溶剂

On the basis of above works, dibutyl sebacate and 1、2-cyclohexanedicarboxylic acid diisobutyl ester were chosen to be absorbents of MA according to the solubility and property of solvents.

第二：在前一部分工作基础上，考虑了溶解度测定结果和溶剂本身性质选择有机溶剂癸二酸二丁酯和溶剂六氢化邻苯二甲酸二异丁酯作为吸收顺酐的吸收剂。

The spectroscopically free anion and contact ion pairs are found in PC, EC, DMF, BL, DMSO and acetone solvents, and dimer of contact ion pairs in other solvents.

同时，本文还利用特征谱带的相对强度研究了锂离子在PC-DEC、PC-DMF、EC-DMC、DMSO-AN、DMSO-AN、DMF-THF等二元混合溶剂中的优先溶剂化，锂离子一般被DMF、DMSO分子优先溶剂化。

This article makes a study of the effects of six different solvents on lacquer wax extraction of the Japanese Rhus succedanea,concerning the rate of extraction,the albedo value,melting point and chemical characteristics.

研究6种不同溶剂对日本野漆蜡的萃取率、白度值、熔点和化学特征值的影响。结果表明，溶剂种类对日本野漆蜡萃取率和白度值具显著性影响，但对熔点和化学特征值影响较小。试验得出石油醚(30~60℃)是漆蜡萃取的最佳溶剂，浸提温度低，时间短，漆蜡萃取率高，产品白度值高、色泽好，操作过程安全

The results showed that dimethyl sulphoxide and formamide were not rational choices for gel spinning process of high-relative viscosity nylon 6 when m- cresol, sulfonic acid and form.

结果表明：二甲基亚砜和甲酰胺不宜作高相对粘度尼龙6的冻胶纺丝溶剂，硫酸、甲酸和间甲酚比较适宜；提高温度有利于降低剪切速率，质量分数为12％的间甲酚溶液和质量分数为9％的甲酸溶液作溶剂，其尼龙6溶液分别在50～60℃和45℃以上有较好的可纺性；溶剂对尼龙6晶体结构的形成有着重要的影响。

A series of 3,3,6,6 tetramethyl 1,8 dioxo 9 aryl 1,2,3,4,5,6,7,8,9,10 decahydro acridines have been synthesized by the condensation of aromatic aldehydes, 5,5 dimethyl 1,3 cyclohexanedione and ammonium acetate in the presence of triethylbenzylammonium chloride as catalyst in water.

芳醛、5 ，5 二甲基 1，3 环己二酮与醋酸铵在三乙基苄基氯化铵催化下以水作为溶剂反应，生成一系列 3 ，3 ，6，6 四甲基 1，8 二氧代 9 芳基 1，2 ，3 ，4，5 ，6，7，8，9，10 十氢吖啶，与其它溶剂相比，水作为该反应的溶剂具有价格便宜，不易燃和无毒等优点，而且产率较高，产物的结构通过单晶X射线确

The optimum conditions of PSE extraction of isoflavonoids from Pueraria lobata were as follows: methanol as solvent, temperature at 140℃, pressure under 8.27 MPa, 10 min duration and transpositional volume as 60%.

优选出最佳提取条件：溶剂为甲醇；温度140℃；提取时间10 min；压力8.27 MPa，置换体积为60%，并与葛根药典提取方法进行比较，结果表明：加压溶剂提取法具有提取时间短、溶剂消耗少、提取效率高、重现性好、操作模式多样化以及操作过程自动化等优点，将有助于中药质量控制提取过程的标准化。

Based on the retention and Z (the number of solvent molecules involving in t he displacement from stationary-phase surface ), log I (a constant relating t o the affinity of 1 mol of solute to the bonded stationary phase ), and j (a const ant r elating to the affinity of 1 mol of solvent to the bonded stationary phase ), th e elution strength of acetic acid-water mobile phase was found to be stronger th a n that of methanol-water-TFA.

用参数Z （1 mol溶剂化溶质被溶剂化固定相吸附时从两者接触表面释放出置换剂的摩尔总数），log I （与1 mol溶质对固定相亲和势有关的常数）和j（与1 mol溶剂对固定相亲和势有关的常数）对9种蛋白质在此流动相体系中的保留进行了表征。

As a result, dual fluorescence was observed in non-polar solvents. Long-wavelength emission was found to consist of two components:+D||A" exciplexes resulted by "harpooning effect" and +D^^A" exciplexes stablized by solvation.

研究结果表明：合成的化合物在非极性溶剂中有双重荧光的稳态发射行为；双重荧光中的长波长发射经时间分辨光谱研究为双指数发射衰减；其中的长寿命衰减是由于该类化合物在非极性溶剂中激发后经过分子内电荷转移形成了激基复合物所致，而产生该激基复合物的直接原因是由于在非极性溶剂中的&harpooning effect&所致，短寿命则来自于该类化合物激发后在溶液中发生了分子内电荷转移的直接衰减。

Using hydrotreated gas oil as solvent, under the conditions of a reaction temperature of 400 C, a hydrogen partial pressure of 10 MPa and a reaction time of 1 h, a portion of coke deposits could be removed yet without the function of hydrogenating coke.

采用溶剂萃取法除去工业失活催化剂上沉积的焦炭和金属的研究结果表明，用四氢呋喃、吡啶和喹啉这3种含杂原子的有机强溶剂常温萃取催化剂，其去除焦炭能力很弱，而且会因这些溶剂的强吸附作用污染催化剂；盐酸洗涤能有效去除催化剂表面的钙、铁沉积层，但不能去除焦炭；低芳香性的加氢瓦斯油在400 C、H2压力为10MPa、反应1h的条件下可部分去除催化剂上的焦炭，但不具备强的氢化焦炭作用；1，2，3，4-四氢化萘因具有供给原子氢的能力，可以有效地氢化和去除催化剂上的焦炭。

Firstly, the effect of solvent on the process of PO impregnation on TS-1 by the method of products impregnating was studied.

在TS-1催化丙烯环氧化反应中，溶剂或混合溶剂的各组分含量及性质对TS-1的催化活性、PO选择性以及反应后催化剂上的沉积物种类和含量的影响很大，有机溶剂的极性经验参数E_T(30)越大，催化剂活性越高。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了