查询词典 catalyzed

Then analyse the enantioselectivity of enzyme-catalyzed reactions to vali- date the approach.

结果实验得到的结果与理论推导计算的结果一致。

The optimal conditions and kinetics of enzyme catalyzed interesterification of Chinese vegetable tallow and methyl stearate without solvents was studied.

研究了无溶剂体系酶促乌桕脂与硬脂酸甲酯转酯化反应的工艺条件及动力学，提出了反应初速度和初始浓度及反应历程中组分浓度和时间关系的两种动力学模型。

Via comprehensive computations, the possibilities of vinylidene and allene intermediates were excluded, and the reaction mechanism was found to contain the following three steps:(1) gold-catalyzed cyclization to give the cyclic intermediate,(2) the cyclic intermediate undergoing a 1,3-H migration to give a more stable intermediate, with the assistance of water-cluster,(3) finially, the 1,2-H or 1,2-silyl migration occuring for generation of the observed product.

通过对各种可能的反应路径的进行计算和比较，排除了亚甲基卡宾和连二烯中间体的可能性，并确定该异构化反应机理包含以下三个步骤：（1）炔丙基吡啶反应在金催化条件下发生分子内的成环得到环状中间体；（2）环状中间体在水分子簇的协助下优先发生1，3-氢迁移反应，异构化得到更为稳定的中间体；（3）最后再进行1，2-氢迁移或是1，2-硅烷基团迁移即得到实验中所观察到的环异构化产物。

Pre-esterification of China wood oil catalyzed by solid acid in fixed bed reactor was researched.

利用固定床反应器，以固体酸为催化剂催化桐油预酯化反应。

A new catalytic kinetic spectrophotometric method for the indirect determination of trace sulfide has been studied. The method was based on the inhibition of sulfide on the iron catalyzed oxidation of xylenol orange by hydrogen peroxide in NH3 medium.

在氨水介质中，硫离子可阻抑Fe催化过氧化氢氧化二甲酚橙褪色，并且催化体系和阻抑体系在570nm处吸光度的差值与硫离子浓度呈线性关系，据此建立了阻抑动力学光度法间接测定痕量硫离子的新方法。

Methods Ascorbic acid was determined by inhibition kinetic spectrophotometric method, which was based on the inhibition effect of ascorbic acid on the nitrite catalyzed oxidation of xylenol orange by potassium bromate in dilute sulfuric acid medium.

在稀硫酸介质中，利用抗坏血酸对亚硝酸根催化溴酸钾氧化二甲酚橙的阻抑作用，用阻抑动力学光度法测定抗坏血酸。

The second is focused on the ytterbium Trifluoromethethanesulfonate catalyzed organic reactions and their applications in organic synthesis.

三氟甲磺酸镱催化的有机反应在有机合成中的应用；3。

In chapter two, firstly, some reactions catalyzed by ytterbium trifluoromethethanesulfonate in recent years were simply outlined.

第二章，首先我们综述了近几年来三氟甲磺酸镱催化的有机反应在有机合成中的应用。

The new reactions induced by low-valenttitanium reagent and the reactions catalyzed by active zinc dust.

共研究了十三个反应，包括八个系列反应。

New reactions induced by low-valent titanium reagent;;dReactions catalyzed by active zinc dust

中文题名低价钛试剂引起的新反应；活性锌粉催化的反应

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。