查询词典 solvent

Aqueous polyurethane is dispersed in water media, which has not only the excellent properties of solvent-borne polyurethane with low temperature resistance, great adhesion, as well as outstanding toughness combined with good flexibility, but also advantages of incombustibility, low odor and environmental iLndliiiess that solvent-borne adhesive has not.

水性聚氨酯以水为分散介质，它不仅具有溶剂型聚氨酯的耐低温、柔韧性好、粘接强度大的优良性能，而且具有不燃、气味小、不污染环境等溶剂型胶粘剂所不具备的优点，因此倍受国内外研究人员的重视。

In this paper, the conventional isopiestic technique have been modified and extended to multicomponent unsaturated mixed solvent solutions, each containing two or three volatile solvents and two unsaturated solutes, and multicomponent saturated aqueous solutions, each containing two unsaturated solutes and one or two saturated solutes. Isopiestic measurements have been conducted systematically for the first time for two mixed solvent electrolyte solutions, two quaternary saturated aqueous solutions and three quinary saturated aqueous solutions and the experimental results have been compared with the ideal-like solution model.

本文将传统的等压技术，经过改进后，进一步应用于含有两种或三种挥发性溶剂和两种非饱和溶质的多元混合溶剂溶液以及含有一种或两种饱和溶质和两种非饱和溶质的多元饱和水溶液，首次系统地测定了两例混合溶剂电解质溶液、两例四元饱和水溶液和三例五元饱和水溶液的等压平衡，并将实验结果与类理想溶液模型进行了比较。

Large-volume injection in capillary gas chromatography was developed for determining the trace components in environmental samples and for reducing the need for cleanup step, also for on-line connection of liquid chromatography with CGC. The key features of the LVI include sample retained by a large capacity volume liner or a retention gap, and solvent vapor eliminated by solvent vapor exit.

在毛细管气相色谱法中，采用大体积进样技术，即使用能够容纳大体积样品的进样装置以及增加可控时间的溶剂蒸汽放空装置，可以满足环境样品中超痕量组分的分析要求，简化样品浓缩步骤以及实现液相色谱与CGC的在线联用。

Finally, with the language of VB, the process of extractive rectification was simulated with the method of tri-opposite angles matrix and the effect was researched the ratio of raw and solvent, theory plate number and the feed position of raw and the solvent on the purity of mesitylene was studied.

编制VB程序，结合三对角矩阵法模拟萃取精馏过程，并考察了回流比、溶剂比、理论塔板数、溶剂及原料进料位置对萃取分离效果的影响，为下一步的小试提供了数据基础。

By analyzing the result of these experiments, we realizing that the solvent is very essential in the controlling of the crystallizing and the melting salt works as solvent is possible, and we proposed the idea of operating chemical metathesis synthesizing in melting salt.

通过对实验结果的分析，根据溶剂对于纳米晶粒生长的重要性和熔盐作为溶剂的可能性，我们提出了熔盐中的化学交换法的思路。

At each fixed solvent composition,the mean activity coefficients of KI decrease at first and then increase with KI molality increases.At each fixed KI molality,the activity coefficients decrease with an increase of methanol in solvent mixtures.

目前文献报道较多的是单一电解质在混合溶剂中活度系数的测定[2-5]以及混合电解质体系活度系数的测定[6-9]，但KI在甲醇-水混合溶剂中的活度系数测定尚未见报道。

The optimum reaction conditions were found finally. The results showed that the suitable conditions are under methanol solvent reaction temperature 40℃,the concentration of catalyzer TS-1 0.6%.,reaction time 60 minutes,propylene pressure 0.4Mpa under methanol solvent.Under Supercritical fluid system,the reaction temperature was 33.7℃(supercritical and near critical temperature),the reaction pressure was 7.58Mpa(near critical pressure and critical pressure range. propylene ), propylene pressure 0.65Mpa, reaction time 45min, cosolvent molality 4%.

而超临界体系下反(来源：4e56ABC论文网www.abclunwen.com)应温度适宜在近超临界和临界温度(33.7℃)以上，反应压力也是接近临界压力或者处于临界压力范围(7.58Mpa)，丙烯压力是0.65Mpa，反应时间45min，共溶剂甲醇摩尔浓度4%，在此反应条件下，反应的转化率98%，选择性96%，收率94%，与传统条件相比较，收率提高了20%左右。

It is found that with the increase of solvent/polymer interaction parameterx_(23 or nonsolvent/polymer interaction parameterx_(13 the miscibility gap decreaseses.The effect of nonsolvent/solvent interaction parameterx_(12 on the binodal curve is relatively complicated.

2通过考察相互作用参数对三元体系相图的影响，发现随着溶剂/聚合物之间相互作用参数x_(23)或者非溶剂/聚合物之间相互作用参数x_(13)的增加，均相区减小。

The CPP was separated into five fractions using fractional precipitations by solvent/nonsolvent technique. Densities for binary mixtures of five fractionated and unfractionated CPP which contains a mass fraction of 30 % chlorine with solvents were determined. At a fixed temperature, concentration and solvent, the densities for binary mixtures of fractionated and unfractionated CPP with solvents have the same value.

用沉淀分级方法对氯含量为30％的氯化聚丙烯进行分级，得到5种窄分子量的级分，测定了氯化聚丙烯的不同级分与不同溶剂组成的二元混合物溶液的密度，在溶剂一定、浓度一定、温度一定时，不同级分氯化聚丙烯溶液的密度是相同的，不受分子量及其分布的影响。

Oil of turpentine is favoured over petroleum solvent s as an oil-paint thinner, varnish solvent , and brush cleaner.

在用作油漆、可挥发性溶剂以及油彩刷的清洁剂等方面，松脂比石油效果更好。

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％。