硝化

Firstly, micro-thermal calorimeters were used to qualitatively analyze the thermochemistry behaviour of reactants system under adiabatic mode; Subsequently a series of toluene nitration experiments were carried out in an isothermal reaction calorimeter to study the influences of different operating conditions such as stirring speed feeding rate and setting temperature and so on . The thermal hazard assessment of toluene nitration was derived from the measured calorimetric data, the rate of the reaction the adiabatic temperature increase △T_ad and maximal temperature attainable MTSR_max in a runaway situation can also been derived.

首先采用微量热分析仪对反应体系在绝热状态下的热行为进行分析；再采用等温条件下的反应量热器实验研究不同的工艺条件如搅拌速度、加料速度和设定温度等参数对反应结果的影响；结合热分析数据和RCle数据，对甲苯的一段硝化过程进行了初步的热危险分析，推导出反应速率方程、反应失控条件下的绝热温升△T_和反应所能达到的最大温度MTSR等参数。

To investigate the responding behavior of denitrifying bacteria to different carbon source (i.e. methanol, ethanol, sodium acetate, sodium propionate, glucose, domestic wastewater and endogenous carbon source), several batch experiments using the sludge from the Carrousel oxidation ditch were carried out at 15.4℃±0.8℃.

为了研究低温环境下反硝化细菌对各种碳源的直接反应，利用Carrousel氧化沟系统的活性污泥，以甲醇、乙醇、乙酸钠、丙酸钠、葡萄糖、生活污水及内源物质为碳源，在15.4℃±0.8℃低温状态下开展序批式缺氧反硝化试验。

Containing a relatively large amount of nitrogen; highly explosive; used in making smokeless powder.

含有较多氮的硝化纤维，极具爆炸性，用于制造无烟火药。

A smokeless explosive powder consisting of nitrocellulose, nitroglycerin, and petrolatum that has been dissolved in acetone, dried, and extruded in cords.

无烟线状火药一种无烟炸药，由硝化纤维素、硝化甘油和凡士林组成，在丙酮中溶解，风干并压成绳状

Microcosm study of surface water from the stream showed that no significant change in NH4-N and NO3-N concentrations occurred during the five-day incubations.

各采样点的NO2-N、DO、DOC浓度与NO3-N也存在一定的线性相关关系，说明了硝化过程的发生和氮在不同形态之间的转化。

The ten target compounds from alkyl substituent to aryl substituent that have not yet been reported,which was obtained by dehydration, Subsequently treated with sodium nitrite resulting nitroso compounds and then reduced.

本论文以2-羟基-3-萘酸和邻巯基苯胺为原料，通过分子脱水、亚硝化、还原等反应合成了10个不同取代基团的4-苯并噻唑基-[1，2-d]萘并噁唑衍生物，并优化了合成的工艺条件。

The experimental results show that the composite emulsion of nitrocellulose -alkyd resin acrylate, which is prepared by modifying the nitrocellulose with non -drying or alkyd resin, methyl methacrylate and butyl acrylate monomer under the optimized experimental conditions have good stability and excellent performance.

实验结果表明，以不干性油醇酸树脂、甲基丙烯酸甲酯和丙烯酸丁酯单体为主要原料，在优化的实验条件下对硝基纤维素进行改性，可制得稳定性好的硝化纤维素-醇酸树脂-丙烯酸酯复合乳液。

At 80℃, the yield of esterification of benzoic acid with ethanol could reach 95% by using 10% catalyst for 6 h; the conversion of toluene in the nitration with 1 equiv. of 65% nitric acid could be achieved to 99% by using 5% catalyst for 5 h.

在80℃下，摩尔分数为10%的Yb(NTf2)3负载催化剂，反应6h可使苯甲酸乙酯的产率达95%；摩尔分数为5%的Yb(NTf2)3负载催化剂，反应5h可使甲苯与等摩尔质量分数为65%硝酸的硝化反应转化率达99%。

The result indicates that the big π bond of benzene not only turns benzene into a Lewis base,but also makes it to undergo electrophilic substitution (halogenation,nitration,sulfonation and so on),rather than addition

结果表明，苯的环状大π键结构不仅使苯成为1个Lewis碱，而且使苯容易发生卤代、硝化、磺化等亲电取代反应，但不易发生加成反应。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。