反应速率

This model was finely fitted by theexperimental results and was used to calculate the activation area,which was 0.127 〓/mol with little dependence of subphasetemperature. The positive activation area indicate that there is anincrease in area when the activated complex is formed, increasingthe surface pressure should decrease the rate constant and that theactivated complex is unimolecular in nature.

在一系列实验曲线的基础上，我们提出测量的面积变化应该由聚合中分子结构变化引起的急剧的瞬时面积变化与随后的与此面积变化相反的弛豫过程两部分组成，并据此提出一种反应动力学模型，此模型与实验结果相当吻合，此模型用于处理聚合速率的紫外光强依赖性，得到聚合速率常数近似与光强成二次幂指数关系；此模型也被用于计算活化面积，发现活化面积为〓，几乎与温度无关。

The results showed that the degrdation rate of fluorobenzene by TiO2/SnO2 coating rosed from 71.9% to 90.1% compared with pure TiO2 coating. The apparent rate constant k of the photocatalytic degradation is related to the initial concentration of fluorobenzene and the reaction order is zero. The corresponding degradation rate of aldehyde with the concentration of 100ppm rosed from 69.2% to 91.4% and the reaction order is one.

结果表明：与未改性涂料相比，SnO2改性涂料的活性对氟苯的降解率由71.9％提高到90.1％，反应表观速率常数与降解液初始浓度有关，光催化降解氟苯属于零级反应；对100ppm乙醛的降解率由69.2％提高到91.4％，光催化降解乙醛属于一级反应。

The calculation results show that the SiH insertion reaction into HCl is thermodynamically dominant at low temperature and kinetically favored at higher temp...

该反应在研究的温度范围内是一放热、熵减少的反应，反应的速率常数随温度的升高而增大，而且服从Arrhenius定律。

The relative stabilities and probable proton transfer in isolated and monohydrated 2-hydroxyimidazole molecules have been studied in gas phase using ab initio (MP2/6-31＋G *) method.

采用从头算方法在MP2/6-31＋G*水平上研究了2-羟基咪唑分子在孤立分子和一水合物的异构体的相对稳定性和可能的质子迁移反应，分析了一个水分子的参与对2-羟基咪唑分子异构体的相对稳定性和质子迁移速率的影响，采用Monte Carlo模拟方法研究了反应体系在水溶液中反应的溶剂化效应。

Oxidation veratryl alcohol by LAC/NHA or HBT was 0 degree reaction, but the coefficient of the reaction with NHA is bigger than that with HBT, which means that NHA is more efficient for LMS delignification than HBT.

此外，还比较了NHA和HBT作为介体的LMS体系氧化非酚型木素模型化合物藜芦醇的动力学规律，结果表明藜芦醇的氧化与时间呈直线关系，此氧化反应为0级反应，不过使用NHA和HBT作为介体时，藜芦醇的氧化速度常数有所不同，使用NHA时，藜芦醇氧化的速率常数大，反应速度快。

In this review we provide new application of variational transition state theory -inreaction at gas-solid interface ,with emphasis on dissociation absorption of gas-phase moleculeon the surface of face-centered cubic crystal.

提供了变分过渡态理论的新应用－用于气固界面上的反应，重点是气相分子在面心立方晶体上发生的解离吸附反应，给出了反应的物理图象，用新的势能面计算了H＿2在Ni（100）面上的解离吸附的速率常数，结果与Truhlar的结果相符。

The decolorization reaction appears to be a pseudo first-order reaction and increases with rising temperature.

脱色反应可视为表观一级反应，提高反应温度可以加快脱色速率。

The results indicated that reaction of HCN oxidation to NO finished in milliseconds, and radicals were important reactants or resultants of main elemental reactions during oxidation of HCN. Concentration of radicals had important effect on rate and extent of reaction.

计算结果表明，HCN氧化生成燃料型NO的反应在毫秒级时间内完成，占控制地位的基元反应都涉及到自由基，自由基的浓度决定反应的速率和进行程度。

To judge t he rate control step of intrinsic kinetics of gas-solid catalytic reaction by using Langmuir 's adsorption isothermal line, the judgment of reaction course by using the common models of liquid-solid uncatalyzed reaction .

运用朗哥缪尔吸附等温线判断气固相催化反应本征动力学的速率控制步骤，利用液－固相非催化反应的常用模型确定实际反应过程类型。

A reaction modle was established,in which the surface reaction being the rate determining step and Langmuir–Hinshelwood type mechanism model being the most ideal model for the ethanol dehydration reaction.

动力学研究结果表明，在实验条件范围内，乙醇脱水生成乙烯和乙醚的反应属于平行反应，符合Langmuir-Hinshelwood机理模型，表面反应为速率控制步骤。

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％。