with analytic embedded-atom method and Molecular Dynamics.

摘 要：运用分子动力学技术，结合分析型嵌入原子方法模拟计算了平均晶粒尺寸为2.09~5.23nm的纳米多晶Ni的微观结构和力学性能。

After explaining total design of automated test system for microcircuit , the thesis introduces GPIB standard .

文章在说明了微电路模块自动测试系统的总体设计后，对GPIB标准进行了介绍。

He interceded in my behalf.

他替我说情。