查询词典 solvent

The other was aimed at developing novel solvent system instead of oleum. A kind of solvent system mixed by phosphotungstic acid and acetic acid was put forward.

在实验室中进行了催化剂的考察工作以及工艺条件的考察工作，对实验结果进行了分析和探讨，讨论了各催化剂的催化循环机理，并建立了相应的动力学模型。

In this thesis we adopt solvent and non-solvent method to make sol not only become oversaturated but also precipitate crystalloid.

本文采用溶剂-非溶剂法，使溶液变为过饱和而析出晶体，高氯酸铵晶体包覆纳米级亚铬酸铜形成复合粒子，较好地解决了这一问题。

For intramolecular electron transfer reactions in solution,the fluctuations of the intramolecular vibrational modes are much faster than that of solvent mode.Thus,the reaction-diffusion equation is commonly used to describe the motion of solvent,with a sink function to treat the vibrational high-frequency mode.Based on this theory-so -called the Sumi-Marcus theory,we proposed an imaginary-time split operator approach to solve the reaction-diffusion equation.The approach is applied to evaluate the intermolecular ET rate between oxazine 1 and N,N-dimethlaniline.By measuring the two average survival times of the donor state probability and the rate constant in long time limit,the full kinetics of the ET is revealed with a variety of sink functions.

对于扩散控制的溶液中的电子转移反应，分子内振动模的运动比溶剂运动快很多，Sumi-Marcus理论提出用反应扩散方程(reaction-diffusion equation)处理溶剂的扩散运动，而分子内的振动用sink函数来表示，我们基于此理论发展了用虚时间分裂算符的方法(imaginary-time Split operator approach)解反应扩散方程，并将其应用于嗪1(oxazine 1，OX1)和N，N-二甲基苯胺分子之间的电子转移反应，Sink函数采用几种不同的微扰表达式，通过计算得到给体几率衰减的两种平均速率和长时间极限下的速率常数，揭示了该体系电子转移过程中的一些动力学性质。

We promise to use hydrocarbon dry cleaning solvent, which is harmless to human being, no perchlorethylene dry cleaning solvent would be used.

本中心承诺采用对人体健康无伤害的碳氢化合类干洗溶剂，绝不使用对人体有毒害的四氯乙烯干洗溶剂

We report here creativity using compound solvent as solvent is the unique of the new technology on the basic of perpendicularity experiments and with the actual situation of our country, the effect of reaction temperature, reaction time, rate of material were optimized. Rate of yield can reach beyond 98% and this technology has successfully applied in practical production with the output of 300t per year.

解决以上两个问题是改进得克隆生产工艺的关键，本文针对上述问题，并且结合我国实际情况，在正交试验的基础上创造性的选择了复合溶剂，改进了得克隆的生产工艺，确定了最佳的投料比、反应温度、反应时间等反应条件，溶剂可以循环利用，并且得到了98％以上的高产率。

Solvent dosage is 10mL/ gram epichlorohydrin. The yield of 5-chloromethyl-2-oxazolidinone was more than 65.2%. 5-Chloromethyl-2-oxazolidinone and sodium phenolate were condensated to give 5-phenoxymethyl-2-oxazolidinone after taking off the sodium chloride in yield of 63.0%~78.0%. Dimethylsulfoxide was used as the solvent, and orthogonal experiment to the reaction condition had been carried out.

用5-氯甲基-2-噁唑烷酮和酚钠缩合，脱去氯化钠后生成5-芳氧甲基-2-噁唑烷酮类化合物，选用二甲亚砜为溶剂，对反应条件进行了正交实验，最佳条件为：反应温度120℃、反应时间20h、物料配比1：1，产率为63.0%～78.0%。

In the system of A-D phenothiazine derivatives, the transition dipole moments M flu were determined mainly by direct interactions between the solvent-equilibrated fluorescence 1CT state and ground state because of their lack of significant change with increase of the solvent polarity.

在此吩噻嗪衍生物的体系里，荧光过渡态偶极矩主要由溶剂平衡的电荷转移态和基态间的作用所决定，因为它在不同极性的溶剂中缺乏明显的改变。

The effect of reaction time, leaching times and solvent PH, ratio of raw material and solvent, PH of phytin, settling time on phytin yield and quality, extracted from tikitiki , were studied.

对米糠中提取菲丁的工艺条件进行了优化，考察了酸浸时间、酸浸次数、酸浸pH值、液料比、中和pH值、静止时间等因素对产品的产量和质量的影响，得出了优化的工艺条件。

If crystals start to form in the pipet stop add a little more hot solvent to the solution and a drop or two hot solvent to the filtration pipet.

那就要停止过滤，把少量更加热的溶剂加到溶液中，而且向过滤移液管中加入1或2滴的热的溶剂。

The solvent effects were investigated by means of the polarizable continuum model using THF as a solvent at B3LYP/6-31G level.

在B3LYP/6-31G水平上，以四氢呋喃为溶剂，采用可极化连续模型研究了溶剂化效应。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。