反应的

This article developed a series of work on the model reactant.

围绕这一模型底物，从溶剂、反应时间以及反应添加物等几个方面对PET环合反应的条件进行了优化，得到了反应的最优化条件。

Some factors, such as the reaction temperature, system pressure, solution acidity, sodium chlorate concentration and the quality ratio of hydrogen peroxide to sodium chlorate on reaction are studied.

研究了反应的温度、真空度、硫酸浓度、氯酸钠浓度、过氧化氢和氯酸钠摩尔比等反应条件对反应影响，得出了实验室制备二氧化氯的最佳反应条件。

The optimum sulfonation conditions were determined based on the study of the amount of sulfonating agent, temperature and reaction time.

探讨了磺化剂用量、反应温度、反应时间、反应介质等因素对产物磺化度的影响，确定了磺化反应的最佳工艺条件。

The N + OH reaction system has no energy barrier in the entrance channel on the PES; instead, there are double wells along the reaction path, which leads to that the integral reaction cross sections are not strongly dependent on either translational energy or initial rotational and vibrational state.

计算还显示，由于N+OH反应入口谷没有能垒，而沿着最小能量反应路径有两个势阱，因此反应的积分截面并不强烈依赖平动能和反应物分子的初始振转态。

At present,the rate laws and reaction mechanisms of pyrite oxidation,pyrite and chalcopyrite formation,uraninite and magnetite dissolution in aqueous solutions are mainly studied,and it is discovered that (1)oxidation rate of pyrite controlled by surface reaction assume fractional dependence on Fe3+ and O2 molalities in acid solutions;(2)Pyrite cannot nucleate directly from solutions below 300 ℃,it can only form initially through sulfidation of a FeS precursor. The rate equation of reaction between FeS and H2S to form pyrite is of the second order;(3)Chalcopyrite is formed by reactions of pyrrhotite or pyrite with Cu2+,the former proceeds via a series of mediate metastable phases of Cu-Fe sulfide,whereas the rate equation of the latter is apparently of the first order which is controlled by surface reaction;(4)The nonlinear behavior of magnetite dissolution at acid pH can be represented by a shrinking core model coupling with surface reaction and diffusion transport.

目前主要研究了水溶液中黄铁矿氧化、黄铁矿和黄铜矿形成、晶质铀矿和磁铁矿溶解的速率定律和反应机理，发现：(1)酸性溶液中黄铁矿的氧化速率对Fe3+和O2浓度呈分数依赖并受表面反应的控制；(2)低于300 ℃时黄铁矿不能从溶液中直接成核，而需初始地通过FeS先驱物的硫化生成，FeS与H2S反应形成黄铁矿的速率方程为二级；(3)磁黄铁矿或黄铁矿与Cu2+反应均可形成黄铜矿，前者经历了一系列准稳的Cu-Fe硫化物的中间物，后者的速率方程为表观一级并受表面反应的控制；(4)酸性pH时磁铁矿的非线性溶解行为可采用表面反应扩散输运耦合的收缩核模型来描述。

The key advantages of the Suzuki cross-coupling are the mild reaction conditions and the commercial availability of the diverse boronic acids that are environmentally safer than the other organometallic reagents.

催化剂是suzuki偶联反应当中一个重要的因素，选择合适的催化剂不仅能够使反应条件变得比较温和而且能够提高反应产率，甚至能使原本不能发生的反应变为可能。Suzuki偶联反应的催化剂通常由两部分组成：钯源和配体。

The effects of different ratio of reacting material, concentration and temperature were studied in the bromination reactions.

研究了溴化反应中反应物物质的量比、反应物浓度、温度付溴代反应的影响。

Cu/ZrO2 catalyst prepared by coprecipitation was used for synthesis of iminodiacetic acid from diethanolamine via dehydrogenation.

用共沉淀法制备的Cu/ZrO2催化剂进行二乙醇胺催化脱氢合成亚氨基二乙酸，分别考察了催化剂用量、原料配比、反应温度、反应压力和反应时间等因素对反应的影响。

Aromatic dinitro compounds were reduced irrespective of the presence or absence of β-CD in sodium hydroxide solution, which revealed particularity of aromatic dinitro compounds.These reactions have advantages below over past research results of aromatic nitro compounds:(1) The synthetic method using water as the reaction medium may

这些反应与过去人们对硝基化合物反应的研究结果相比，具有以下优点：(1)反应在水介质中进行，避免使用辅助有机溶剂和金属催化剂，是环境友好的清洁反应，比较符合绿色化学的发展要求；(2)反应中所用的β-环糊精无毒，价廉，易得

Solid superacids SO~2-_4/TiO_2-Al_2O_3 were prepared and used to catalyze the esterfication of iso-octyl alcohol and by-products in oxidization reaction of durene,which were pretreated before esterifying reaction.

考察了催化剂用量、异辛醇与混合酸的质量比、反应时间等因素对酯化反应的影响，确定了较佳的反应工艺条件：m∶m∶m=0.01∶3.18∶1，反应时间为3 h，在此反应条件下预处理后的混合酸转化率可达到99.9%。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。