查询词典 chemical reaction

Using the accident mechanism of the risk management system, the essence of the energy transfer gradually, combining that the chemical equation can explain the occurrence of chemical reaction process,Chemical equation can explain the mechanism of a safety management system.

利用事故发生机理——管理系统的危险能量逐级传递的本质，与化学表达式能够准确形象的表达化学反应过程的特性相结合，用化学表达式解释安全管理系统事故的发生机理。

In our research on study chemical reaction of active methylene compounds and brom-acetophenone. Because of brom-acetophenone is compound that contain carbonyl and halogen ,which will take place electrophilic substitution and nucleophilic addition. When active methylene compounds are ethyl acetoacetate and β-diketone, controlling reaction condition, we have found that mono-substitution's production and di-substitution's. production is isolated; active methylene compounds are acetoacetanilide and acetoacetanilide derivate, pyrrolidin-2-one derivants were obtained by substitution and close-ring reaction .but there is no report about it.

本文是让活泼亚甲基类化合物与溴代苯乙酮发生化学反应，由于溴代苯乙酮是含有羰基的卤代烃结构，它可以发生亲电取代和亲核加成反应，当活泼亚甲基类化合物为乙酰乙酸乙酯和β-二酮时，控制反应条件可以发生单取代和双取代两种产物；当活泼亚甲基类化合物为乙酰乙酰芳胺类化合物来反应时，溴代苯乙酮中的羰基与氨基会发生分子内的关环反应生成吡咯烷-2-酮衍生物，这在以前的研究中是没有发现的。

In this paper,we discuss the hydration electron resulted from chemical reaction,and demonstrate the mechanism of reaction about electrotyping oxidation-reduction reaction by the hydrated electron.

本文讨论了在实验室产生水化电子的方法，并用水化电子的概念分析了电解过程氧化还原反应机理。

By improving the chemical reaction between Potassium Iodide and Hydrogen Peroxide, using initial velocity and activation energy calculation, this paper proposes and discusses the reaction mechanism in the reaction.

通过改进碘化钾与过氧化氢的反应实验，用初速度的方法，通过活化能的计算，讨论提出的反应机理，确定反应级数和催化反应与非催化反应的速度常数。

By improving the chemical reaction between Potassium Iodide and Hydrogen Peroxide,using initial velocity and activation energy calculation,this paper proposes and discusses the reaction mechanism in the reaction.

李锦辉，用简单动力学实验证明催化剂在化学反应中的作用

The gas-solid reaction mechanism was studied in the tank reactor. It was found that the reaction rate was controlled by the interdiffusion and intrinsic chemical reaction.

在釜式反应器内研究了氯磺化反应的气固相反应机理，发现气体的内扩散和本征化学反应是氯磺化反应的控制步骤。

A common heating oxidation device(fig.1)is to place a silicon plate in a quartz crystal glass reaction chamber. In the reaction chamber, a electric resistant wire heating device heat up the chamber to a certain temperature(usually, the temperature is 900～1200℃. In a special condition, it can be descended to under 600℃). When oxygen or water vapour pass through the chamber(typical gas flow speed is 1cm/s). A chemical reaction is generated on surface of the silicon plate.

常用的热氧化装置（图1）将硅片置于用石英玻璃制成的反应管中，反应管用电阻丝加热炉加热一定温度(常用的温度为900～1200℃，在特殊条件下可降到600℃以下)，氧气或水汽通过反应管（典型的气流速度为1厘米/秒）时，在硅片表面发生化学反应

Moreover, the kinetics of the esterifieation reaction using ammonium molybdate as catalyst was studied. The result showed that the reaction was chemical reaction controlling. The rate equations were established, and the reaction models gave satisfactory result.

对钼酸铵为催化剂时2，6-NDCA甲酯化反应动力学进行了研究，结果表明，该反应属化学反应控制，根据实验结果，建立了反应的宏观动力学方程式，动力学模型有较好的拟合效果。

The chemical ring expansion is complex and expensive, and causes a significant negative environmental impact. Therefore, an enzymatic reaction is greatly desirable to replace such chemical reaction.

由於这种化学扩环不仅制程复杂，而且会对环境造成相当程度的损害，因此一种利用酵素的生物扩环法取代目前的化学法是被高度期盼的。

The numerical results show that rocket engine plasma assisted combustion can increase active intermediate in chemical reaction,improve chemical reaction speed ,rise burning temperatu.

计算结果表明，火箭发动机等离子体助燃可增加化学反应过程中的活性中间体，提高化学反应速率，提高燃气的燃烧温度，火箭发动机助燃效果非常明显。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。