查询词典 hydrochloric acid

Reduction of N-substituted-4-nitrophthalimides(1)to the corresponding amines(2)was performed in hydrochloric acid at 40 ℃ using stannous chloride as reduction agent, yielding produc...

氮气保护条件下，2与乙醇在固体光气作用下生成(2 取代 1，3 二酮 2，3 二氢 1H 异吲哚 5 )氨基甲酸乙酯(3)，3的产率为67%～92%。各化合物的结构均经1H NMR、IR、元素分析和FAB MS证实。

METHODS Ammonium sulfamate and 1 mol·L -1 hydrochloric acid were added to the benzalkonium bromide solution,which was a reference solution.

取浓度相同的两份苯扎溴铵消毒液，一份加入氨基磺酸铵和 1mol·L-1盐酸作为参比液，在 35 4 6nm测定亚硝酸钠的ΔA。

The interference of metal ions Fe(superscript 3+、Cu(superscript 2+)and so on in oil can be eliminated by using hydroxyl amino hydrochloric acid and sulfourea as masking agents.

以盐酸羟胺和硫脲作为掩蔽剂可消除Fe(上标 3+)、Cu(上标 2+)等离子的干扰，对大庆原油与锦西减四线馏分油中的钒进行测定，相对标准偏差不大于3.5%，加标回收率为

The result of hydrochloric acid-pH titration for the boron-containing concentrated brine demonstrated that the form of borate in the brine is existed as "comprehensive tetraborate".

用盐酸－pH滴定浓缩盐卤中硼酸盐的结果表明，盐卤中的硼是以&四硼酸盐&的综合统计形式存在。

Hydrochloric acid and thiosulphate solution react to give sulphur particles which can block the transmission of light. Under this merit, light sensor can be used to collect the corresponding experimental data. Analysing these data can help to find out the relationship between the concentration of solution and the rate of reaction.

由於氢氯酸与硫代硫酸盐溶液反应所释出的硫磺会影响光线进行，因此利用光度感应器便可收集有关的实验数据，透过这些数据的分析便可找出溶液浓度与这个反应速度的关系。

The authors carried many researches of the feasibility about enriching and separating trace zinc from almost cadmium, and the rate of recoveries of several common metal ions according to this methodo Through repeatedly probed and tried out, at last, a thought as collaborated with traditional methods was established - using diantipyrinylmethane as complex reagent ,with ammonium thiocyanate and zinc forming the triple ionic compound in the medium of hydrochloric acid , extracted by trichloromethane, extracted the organic system by ammonium hydroxide in order to gain zinc .

本文主要研究了从镉基体中富集分离微量锌的可行性，以及采用该方法几种常见金属离子的回收率。通过反复的摸索、试验，最终确立了与传统方法相结合的思路—采用二安替比林甲烷作为络合剂和硫氰酸铵、锌在盐酸介质中形成三元离子缔合物，用三氯甲烷作为萃取剂，最后用氨水作为反萃剂将有机相中的锌洗脱出来与镉分离。

The impacts of urediniospore activity, concentration of hydrochloric acid and physiological races of rust fungi on protoplast shrinking were also studied.

研究还发现叶锈菌和秆锈菌夏孢子活力、盐酸浓度等对夏孢子原生质体浓缩状况有很大影响，且与病菌生理小种有一定的关系。

The title compound used as an amino acetylating reagent was further reacted to yield Cefepime hydrochloric acid, the crystals obtained has white pale color and is stable to temperature, and has no E-isomer too.

用其作为氨基酰基化试剂进一步合成盐酸头孢吡肟，也得到基本上白色的对温度稳定的不含E-异构体的晶态化合物。

Intensified marinating method was put forward in paper that fertilizer was marinated in 80℃, 1∶20 ratio 2% hydrochloric acid solution and mixed round the upper solution at the same time.

文中提出了&强化浸泡法&，即以80℃、1∶20的2%盐酸溶液浸泡肥料，并用搅拌器以150 r/min的速度搅拌上层溶液。

The relations between inhibition efficiency of carb on steel in hydrochloric acid and molecular structure of compounds of benzene ni t riles were studied by constructing the grey inhibition model of inhibition syste m.

通过运用灰色理论建模思想，建立缓蚀体系的灰色缓蚀模型，研究了盐酸溶液中苯腈类化合物对碳钢缓蚀的缓蚀性能与分子结构的关系。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。