反应物

A mass of DMO in the transesterification course inhibited the disproportionation which has a small equilibrium constant. As a result, selectivity and yield of DPO were low.

酯交换反应中由于反应物DMO的大量存在阻碍了平衡常数较小的歧化反应的进行，使得DPO选择性和收率较低。

By means of investigation of parameters (reactant strengths electrobath voltage reaction time reaction temperature membrane stuff material variety and the additive) in the sulfate and sulphuric acid electrolysis process, and compared the electrolysis process through analyzing several important technique factors, found the optimized parameters of peroxysulphate and peroxysulphuric acid electrolysis preparation.

通过对硫酸铵、硫酸电解过程中各工艺参数(反应物浓度、槽电压、反应时间、反应温度、膜材料、阴极室物料种类、添加剂)的考察，并结合对电解过程中重要技术指标的比较分析，确定了电解制备过二硫酸铵以及过二硫酸的较优条件，为工业化电解制备过二硫酸铵以及过二硫酸提供了可靠的基础数据以及工艺参数。

Coking and deactivation of zeolite catalysts in the synthesis of propylene glycol ethyl ether from propylene oxide and ethanol at lower reaction temperature were studied in this thesis.

本文选择反应物与生成物都含有氧原子的自环氧丙烷和乙醇合成丙二醇乙醚作为典型反应，研究较低温度下在沸石催化剂上反应过程中的的积炭失活规律。

Naphthol ethyl ether was sythesized with the ethanol and β-naphthol as materials and aluminium sulfate as catalyst.

介绍了以乙醇和β-萘酚为原料，在硫酸铝Al2(SO43.18H2O催化下合成β-萘乙醚的方法，讨论了反应时间，催化剂用量以及反应物摩尔比对合成的影响，确定了最佳反应条件。

Using the MP2 method at the 6-311G level, the geometries of the reactants, transition state and products of the hydrogen abstraction reaction of isocyanic acid with formyl radical have been optimized. Changes of bond lengths of interacting molecules and the stationary point structures were discussed along the minimum energy paths.

在 UMP2/6-311G计算水平上，优化了标题反应的反应物、过渡态、产物的几何结构，沿最小能量途径讨论了异氰酸和甲酰自由基发生氢转移反应位能面上驻点的结构以及相互作用分子结构变化。

The formation of our 1D nickel wires can be ascribed to the cooperative effect of the reaction rate and magnetic field.The reaction rate in the system is controlled mainly by adjusting the reactant concentration when other reaction conditions are fixed.When the concentration of Ni~(2+) is low,the reaction rate is correspondingly slow,so the complex[Ni(N_2H_4)_x]~(2+) preferentially migrates to the magnetic line of force since paramagnetic metal ions are attracted toward the maximum field.

当反应物Ni~(2+)浓度较低时，反应速率相对较慢，[Ni(N_2H_4)_x]~(2+)优先选择迁移到磁力线附近并且沿着磁力线方向排列，导致电极电势增大，于是[Ni(N_2H_4)_x]~(2+)的化学还原反应也是沿着磁力线发生，结果导致了镍纳米线的形成。

The invention discloses a method for synthesizing acetyl tributyl citrate, which uses tributyl citrate and acetic anhydride as reaction articles, uses naphthalenesulfonic acid methylal as the catalyst during the ester synthesis process, filtering the catalyst from reacted articles after reaction, water-washing, alkaline-washing, distilling the filtrate to obatin acetyl tributyl citrate.

本发明公开了一种合成乙酰柠檬酸三丁酯的方法，它以柠檬酸三丁酯、乙酸酐为反应物，在酯合成过程中用萘磺酸甲缩醛作催化剂，反应结束后，将催化剂从反应后的物料中过滤出来，滤液经水洗、碱洗、蒸馏获得乙酰柠檬酸三丁酯。

The effects of the reactant molar ratio, reaction temperature and reaction time on the products were investigated.

研究了反应物摩尔比、反应温度和反应时间等对产物的影响。

Experimental result makes clear, activator of alumina load potassium carbonate has very good catalysis active.

考察了K2CO3负载量、催化剂用量、反应时间、反应物摩尔配比对反应结果的影响。

In the collision energy range from 0.01 eV to 0.5 eV ,the reaction probability, the influence of rotational excitation of the reagent HBr on probability, the integral cross section and the rotational of the product HF are calculated.

在碰撞能为0.01~0.5 eV的范围内，计算了反应几率、反应物HBr分子的转动激发对反应几率的影响、积分散射截面和产物HF分子的角度分布。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。