查询词典 NH

Aromaticity of Various Possible Isomers of C36XX=O, NH, S

篇名 C36X各种可能异构体的芳香性研究

A new method of oscillographic titration for the determination of nitrogen content in flour is described The sample was digested with H 2SO 4 Na 2SO 4 CuSO 4 Oscillographic titration is conducted on NH + 4 with Na TPB method,then calculate the nitrogen content Compared with standard methods,this method choose innoxious titrant,has a sharp titration endpoint, needs no distillation absorption and indicator It has the advantages of being easy and quick in operation,and the determination re...

研究了面粉中蛋白质含量的示波滴定法。样品用H2 SO4 Na2 SO4 CuSO4 消化处理，N以NH4 +的形式存在于试液中，用过量四苯硼钠沉淀铵，沉淀过滤，过量的四苯硼钠用氯化四乙基铵标准溶液返滴定，以四苯硼钠切口消失为终点，计算出氮含量，再换算为蛋白质含量。与通用的标准分析方法相比较，本方法所用试剂无毒，终点变化敏锐，不需蒸馏吸收，不外加指示剂，具有操作简便、快速，测定结果准确可靠。

The research of produce potassium nitrate by using ammonium nitrate (NH 4NO 3) potassium chloride as raw materials, the methodology was double decomposition reaction and non-circulation.

研究了以硝酸铵和氯化钾为原料复分解非循环生产硝酸钾的工艺；实验制得了农业级的硝酸钾。

The solubility diagrams of the K〓, NH〓‖Cl〓, SO〓-H〓O systems are the basis of ammonium sulfate and potassium chloride double decomposition for producing potassium sulfate.

K〓，NH〓‖Cl〓，SO〓-H〓O体系是—存在多种固溶体的水盐体系，由于其体系的特殊性，近年来引起人们的广泛关注，并进行了积极的研究。

The NH〓/CO〓=2in accordance with the constitutes of ammonium carbamate can not be separated by ordinary methods, The separation way which used the different absorption rates of high gas velocity between ammonia and carbon dioxide in aqueous solution has been made up in this study.

在实验室高速喷射鼓泡反应器的条件下，研究了M〓/M〓=2的混合气体在水溶液中的选择性吸收过程，获得了良好的选择性效果：连续吸收的选择性因子S〓在2.06～8.23之间，S〓在2.86～10.83之间。

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。