查询词典 reaction rate

The thermodynamics of TNR solution was studied by analyzing heat-flux to time curves,the rate constant of reaction and the reaction order were determined to be 1.632×10-3 s-1 and 0.6158,respectively.

同时，对TNR溶液反应的动力学进行了研究，通过分析热流对时间的曲线图，确定了该溶解反应的速率常数为1.632×10-3s-1，反应级数为0.6158。

The fact that the amount of CO2 and the concentration of residue varied with reaction time indicates that it is a reaction of zero order and the degradation rate of PEG is negatively proportional to the average molecular weight of PEG.

生成物CO2的量及剩余反应物浓度随时间变化的结果表明，反应为零级反应，且催化反应速率与PEG平均分子量成反比。

For double jet method, effects of used solvent, shape of stirrer, adding reactant position, reaction temperature, excessive silver ion concentration in reaction solution and adding rate on the nucleus formation, and growth of silver behenate crystal were systematically studied.

本文分别采用单注沉淀法和双注沉淀法制备了山嵛酸银晶体，通过对两种制备方法的对比及优选，最后确定双注沉淀法更适合制备细粒径的山嵛酸银，通过采用SEM、TEM等对山嵛酸银晶体形貌的表征发现，制备山嵛酸银所使用的溶剂、搅拌方式、加料的位置、反应温度、反应初始液中银离子浓度及加料速度等，均对山嵛酸银的晶体成核与生长有一定的影响。

The proper hydrolysis reaction temperature of benzal chloride was 1000C and the initial quality rate of water phase and organic phase was 2∶1,reaction time was 3 hours.

苄叉二氯的水解方法已经有很多报道[1，2]，主要的方法有酸性水解法、碱性水解法、酸碱联合水解法和催化水解法。

Experimental results indicates there is high conversional rate in short reaction time and high temperature of coal liquefaction .the coal conversion increases along with the extension of reaction time , exceeding the final temperature of coal liquefaction, the coal conversion declines .

在煤液化反应的起始温度Tb时，煤转化率随时间的延长而增加，高于液化反应的终止温度Tf时，煤转化率下降。

On the other hand, in catalytic oxidation the cyclohexyl hydroperoxide decomposed rather quickly, and then accelerated the reaction.And during the reaction, the concentration of cyclohexyl hydroperoxide kept very low and the chain propagation became the rate limiting step.

而在催化剂存在的情况下，环己基过氧化氢分解非常迅速，环己基过氧化氢浓度在整个反应过程中稳定在一个很低的水平，反应由氧化生成酮的链传递反应过程控制。

The results showed that the chitosan had the viscosity of 2886.7 mpa · s and the deacetylate rate up to 97.17% under the optimal reaction condition: temperature 50℃, 3 h reaction period, and 50% NaOH.

结果表明，用超声波制备高黏度壳聚糖的最佳反应条件是：反应温度为50℃，反应时间为3h，NaOH溶液的浓度为50％，可以得到黏度为2886.7mpa·s、脱乙酰度达97.17％的壳聚糖。

Solvent effect on the Diels-Alder reaction was analyzed with four different kinds of solvents: benzyl alcohol, cyclohexanone, toluent and decalin. The results show that the rate of the Diels-Alder reaction increased in more polar solvents and stereoselectivity of TCPD decreased.

在模拟计算基础之上，选择苯甲醇、环己酮、甲苯及十氢萘四种溶剂进行Diels-Alder反应的溶剂效应研究，考察温度、压力变化对反应速度、产物立体选择性的影响。

Compared with acute-phase reaction and erythrocytic immune function, neutrophilic counts, interleukin-6, natural killer cells, C-reaction protein between gasless hand-assisted laparoscopic surgery and carbon dioxide pneumoperitoneum laparoscopic surgery, we found there were obvious difference on N/L rate, CRP, IL-6, Which provided evidence for evaluate the gasless hand-assisted laparoscopic technique superiority to the traditional surgery, and treatment for clinical immune modulation.

通过非气腹手助腹腔镜、CO2气腹腹腔镜和开腹手术创伤后出现的急性期反应和红细胞免疫功能的检测，中性粒细胞计数、IL-6，NK，CRP浓度等APR指标检测，发现非气腹手助腹腔镜结直肠癌手术术后中性粒细胞／淋巴细胞、CRP、IL-6等免疫指标的变化情况较腹腔镜组、开腹组有明显区别，为评价此手术技术是否较传统方法优越和临床免疫调节治疗提供依据。

The influences of the reaction time,the reaction temperature,the mole ratio of isovaleric acid to isoamyl alcohol,the quantity of solid surperacid catalysts on the conversion rate of iaovaleric acid were studied.

介绍了一种利用超强酸TiO2/SO2－4催化合成异戊酸异戊酯的新工艺，研究了固体超强酸催化剂用量、酸醇摩尔比、反应时间和反应温度对异戊酸转化率的影响。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。