查询词典 nitric acid

We present a simple approach to determine the content of casein in crosslinked polyacylamide, i. e., protein molecules are complexed with copper ions by biuret reaction. The polymer containing proteins is cinerated at high temperature and then the residue is dissolved into nitric acid. Protein content is measured by determining concentration of copper ion in nitric acid solution using atomic absorption spectrum.

本文提出了一种在交联聚丙烯酰胺中测定酪蛋白的简便方法，即：利用双缩脲反应使蛋白质与铜离子络合，含蛋白质的聚合物在高温下灰化，残留物溶于硝酸，通过用原子吸收光谱测定硝酸溶液中的铜离子浓度来测量蛋白质的含量。

The distribution coefficients of rubidium and caesium between Cation-42, a phenolic-sulfonated cation exchange resin manufactured in Shanghai, and nitric acid as well as nitric acid-methanol or butanol mixtures have been determined by the equilibrium method.

本文用平衡法测定铷、铯在稀硝酸或稀硝酸-甲醇与华东化工学院阳-42号树脂间的分配系数，比较用硝酸及硝酸-醇作淋洗液分离铷、铯的效果，并确定0.47M硝酸是较好的淋洗液。

The mechanisms of the formation of 1, 3, 5-trinitro-1, 3, 5-triazacyclohexane in the nitrolysis of hexamethylenetetramine with nitric acid and with the mixture of nitric acid and ammonium nitrate were first studied by NMR tracing.

本文首次采用核磁共振跟踪化学反应的方法研究了在直接法和K-法中黑索金（1，3，5-三硝基-1，3，5-三氮杂环已烷，RDX）的生成反应机理。

Test result makes clear electrode - biomembrane reactor is OK the approach that saltpetre can oppose nitrify through be being raised oneself purify of nitrogen of nitric acid salt , but the purify efficiency of nitrogen of nitric acid salt and total nitrogen .

试验结果表明电极-生物膜反应器可以硝可以通过自养反硝化的途径将硝酸盐氮去除，但硝酸盐氮和总氮的去除效率。

The result makes clear: CF surface acidity is luscious it is good to increase and increase effect of acid treatment of; thick saltpetre what round amount handles time as thick nitric acid to oxidize than air, when the time that handles CF when thick nitric acid is 20 Min, tensile strength of CF/TPI composite material and flexural strength rise respectively 10% with 14%, XPS shows CF surface active is right now luscious the group increases than was not being handled 35.89%.

结果表明：CF表面酸性官能团的数量随着浓硝酸处理时间的增加而增加；浓硝酸处理效果比空气氧化好，当浓硝酸处理CF的时间为20 min时，CF/TPI复合材料拉伸强度和弯曲强度分别提高10%和14%，XPS表明此时CF表面活性官能团比未处理增加35.89%。

Nitro-4-methylsulfonylbenzoic acid was prepared from 4-toluene sulfonyl chloride by the reaction of Alkylation (in the condition of sodium sulfite and baking soda), Nitrification (in the condition of nitric acid and vitriol) and Oxidation reaction (in the condition of nitric acid and catalyzer).

研究了以对甲苯磺酰氯为起始原料，首先通过亚硫酸钠和碳酸氢钠的水溶液进行烷基化、其次在浓硝酸和浓硫酸加热回流的条件下峭化、最后在浓硝酸和催化剂的条件下进行氧化，3步反应合成了玉米田高效除草剂甲基磺草酮的重要中间体2-硝基－4-甲磺酰基苯甲酸。

The formation of nitric oxide from nitric acid and mercury is applied in a volumetric method of analysis for nitric acid or its salts.

硝酸与汞生成一氧化氮的反应已用于硝酸及其盐类的容量分析法中。

The research result of the reaction between DMHAN and heptavalent technetium in nitric acid indicates that, in the studied range, DMHAN does not react with heptavalent technetium, which means that, heptavalent technetium does not directly consume DMHAN. 4, The research result of the reaction between MMH and Tc in nitric acid indicates that, this reaction is composed of three stages, induction period, fast reaction period and the termination of the reaction.

3，DMHAN和七价锝反应的研究结果表明：研究范围内，DMHAN不与七价锝发生反应，即七价锝的存在不会造成还原剂DMHAN的消耗； 4，MMH与七价锝反应的研究结果表明：MMH与七价锝的反应分为三个阶段，即诱导期、快速反应阶段和反应终止。

Nitric acid media most common metal corrosion in nitric acid was rapidly destroyed, stainless steel is the most Gate Valves widely used nitric acid-resistant materials, all concentrations of nitric acid at room temperature have good corrosion resistance, it is worth mentioning that the stainless steel containing molybdenum ( such as 316,316 L) of nitric acid corrosion resistance is not only no better than ordinary stainless steel (eg 304,321), and sometimes even better.

硝酸介质一般金属大多在硝酸中被迅速腐蚀破坏，水力控制阀不锈钢是应用最广的耐硝酸材料，对常温下一切浓度的硝酸都有良好的耐蚀性，值得一提的是含钼的不锈钢（如316、316L）对硝酸的耐蚀性不仅不优于普通不锈钢（如304、321），有时甚至不如。

Test Preparation Transfer about 2 g of the substance under test, accurately weighed, to a glass-stoppered, 250-mL conical flask, add 20 mL of a mixture of equal volumes of nitric acid and sulfuric acid, attach a suitable condenser, reflux the mixture for 1 hour, cool, cautiously dilute with water, and boil until fumes of nitrous acid no longer are noticeable.

Test准备 Transfer大约2 g在测试之下的物质，准确地被称，对玻璃防止， 250ml conical烧瓶，增加硝酸的相等的容量混合物的20 mL，并且硫酸，附有一适当的 condenser，循环加热混合物1个小时，凉快，慎重地稀释与直到亚硝酸发烟的水和煮沸 acid不再是引人注目的。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。