查询词典 reaction rate

When the hydrogenation was performed with ultrasonic irradiation, the reaction rate could be greatly enhanced while the selectivity to cinnamyl alcohol remained almost unchanged.

在加氢过程中使用超声辐射能大大提高反应速率而肉桂醇的选择性几乎保持不变。

The thermal decomposition yielded unsaturated compound and dithiobenzoic acid, leading to some loss of living character of the polymerization, such as retarded reaction rate and broadened molecular weight distribution.

我们根据合成双硫酯的经验和实验中的观察发现，双硫酯的热稳定性对RAFT聚合影响很大，在较高的温度下双硫酯会发生一定程度的热分解，生成的双硫酸会对聚合有一定的阻聚和延迟作用。

And then, the second-order reaction rate constant was K =0.025 L/. The removal of ethanethiol in raw water by potassium permanganate under coagulation condition was poorer than in pure water condition, So predicted concentration of potassium permanganate was lower than real concentration.

高锰酸钾在原水混凝条件下对乙硫醇的去除效果劣于纯水条件下的去除效果，在水中其它有机物与高锰酸钾反应条件下高锰酸钾浓度变化的拟合结果与实际情况存在偏差，是产生差异的主要原因。

The forward and backward reaction rate constants of ferulic acid conversion at 23℃ were found to be 5.194×10^(-6)s^(-1) and 5.360×10^(-6)s^(-1), respectively.

在23℃，阿魏酸转化反应正向和逆向反应速率常数分别为5.194×10^(-6) s^(-1)、5.360×10^(-6)s^(-1)。

By studying and summing up the common failure physical models and combining with the quantum mechanics theory on the relationship between the electronic equipment aging reaction rate and tempreture-humidity,a hygrothermal aging life model for solid propellant storage and usage is established with the propellant mechanical properties as the research object.

通过对常用失效物理模型的分析和总结，结合量子力学理论关于电子产品老化反应速率与环境温、湿度的关系，以推进剂力学性能参数为研究对象，建立了固体推进剂贮存使用寿命的湿热老化模型，并通过试验数据拟合得到具体的经验公式。

In the reactions of IC with wood, the reaction rate significantly influenced by the tridimentional inerratic structure of cellulose, while wooden hydroxy has less effect.

在木材与异氰酸酯反应过程中，纤维素的立体规整性结构对于反应进行的快慢起主要作用，羟基的作用则相对较弱。

The prediction of reaction rate of volatile basic nitrogen and the maximum allowable duration of shrimp at ambient temperature were kinetically analyzed.

将红虾置29℃、25℃、21℃、14℃及5℃贮藏，探讨其鲜度变化，结果显示挥发性盐基态氮和鲜度变化有一致相关，作为鲜度变化指标。

The catalysts of the invention is able to catalyse metathetic degradation of nitrile rubbers with a higher activity than the metathesis catalysts available at present and thus makes possible an increase in the reaction rate and the setting of lower molecular weights of the degraded nitrile rubbers at a comparable noble metal content.

本发明的催化剂能够以比目前可获得的复分解催化剂更高的活性来催化丁腈橡胶的复分解降解，由此在可比较的贵金属含量下使之有可能增加反应速率并设定降解的丁腈橡胶的较低分子量。

The reaction rate of the reactants milled at high temperature was higher than that of milled at room temperature.

但由于反应在高温进行，球磨活化作用有失去的趋势，球磨对反应的促进作用就会减弱乃至消失。

The reaction rate constants of Pb〓 with pheophytin a, pheophytin b and hydroxypheophytin a were 2. 0 mol〓 l s〓, 0.78mol〓 l s〓and 1. 86 mol〓 l s〓, respectively.

铅与叶绿素a直接进行反应的结果显示：铅并不能取代叶绿素中的镁生成铅叶绿素。

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％。