硝化了的

In this paper,3-methoxy-5,6-diamino-2-nitropyridine was synthesized from 3,5-dichloropyridine by substitution,oxidation,nitration and ammoniation .

研究了以3-氯-5-甲氧基-2，6-二硝基吡啶为原料，通过甲氧化、硝化、氨化合成3-甲氧基-5，6-二氨基-2-硝基吡啶，该化合物的结构通过IR，1H NMR，MS和元素分析进行了表征，确认为目标化合物。

Results show that the yield of 1-methyl-4,5-dinitroimidazole is 62%,and the melting point is 77℃.

优化了合成工艺，讨论了4，5-二硝基咪唑的硝化机理。

We have designed and synthesized a novel linear conjugated polymer. PQV was obtained via sequentially nitration, reduction, cyclization, bromination and condensation from p-xylene. And the experimental condition was optimized.

本文设计合成了一种新的线型共轭聚合物，以对二甲苯等为原料，通过硝化、还原、关环、溴化、缩聚等反应合成了PQV，并对各单元过程的合成条件进行了优化。

In this paper the structure and the working principle of the model Z198 dust remover is introduced , the application and the effect of the dust remover to quick lime nitrify engineering is analysed .

对Z198型布袋除尘器的结构，工作原理等作了介绍，并分析了其在生石灰硝化工程中的应用情况及效果，同时指出了在使用过程中存在的问题。

Stable nitritation is realized because the nitrobacter is sensitive to the changing environment. When the dissolved oxygen and pH values in SBRⅠ and SBRⅡ are 2. 4-3. 0mg/L, 7. 0-8. 5, 1. 5-2. 0mg/L and 7. 0-8. 5 respectively, a lot of nitrate isn't found during operation in two months, and nitrosation rate is over 80% in two aerobic reactors.

将SBRⅠ、SBRⅡ好氧反应器的溶解氧、pH分别控制在7.0-8.5、2.4-3.0mg／L及7.0-8.5、1.5-2.0mg／L时，依赖SBR反应器水质波动大、硝酸菌对环境变化敏感的特点，在较高浓度NH〓-N条件下，实现了稳定的亚硝化反应，系统运行近两个月，没有大量硝酸盐的积累，两个好氧反应器的亚硝化率均在80％以上。

With water-alcohol as solvent, 1-amino-2-naphthol-4-sulfonic acid was prepared from β-naphthol by nitrosotion, addition, and sulphonation.

摘 要：以β萘酚为原料，在水醇混合溶剂存在下，经亚硝化、加成、磺化制得 1 氨基 2 萘酚 4 磺酸，考察了原料配比、混合溶剂配比、反应时间、反应温度及过滤等因素对反应的影响，确定了优惠工艺条件。

Research in three aspects is studied in this thesis:(1) Through many experiments,the effects of mixed acid nitratiny reagent and its constitute and the proportion of reactant,as well as the reaction temperature and time ,on the nitrating reaction were studied.

本课题主要做了三个方面的研究：(1)硝化工艺采用硫酸硝酸组成的混酸硝化，通过实验来确定适宜的物料配比、混酸的组成、温度和反应时间以及分析这些因素对反应的影响。

Experiments studied the effects of reacting conditions, solvents, catalysts etc on the reaction, and the best nitrating condition was established.

实验分析了反应条件、溶剂及催化剂等因素对反应的影响，找出了最佳硝化条件。

Denitrification gradually took over methanogenesis to become the main reaction responsible for decomposition of MSW, while nitrogen gas was generated instead. Additionally, owing to long term exposure of nitrified leachate to MSW, the bacterial structure of landfill was changed.

在此过程中，反硝化逐渐代替产甲烷作用成为填埋场内垃圾降解的主要反应，产生气体以氮气为主，而非甲烷；硝化渗滤液与垃圾的长期作用也改变了填埋场的菌群结构。

Based on incubation tests with labelled and unlabelled urea, this payer discussed the effects of hydroquinone on hydrolysis of urea, release and volatilization of ammonium, nitrification, denitrification and immobilization.

本文根据用标记和非标记尿素进行的培养试验，论述了氢醌对于尿素的水解、氨的释出和挥发、硝化和反硝化作用以及生物固持的影响。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。