查询词典 reactants

The effect of different reaction conditions,such as catalyst concentration,molar ratio of reactants,reaction temperature,reaction time,on the coupling reaction of trioxane and methyl formate synthesizing methyl glycolate and methyl methoxy acetate using sulfuric acid as catalyst has been studied.Through the analysis for the yield of products and system pressure,and comparison with other different acidity catalysts,we considered that the activation of formaldehyde was the control step of reaction rate to the...

以硫酸为催化剂，研究了三聚甲醛与甲酸甲酯偶联合成乙醇酸甲酯和甲氧基乙酸甲酯的反应中，催化剂浓度、原料配比、反应温度、反应时间等条件对反应过程的影响，通过对产物收率和系统压力变化的分析，并结合与其它不同酸强度催化剂的对比，得到甲醛的活化是偶联反应的速率控制步骤，催化剂的酸强度决定其对甲醛的活化能力，是影响偶联反应的主要因素。

Carbon hollow nanosphers were synthesized at 200oC, using magnesium and hexachloroethane as reactants, aluminum chloride as catalyst and benzene as solvent.

采用格氏试剂法，在温度200℃，反应时间12个小时下，以六氯乙烷为原料，苯为溶剂，铝作还原剂，无水氯化铝为路易斯酸。

The suitable organic imine reactants have a variety of compositions and structures.

合适的有机亚胺反应剂具有多种组成和结构。

Silica, in fact, is a desirable impurity because it is one of the reactants

硅石实际上是一种有用的杂质，因为它是一种反应剂。

Because it is one step from reactants to indole and utilizes inexpensive starting materials, a low cost process on the industrial scale could be possible.

由苯胺和乙二醇一步合成吲哚是众多合成方法中最为经济的一种。

Corresponding reactants, products, intermediates, and interconversion transition states are located on the reaction potential energy profiles.

得到了详细标注反应物、产物、中间体和过渡态的势能面示意图。

The results indicate that CdS nanorods synthesized by soft template method are below 100 nm in diameter and above 3 nm in length, and low irradiative dosage and concentration of reactants can accelerate the formation of CdS nanorods with higher length-to-diameter factor about 30∶1 range.

研究表明，该方法在Cd2+浓度为0.015 mol·L-1、辐照剂量为15～20 kGy时，可获得直径在100 nm以下，长度在3 μm以上的CdS纳米棒；并且较低的辐照剂量和反应物浓度有利于获得较大长径比的CdS纳米棒。

The influences of reaction temperature, reaction time and the ratio of reactants on the formation of lead carbonate crystallites were investigate.

通过实验确定了解制备碳酸铅的最佳工艺条件：反应温度为 95℃，反应时间为 5 h，反应物浓度为0 。5 mol/l，反应物配比为 1∶ 6。

The total mass and number of atom s of all reactants equals those of all products, and energy is almost always consumed or liberated. The speed of reactions varies.

所有反应物的原子总质量和数目等于所有产物的原子总质量和数目，而能量通常几乎被消耗掉或释放，反应的速度各异。

The total mass and number of atoms of all reactants equals those of all products, and energy is almost always consume d or liberated. The speed of reactions varies.

所有反应物的原子总质量和数目等于所有产物的原子总质量和数目，而能量通常几乎被消耗掉或释放，反应的速度各异。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。