合成

Vulcanized fiber may be employed if the bushing is not less than 3/64 inch (1.2 mm) thick, and if it is so formed and secured in place that it will not be affected adversely by conditions of ordinary moisture.

10.2.4.3陶瓷材料和一些模压的合成物可用来做绝缘套管，但木质的套管，热模压虫漆，柏油合成物或者橡胶材料制成的套管不能用。

ABSTRACT Fruit ripening is associated with a number of physiological and biochemical changes including degradation of chlorophyll, carotenoid biosynthesis, synthesis of flavor compounds, conversion of starch to sugars, cell wall solublisation and fruit softening.

果实的发育成熟涉及一系列复杂的生理生化变化，包括叶绿素的降解、类胡萝卜素的合成、淀粉向糖的转化、芳香性化合物的合成、细胞壁溶解和果实软化等。

The primary work in this dissertation:(1) This dissertation compares the differences and similarities between direct digital waveform synthesizer and direct digital frequency synthesizer.

本文的主要工作之处在于：(1)对直接数字波形合成及直接数字频率合成两种数字波形产生方法进行了分析对比。

Based on direct digital synthesizer technology and digital orthogonal upconverter AD9857,an arbitrary waveform synthesizer is realized,which can generate arbitrary waveform in the frequency domain of 6~60MHz.

介绍了一种基于直接数字频率合成技术、采用数字正交上变频器AD9857实现的任意波形合成器，该波形合成器可以在6~60 MHz范围内合成任意波形。

Methoxystilbene and 2-methoxy-4'-nitrostilbene were synthesized from benzyl chloride and nitrobenzyl chloride by the Wittig reaction, and used as intermediates for the synthesis of the final product fluorescent whitener FP4,4'-bis(2-methoxystyrylbiphenyl via reduction and diazotisation of the latter followed by reaction with the former in the presence of NaOH.

以氯化苄和对硝基氯苄为原料，经Wittig反应合成中间体：2-甲氧基-二苯乙烯和2-甲氧基-4'-硝基-二苯乙烯。后者经还原反应、重氮化反应后，在氢氧化钠存在下与前者反应生成最终产品荧光增白剂FP4，4'-双-2-(甲氧基苯乙烯基联苯。为该类荧光增白剂的合成开辟了一条新路线

Many kinds of modern techniques are used to characterize the obtained K_3Na(FeO_4)_2 sample.The preparation of ferrate by the anodic dissolution of an iron wire gauze at an average current density of 4.8 mA·cm~(-2) is described in the third chapter of this paper. The cyclic voltammogram and SEM are used to characterize the iron electrode polarization.

本文第三章研究了一种在浓NaOH溶液中电解铁丝网阳极快速电合成高铁酸钠的技术，用循环伏安和扫描电镜技术对电极的极化过程进行了表征，同时对电合成高铁酸钠的主要工艺参数之间的关系进行了阐述。

The process of synthesizing wood flour polyether was studied further on the basis of previous process, and the synthesis conditions were optimized through both orthogonal experiment and one factor experiment.

在已开发的木粉聚醚合成工艺基础上进行了进一步的研究，通过加入合适反应介质和改变反应条件，将本粉液化率由原来最高的 6 5 %提高到 95 %以上，使所合成木粉聚醚的粘度完全满足了现有聚氨酯生产设备的要

This new method features mild reaction conditions and facile work-up.

3%。结论：该合成方法反应条件温和后处理简单，是一条经济的合成路线。

The reaction proceeded in xylene at 120 ℃ for 10 h to give bromoxynil octanoate in 91% yield.

以DMF、三乙胺为催化剂，在溶剂中，用辛酸直接合成了溴苯腈辛酸酯，实现由酸合成酯的一步反应。

Furthermore, through molecular structural design, we have also synthesized stable dual functional diphenylether polymer intermediates of ABB' types possessing ortho-dicarboxylic at one aromatic ring and diamine groups at another beginning from Xylenol and 1-Chloro-3,4-dinitrobenzene as the raw materials.

中文摘要本研究应用自氧化法与氢化法两反应，成功而有劾地制备出芳香族含酸酐及二胺基之官能基单体，并进一步经由分子结构设计，从3，4-二甲苯酚及1-氯-3，4-二硝基苯为原料，转化合成出安定性高带有羧基与双胺基双官能基之堑新ABB'型二苯醚中间体，并成功地应用此中间体从事自聚合反应，而合成分歧状聚醚亚醯胺高分子。

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