反应率

The results indicated that new Lewis acid ferric potassium alum was a green catalyst for the synthesis of ethyl lactate.

研究了新型Lewis酸铁钾矾的制备，并以该Lewis酸为催化剂，通过乳酸和乙醇反应合成乳酸乙酯，考察了催化剂用量、反应时间、酸醇物质的量比对酯化率的影响。

The positive seroconversion rates of neutralizing antibody were 100%(n=27 GMT 2.89 IU/ml) and 100%(n=30, GMT 5.29 IU/ml) respectively by pre-exposure and post-exposure schedules.

结果 全部受试者仅显示12%的轻度副反应，无中强度副反应；不管以暴露前或暴露后方案接种，全程注射后的中和抗体阳转率均为100%。

In the dynamic experiment of wet air oxidation of phenol with pelletized Ru/ZrO2-CeO2, phenol and COD reduction was maintained at 96% during 110 h of reaction. The concentration of the main intermediates was small. In the experiment of catalytic wet air oxidation of phenol, the leaching concentration of active species was small. There were small amounts of carbonaceous deposits on the surface of the used catalysts, and the carbonaceous deposits can be completely oxidized at 300℃.

在110h的催化湿式氧化苯酚反应中，苯酚和COD的去除率维持在96%左右，反应过程中活性组分的溶出浓度很小，催化剂表面有少量的积炭，但积炭在300℃能够被完全氧化。

Firstly, phenyliodine diacetate was immobilized to the 2% cross-linked polystyrene or the liner polystyrene resin. The more iodine the resin had, the lower conversion to phenyliodine diacetate. We made our endeavor to extend the range of useful application of polystyrene supported phenyliodine diacetate in organic synthesis:(1) the reagent was used as an effective reagent of carbonyl regeneration from oximes and semicarbazones of ketones.(2) the reagent was also applied to the synthesis of 1, 3, 4-oxadiazoles, 1, 3-disubstituted-2-pyrazoline, 2-arylbenzoxazole from aldehyde N-acylhydrazones, aldehyde hydoazones and phenolic Schiff's bases respectively.

首先，我们以2％交联的聚苯乙烯和线性的聚苯乙烯树脂为载体，制备了聚合物负载的二醋酸碘苯，通过研究发现：(1)聚苯乙烯二醋酸碘苯是酮肟、缩氨脲有效的去保护试剂，不仅芳香酮，脂肪酮和α，β不饱和酮的肟、缩氨脲也能顺利转化为相应的酮，实现酮基的再生；(2)我们还利用此试剂，分别与醛的N-酰基苯、N-酰基苯腙及邻羟基芳亚胺反应，在温和的条件下发生成环反应，以良好的产率生成1，3，4-噁二唑、吡唑啉和二取代苯并噁唑等杂环化合物；(3)聚苯乙烯二醋酸碘苯还可有效地将邻羟基芳酮的酰腙经氧化、重排成1，2-二酰基苯。

Tetraallylsilane was synthesized by one-step approach through the reaction of silicon tetrachloride with the partially solvated Grignard reagents formed in situ from allyl bromide and magnesium in the mixed solvents of toluene and ether.

采用一步合成方式，将3-溴丙烯与金属镁在以甲苯和供电子溶剂构成的混合溶剂中进行反应，继而与四氯化硅反应，成功合成了四烯丙基硅烷，其产率在乙醚与3-溴丙烯的摩尔比为4(V甲苯/V乙醚=1·1)时达到极值，超过了91%。

In the present dissertation, a surfactant-templated mesoporous silica molecular sieve with high pore volume, high porosity and narrow bimodal mesopore size distribution was synthesized for the first time in a reaction system, which was used usually in the synthesis of mesoporous MCM-41 molecular sieves, by a judiciously controlled two-phase sol-gel processing under basic conditions.

在本论文中，我们通过对一个通常用于制备介孔MCM-41分子筛的反应体系中正硅酸乙酯水解与缩合反应相对速率的精确调控，首次在弱碱性体系中合成了一种具有高孔隙率、大孔体积和双介孔孔分布特征的新型二氧化硅分子筛材料，简记为BMS，并对BMS二氧化硅分子筛中双介孔结构形成的原因及各种可能对其结构和性质产生影响的合成因素如Ammonia／silica摩尔比、组分浓度的变化、表面活性剂烷基链长度的调节、辅助有机物均三甲苯的引入、催化剂的结构和性质、溶剂和助溶剂的极性和用量、老化和干燥条件的变化及合成后水热处理等，利用不同的测试手段如XRD，SEM，TEM，〓Si MAS NMR，TG-DTA，N〓吸附测试等进行了系统的表征研究。

In the process of converter smelting, a fair quantity of iron oxide ball with high grade, low moiwture content and low in purity is added to converter instead of ore as the adjusting agent of temperature and slag.

在转炉冶炼过程中向炉内试验加入一定量的含铁品位高、水分少、杂质低的氧化铁球来代替矿石，作为转炉调温调渣剂，结果表明，加入氧化铁球后，转炉反应平稳，调渣迅速，不会产生剧烈反应造成喷溅，并有利于提高金属收得率。

In optimum conditions of the samples obtainedby vacuum distillation, extraction, drying measured response rates of 80%.

在最佳反应条件下制得的样品通过减压蒸馏、萃取、干燥后测得的反应转率在80％以上。

Hydrolysate of epichlorohydrin in alkali aqueous solution was studied, mole ratio of epichlorohydrin to water, temperature and time were investigated in detail, the mechanism was discussed in this paper.

研究了环氧氯丙烷在碱性水溶液中的水解产物，考察了原料摩尔配比、反应温度和反应时间等对水解率的影响，讨论了其水解机理。

The effects of molar ratio of anhydrous ethanol to glacial acetic acid, dosage of catalyst, reaction temperature and reaction time on the esterification ratio and reuse of catalyst were discussed.

探讨了酸醇物质的量的比，催化剂的用量，反应时间和反应温度对酯化率的影响及催化剂的重复使用情况。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！