查询词典 substitution method

In addition, the amount of heteroatom substitution is another factor that can influence the hydrothermal stability.

本文还开发了另一种新颖的在强酸性体系中合成杂原子分子筛的方法—"pH-adjusting"方法。

Where necessary, nitrogen heteroatom substitution in a six-membered ring was modelled by alteration of the heat of formation by the same amount as benzene to pyridine conversion.

硫磺桥梁在phenanthro[4，5-bcd]thiophene 由转换塑造了从氧气桥梁在4H-cyclopentaphenanthrene 成硫磺桥梁使用区别在丁烷和dimethylthioether 之间。

Understand the basic conceptions on homolysis and heterolysis of covalent bonds, and on the nucleophilic substitution and elimination; Grasp the mechanism and stereochemistry of S N 1 and S N 2 reactions; be capable of judging the stability of carbocations; know the factors that can influence the rates of S N 1 and S N 2 reactions; grasp the elimination reactions of haloalkanes, the mechanism and stereochemistry of E1 and E2 reactions.

了解共价键的均裂和异裂及亲核取代反应的基本概念；掌握 S N 1 和 S N 2 反应机理和立体化学；能够判断正碳离子的稳定性；了解影响 S N 1 和 S N 2 反应速率的因素；掌握卤代烷消除反应， E1 和 E2 反应机理和立体化学。

Objective Explore the important function of functional rehabilitation treatment in the functional recovery after artificial hip joint substitution .

目的探讨功能康复治疗在人工髋关节置换术后功能恢复中所起的重要作用。

In this paper,we first introduce the research background and theory foundation of the project.Then we present a new technique for designing theorem prover which mainly based on transformation and substitution for Pointer Logic,and we have implemented this technique in a tool called APL.As an extension of Hoare logic, Pointer Logic can be used for accurate pointer analysis of pointer programs.

在本文中，我们首先介绍了项目的研究背景和理论基础，然后提出了一种为指针逻辑来设计自动定理证明器的新技术，这项技术主要是基于变换和替代，我们已经在一个被称为APL的工具中实现了该技术。

NQO1 can convert benzene-derived quinones to less toxic hydroquinones. When there is a heterozygosity or homozygosity for the base pair substitution in codon 187 of NQO1, the activity of quinone reductase decreased significantly.

我们还发现位于NQO1基因转录起始点下游第609位碱基发生了C/T的突变，可以导致NQO1蛋白第187位编码脯氨酸的密码子变成编码丝氨酸的密码子。

Results (1)All subjects proved to be homozygote wildtypes for the 478C→T substitution.

结果 (1)所有研究对象均无一例存在FAT/CD36基因启动子区478C→T突变，基因型均表现为478CC之纯合子，478CC和478TT等位基因频率分别为1和0。

The Teukolsky equation is transformed to Heun eqution by variable substitution, and the Heun eqution is a known mathematical function, its solutions is in the form of series of hypergeometric functions.

Hisao Suzuk等通过一系列参量变换转化Teukolsky方程为Heun方程，而Heun方程是已知的数理方程，其解的形式是超几何函数级数。

Bourgeois marriage is in reality a system of wives in common and thus, at the most, what the Communistsmight possibly be reproached with, is that they desire to introduce, in substitution for a hypocritically

资产阶级的婚姻，在实际上，是一种妻子公有的体制，因此，最多，共产党人受到指责的是，他们想推行一个公开的、合法的妇女社区，代替虚伪的、隐蔽的妇女社区。

Timely T4 substitution therapy could strengthen Bcl-2 gene and reduce Bax gene expression and restrained PCD. So it was an important way to correct hypothyroid brain damage.

及时T4替代治疗可以增强Bcl-2并降低Bax基因的表达，有抑制细胞凋亡的作用，是纠正甲减性脑损害的重要方法。

Smoking cigarettes adds to the Computer Desk Computer manufacturer computer mouse Computer Computerized collar knitter machine Conduit Bodies construction board Container Bag Control Arm Cooking Thermometer general levels of air pollution as well as damaging our health.

吸烟不仅对健康有害，而且增加空气污染程度。香烟雾含有多种有害物质：不仅有致癌化学物质、有某种能阻止氧气进入血液的气体，还有引起血压增高、心速加快的被称为尼古丁的物质。

He is one of my favorite actors.

他是我最喜欢的男演员之一。