合成

Its levelling ability in wool dyeing indicated that LX was a good levelling agent which can solve the problem of unlevel dyeing of wool effectively.

采用正交试验法、对比试验法，优化了研制匀染剂LX的每一步反应工艺条件，考察了投料比、反应温度、反应时间、催化剂用量等因素对产品质量的影响，得到合成表面活性剂LX的最佳合成条件，并测试了表面张力、润湿性及临界胶束浓度CMC等主要物化性能。

Study on the Synthesis of Uracil Derivatives Ⅱ.Study on the Synthesis of 1, 4-Dihydro-s-Tetrazine Derivatives and Their Antitumor Activity

论文标题：Ⅰ。药物中间体尿嘧啶衍生物合成研究Ⅱ。1，4-二氢-s-四嗪衍生物的合成及抗肿瘤活性研究

The dissertation includes two parts as follows:In the first part, the synthesis of the uracil derivatives : 5-methoxyuracil and 5-methyluracil was investigated, and the reaction conditions were optimized, thus the overall yields were higher than before.

本论文分为两大部分：第一部分：对尿嘧啶类衍生物5-甲氧基尿嘧啶和5-甲基尿嘧啶的合成进行了研究，并分别进行了工艺优化设计，使这两个化合物的合成总收率均比原来提高。

In conditions of the high temperature and high pressure , urea is synthesize with liquid ammonia and carbon dioxide.

摘 要 尿素合成塔是合成尿素的关键设备之一，在较高的压强和温度下，液氨与二氧化碳反应生成尿素。

In leaves,chloroplast not only has photosynthesis,but also is the main synthesis site of essential oil,and essential oil is permeated into small vacuole to store.

在叶中，叶绿体不仅行使光合作用功能，而且还是挥发油的主要合成场所，合成的挥发油以渗透的方式进入小液泡内储存起来。

Methods According to the synthetic situation of vanillin recently, main synthetic process are both narrated and appraised.

根据目前合成状况，对香兰素的主要合成方法进行叙述和评价。

We try to introduce the concept of compositive variable and fittness of land-use and to define the spatial value of land, and in order to find the compositive variable for each grid zone by which the land-use for each grid zone can be specified. We apply the the second family theory of multivariate analysis.

本文导入合成变量与适地度的概念来定义土地的空间价值，以多变量解析中之数量化理论第II类来求出每一方格分区的合成变量，以做为判定各方格小分区内可做为何种土地使用的依据。

In this paper, according to the equation of voltage vector of single-phase motor operating at symmetrical condition, author presents a new voltage-vector PWM method of variable frequency control for single-phase motor. In system, the voltage vector is used as a control parameter.

本文根据单相电动机对称运行时的合成电压矢量方程，提出了以合成电压矢量为控制量的单相电动机电压矢量式PWM变频调速控制方法，并进行了计算机仿真及制作了单相变频器。

The effects of the contents of the acrylate and vinylidene chloride on the contact angle on PET,the extend coefficient on PET and the surface free energy of the emulsion(γ1)were also studied.

通过对乳胶扩展系数、接触角和表面能的测定，研究了合成乳胶有关组份对乳胶粘接效果的影响，从而筛选出合成乳胶的最佳配方。

This introduces several basic manipulative techniques of preparative chemistry and quantitative volumetric analysis including preparation and characterization of a derivative, recrystallization, determination of equivalent weight by using titration and determination of melting points.

这里介绍了几个基本的合成技术和定量分析法，包括衍生物的合成及其结构表徵，再结晶，用滴定法确定等当量和熔点测定。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失