查询词典 synthesis

The synthesis and application of Grignard reagent play a very important role in the teaching of the organic chemistry and organic experiment. The students must hold the experiment on synthesis of Grignard reagent which has been placed on the organic experimental books.

格氏试剂的制备及其应用在有机化学及实验教学中占有非常重要的地位，是学生必须掌握的一类实验，是各类有机化学实验教材中必列的实验内容。

In this paper,the design of hapten synthesis,the synthesis of hapten-protein conjugation,the pre-treatment of sample as well as the application of the immunoassay in residues detection of insecticides,fungicides,herbicides,and growth regulators,were introduced and...

本文简要介绍了农药残留免疫分析方法建立中半抗原合成设计、人工免疫抗原合成、样品前处理等技术的关键环节和免疫分析技术在杀虫剂、杀菌剂、除草剂和生长调节剂等农药残留快速监测中的应用进展，并对农药残留免疫分析技术存在的问题和应用前景进行了讨论。

The effect of heating temperature on the synthesis was investigated and the synthesis process was studied by thermodynamic analysis as well.

考察了加热温度对SiC-Al2O3系复合耐火粉体合成的影响并对合成过程进行了热力学分析。

The synthesis principle of vinylacetate polymer is elaborated and its synthesis method is also discussed. The hest craft conditionis probed and key problem of emulsion polymerization process is pointed out.

阐述了聚醋酸乙烯酯的合成原理及特点，研究了其合成方法，探讨了最佳工艺条件，指出了乳液聚合过程中的关键问题。

Difunctional group reagents, which have metal and heteroatom linked to the olefinic carbon atoms, play an important role in organic synthesis, especially in developing many convenient methods for the stereoselective synthesis of substituted alkenes.

含金属或杂原子的双官能团试剂为取代烯烃的立体选择合成提供了许多方便方法，在有机合成中具有重要作用。

We have studied the transition metal complexes catalyzed sequential cross coupling reactions of these new difunctional group reagents with electrophiles and nucleophiles, respectively; developed some convenient and practical new methods for the stereoselective synthesis of disubstituted alkenes, trisubstituted alkenes, conjugated dienes containing heteroatom, conjugated enyne containing heteroatom etc., enriching methodologies for organic synthesis.

继而研究了这些新型双官能试剂在过渡金属配合物催化下分别与亲电试剂、亲核试剂的顺序交叉偶联反应，为双取代烯烃、三取代烯烃、杂原子取代的共轭二烯烃、杂原子取代的共轭烯炔烃等的立体选择合成提供了方便实用的新方法，丰富了烯烃立体选择合成的方法学。

Hydrogenolysis results show that the activity and selectivity of methanol produced from synthesis gas are smaller than those from pure H2.With increasing reaction temperature,the activity of methanol synthesis increases gradually,with simultaneously speeding up of side reactions.

结果表明，合成气氢解反应活性和甲醇选择性明显低于纯氢氢解反应活性和甲醇选择性，反应温度高对提高催化剂活性有利，但同时也加速了副反应的进行。

An alternative way of the synthesis of methanol from syngas is low-temperature methanol synthesis via methyl formate in liquid phase, namely, carbonylation of methanol in the first step, and hydrogenolysis of methyl formate in the second step.

低温液相甲醇合成是指在（80-160℃）范围内，甲醇首先与合成气中的CO发生羰基化反应生成甲酸甲酯，甲酸甲酯再氢解生成甲醇的两个反应在一个反应器内串联进行的方法。

Development of indene industry and synthesis of indene was introduced in the aspects of separation and synthesis.

概述了国外茚工业的发展现状，重点阐述了茚的分离技术及合成工艺的研究进展。

The scholars pursuing the researches of DES come from the fields of automatic control as well as computer, communication, manufacturing and management science and so on.The research of DES mainly consists of system performance analysis and control synthesis. The present dissertation uses Petri nets as tool to study the controller synthesis of DES with inequality constraint.

制造系统(尤其是柔性制造系统FMS、计算机集成制造系统CIMS)、系统调度、通信网络、交通控制系统、随机服务系统、计算机操作系统、军事上的C_3I系统以及其他一些对现代文明的发展至关重要的系统等都是DES的典型实例。

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