查询词典 alkali reaction

It indicated chemistry reaction occurred between cellulose and alkali and got alkaline cellulose.

碱与纤维素作用时，纤维素会发生化学作用生成新的化合物——碱纤维素；纤维素会发生物理化学作

The effects of reaction temperature, pressure, the ratio of actual air amount to theoretical air amount, reflux rate, the contents of oil and impurities settled in alkali waste on the removal of sulfides, phenol and CODer were discussed.

同时对影响系统操作和氧化处理效果的反应温度、压力、空气比、回流量、含油量和杂质沉淀物等若干主要因素进行了分析论述。

Therefore, the nickel impurity in the chromium-plating bath was determined using spectrophotometry, which was based on the reaction between nickel ions and diacetyldioxime, generating a red complex, in the presence of alkali and ammonium per-sulfate. The measurement was carried out in 3cm color-matching cells at a wavelength of 510nm, using the sample without chromogenic agent as the reference.

在碱性和过硫酸铵存在的条件下，镍离子与丁二酮肟生成水红色配合物，利用这一特性，以丁二酮肟光度法测定镀铬溶液中镍杂质的含量，以不加显色剂的试样作参比液，用3cm比色皿，在波长510nm处测定。

On the basis of the Frontier Orbital Theory and three Bonding Principles, the possibility of reaction of active HOSA^- carbanion on polymerization process of MA by alkali catalyst and the mechanism of anionic polymerization of maleic anhydride were studied.

应用前线轨道理论和成键三原则研究了碱催化条件下马来酸酐均聚过程中α-羟基丁二酸酐碳阴离子活性中间体参与反应的可能性及其阴离子聚合机理。

In the second part, quantum chemical AM1 methods were employedto theoretically investigate the electronic structures of maleic anhydride in ground- and excited-states. On basis of the frontier orbital theoryand three bonding principles, the possibility of reaction of active α-hydroxysuccinic anhydride carbanion and active α-hydroxy-succinic anhydride radical on polymerization process of MArespectively by alkali catalyst and by hydroxyl radical was discussed. Theanionic and radical polymerization of MA discussed also. Theoreticalstudies show that both polymerization products of MA are in the chainstructures, corresponding to the experimental findings.

第二部分用量子化学AM1方法，计算研究了马来酸酐的基态和激发态电子结构；应用前线轨道理论和成键三原则分别探讨了碱催化条件下和羟基自由基引发下马来酸酐均聚合过程中α-羟基丁二酸酐碳阴离子和α-羟基丁二酸酐碳自由基活性中间体参与反应的可能性及由它们引发的马来酸酐阴离子聚合反应机理和自由基引发聚合反应机理；理论研究表明马来酸酐的均聚合产物均为链式结构，与实验事实相相符。

Edit this paragraph the reasons for the color reaction of flame When the alkali metal and its salts in the ignition flame, the atoms absorb the energy of the electron from the orbit of low-energy transition to a higher energy orbit, but at a higher energy orbit is unstable electronic, it is fast transition back to a lower energy orbit, then the energy will be redundant form to emit light.

编辑本段焰色反应的原因当碱金属及其盐在火焰上灼烧时，原子中的电子吸收了能量，从能量较低的轨道跃迁到能量较高的轨道，但处于能量较高轨道上的电子是不稳定的，很快跃迁回能量较低的轨道，这时就将多余的能量以光的形式放出。

However, due to the structure of alkali metal atoms in different electronic transition energy when the change is not the same as on the different wavelengths of light, the color reaction from the flame in the experiment see the special flame color, the color spectrum is the spectrum.

但由于碱金属的原子结构不同，电子跃迁时能量的变化就不相同，就发出不同波长的光，，从焰色反应的实验里所看到的特殊焰色，就是光谱谱线的颜色。

The research aimed to study the physiological reaction of 4 Kinds of wild halophytes in salt and alkali area in Tianjin.

目的］研究天津盐碱地区4种盐生植物在盐胁迫下的生理反应。

This paper summarises the category and mechanism of alkali aggregate reaction, and presents the diagnostic methods and preventive measures of AAR, combined with the research situation and development of AAR in the world.

概述了碱集料反应的类型与机理，结合国内外碱集料反应研究的进展情况，提出了碱集料反应的诊断方法和防治措施。

The internal causes are the effects of salts, particularly chlorides and sulphates, in the constituent materials, interaction between the constituent materials, such as alkali aggregate reaction, volume changes, absorption and permeability.

内部起因是盐，特殊氯化物的作用和硫化，在构成材料，互作用在构成材料之间，譬如碱聚集体反应、容积变化、吸收和渗透性。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷