查询词典 activation energy

This adsorption weakens the bonds in t he gas parti cle, so lowering the activation energy of the

这种吸附使气体粒子的键变弱，因此降低了反应的活化能。

The mechanism for synthesizing piperazine has been discussed ,and its macrokinetics model has been founded, the activation energy and reaction velocity constant of piperazine and TEDA has been obtained, the results provided theoretic basis for industrialized production.

对合成哌嗪的机理进行了探讨，并建立了该过程的宏观动力学模型，求出了生成哌嗪和三乙烯二胺的活化能及反应速率常数，为工业化生产提供了理论依据。

Coal tar pitch ; rheological properties ; activation energy ; free volume

煤沥青；流变性能；活化能；自由体积

The critical time of failure was determined according to the discontinuity point of activation energy and dynamic mechanical properties.

但由于分子链极性基团的存在，PA66易发生老化，从而导致材料的性能降低，使其使用安全性和使用寿命受到影响。

The solvent effects were studied with the conductor-like polarizable continuum model respectively in the solvents acetonitrile and water, and we found that the solvent effects reduce the activation energy, but the reduction is small, these reactions are not sensitive to the solvent polarity.

采用导电极化连续介质模型分别研究了在乙腈与水溶液中反应的溶剂化效应，发现这些溶剂可降低反应的活化能，但降低的程度比较小，反应速率变化不大。

The temperature dependence of hydrolysis rate constant was used for the calculation of raffinose hydrolysis activation energy, which matches well with the literature value.

通过测定不同温度下的速率常数可以求得棉子糖水解反应的活化能，所得结果与文献值仅相差0.2％。

The results show that dynamic softening is easy to occur in these ingots and flow stress becomes steady finally; the material constants of hot deformation are procedural parameters that stress-level coefficient α, strain rate sensibility exponent m and deformation activation energy Q are all increased with strain increasing, while stress exponent n is decreased gradually; the values α and m of the alloy homogenized are the biggest and the value n is the smallest, dynamic softening effect of the alloy is the most obvious, which can deform evenly; influence of strain on the value Q of the alloy homogenized is a little and the average value of Q is only 176.5kJ/mol, so the alloy is easy to deform; the alloy matrix shows the regular recrystallization grains when the strain is 50%; dislocation cell structure re-formed in the grains with increase of strain.

结果表明：经不同处理的Al-1Mn-1Mg合金均易发生动态软化并最终呈现稳态流变特征；热变形材料常数是过程量，随应变量的增加，应力水平参数α、应变速率敏感性指数m和热变形激活能 Q 随之增大，而应力指数 n 则逐渐减小；均匀化退火后，铝合金的α和m值最大而n值最小，动态软化效果最明显且变形均匀，在该状态下，铝合金的 Q 值受变形量影响小，平均仅为176.5kJ/mol，易进行热变形；当应变量为0.7时，基体呈现规则的再结晶晶粒组织，随着应变量的增加，晶内重新形成了位错胞结构。

In the literature, the stress exponent n is mostly reliable and with high recurrence rate, the activation energy Q is, in some extent, reiterative, however, the coefficient A is poorly reiterative .

文献中给出的流变参数中，应力指数n的可靠性高，具有良好的重复性，激活能Q在一定范围内具有重复性，而系数A重复性差。

Since aromatic ring is a very stable compound, it would needs very high activation energy to begin the ring opening reaction. It is therefore interesting to investigate how the micro-organism can catalyze this reaction in room temperature at natural buffer condition.

由於芳香环是一种非常稳定的化学结构，如果想要进行开环反应必要要经过极大的活化能，而了解生物体中是如何在常温的环境下进行这样的反应将会是非常有趣的题材。

The enzyme follows typical Michaelis-Menten Kinetics with apparent Km of 3.40mmol/L for Salicin. The activation energy of the enzyme is 50.63KJ/mol.

测定该酶的最适反应温度为43℃，最适反应pH为5.1；在pH5.1，45℃下，该酶催化水杨素水解的Km值为3.40mmol/L，活化能为50.63kJ/mol。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。