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Oxidation of methyl tert-butyl ether, a common additive to gasoline,which is one of organic pollutants in the environment, was investigated. Based on the ozonation mechanism of MTBE,the oxidation properties and the intermediates were investigated.

文章针对汽油添加剂甲基叔丁基醚对环境日益严重的污染问题，在臭氧氧化MTBE反应机理研究的基础上，对反应特性及其中间产物进行了研究。

All the resulted products and key intermediates were characterized with EI-MS, 1H-NMR and 13C-NMR. The combined overall yield of these two compounds was up to 52%. The optimized reaction process is mild, easy to manipulate and control.

通过电子轰击质谱、核磁共振氢谱和碳谱对其产物及关键中间体的结构进行表征。2种含有不饱和侧链异噻唑类化合物的总收率达52%，优化后的合成路线条件温和，操作简单，易于控制。

The final products of non-ionic Gemini surfactant can be synthesized by O-alkylating the intermediates with the ethylene oxide.

结果验明，所合成的表面活性剂中间体的结构与设计的结构基本吻合。

It is well known that aromatics are key raw materials and important starting materials for many intermediates and petrochemicals, playing an important role in the modern national economy, benezene, toluene and xylenes in particular.

芳烃是重要的基本有机化工原料，尤其是苯、甲苯和二甲苯，在现代国民经济中有着极其重要的地位和作用。

Replicative intermediates of hepatitis B virus in HepG2 cells that produce infectious virions .

t，曾民德，等。氧化苦参碱抗乙型肝炎病毒的体外实验研究。

O disturbed nickel carbonyl hydride species, monodentate formate species and bidentate formate species are possible intermediates in the methanation of CO〓, the bidentate formate speciea is most stable.

在CO〓加氢反应过程中，可能生成O扰动Ni羰基氢化物、单齿甲酸盐类和双齿甲酸盐类物种，后一物种能量最低。

Among the most potent are the reactie oxygen and nitrogen intermediates. Coelomocytes from inertebrates subsere many of the same functions.

脊椎动物单核的巨噬细胞产生的一系列关于主体防御的分子，其中绝大多数是由活性氧和一氧化氮为中介的。

The degradation of 2, 4-dichiorophoxyacetic acid (2, 4-D) by ozonation combined with sonication (03/US) was investigated. Based on the authors' first paper about the synergistic effect of ozone and US, this paper presents intermediate products of 2, 4-D degradation. The main intermediates were 2, 4-dichiorophenol, benzopuinone, hydroquinone and organic acids, such as maleic acid and oxalic acid and soon.

利用臭氧超声波联合工艺对苯氧羧酸类除草剂2，4-D进行降解研究，在前文探讨臭氧超声波之间协同效应的基础上，确定其中间产物种类主要有2，4-二氯苯酚、苯醌、氢醌以及小分子酸如顺丁烯二酸、草酸、甲酸、乙酸等。

The basic concepts of chiral source , chiral pool, chiral intermediates of pesticides, and the rotes for preparation of chiral molecular compounds from chiral pools were introduced.

介绍手性源、手性池和手性分子化合物的基本概念；由手性池化合物制备手性衍生物；比较了手性化合物生物加工与化学加工过程的优、缺点，寻求高效、经济和最合理的综合工艺流程。

This paper studied the accumulation and release of the eight intermediates in synthesizing pyrethroid insecticides in goldfish and carp muscle.

本文研究了8种与拟除虫菊酯合成有关的化合物在金鱼和鲤鱼肌肉中的积累和释放行为。

After explaining total design of automated test system for microcircuit , the thesis introduces GPIB standard .

文章在说明了微电路模块自动测试系统的总体设计后，对GPIB标准进行了介绍。

He interceded in my behalf.

他替我说情。