查询词典 solvent

The main results are as follows: 1.Through the solvent contrast test and the single-factor tests ensure that the best extraction solvent and the relevant factors effect on extraction rate.Orthogonal tests are use to assure the optimal method of extracting phenol compounds from Pistacia vera L .

主要结果如下： 1、通过溶剂对比试验及单因素试验确定了从阿月浑子叶片中提取总酚的最佳提取溶剂及影响浸提率的相关因素，并通过正交实验优化了最佳提取工艺条件：利用80%的丙酮水，按1：50的料液比，在60℃下连续浸提两次，每次60min。

Polyvinylidene fluoride was used to prepare solvent base fluorocarbon coating, and the solvent constitution of PVDF coating was screened and optimized.

摘要用聚偏氟乙烯树脂制备了溶剂型氟破涂料，筛选并优化了PVDF涂料的溶剂组成。

The activity of the reaction performed in protonic solvent was higher than that of non-protonic solvent.

发现在质子型溶剂中的反应活性要优于在非质子型溶剂中的活性。

The resin is prepared by swelling chlorine balls in a solvent such as nitrobenzene; adding catalyst to obtain polystyrene-divinylbenzene adsorptive resin; removing reaction mother solution; washing to remove residual solvent and catalyst; swelling; adding pyrane reagent to further react with chloromethyl residual on inner and outer surfaces of the resin to obtain the pyranyl modified adsorptive resin with the composite function.

该树脂的制备方法：将氯球溶胀于硝基苯等溶剂中，加入催化剂，得到聚苯乙烯-二乙烯苯吸附树脂；抽尽反应母液，洗去残留的溶剂和催化剂；溶胀，加入吡喃试剂与树脂内外表面残留氯甲基进一步反应，可制得吡喃基修饰复合功能吸附树脂。

With hydroxy safflor yellow A as the standard, the conditions of extracting yellow pigment were discussed, including extraction solvent, extraction temperature, extraction time and the volume of extraction solvent.

方法］以羟基红花黄色素A为对照品，对萃取红花黄色素影响因素，包括提取剂，提取温度、提取时间、提取溶剂体积等进行单因素的考察。

Squeege solvent, and aim at gender plate in use to contact various types of inks and solvent, such as ethanol, gasoline and so on.

刮不活的耐溶剂性别不活在搁置洋给隔绝百般油墨及溶剂，例如：乙醇，汽油等。

General styryl products use of alcohol and petroleum solvent kind of weak solvent-cracking occurs, some substrate materials because of their factors will also cause cracking phenomenon.

凡是苯乙烯成品搁置酒精和火油解溶剂类弱溶剂也会爆发龟裂，一些承印物质料由于本身成分也会导致龟裂的本体爆发。

Supercritical carbon dioxide extraction of lutein ester from marigold(Tagetes erect L.)with continuous co-solvent ;2. This paper reviews comprehensively the machinary and methods of co-solvent added in the supercritical CO2 for extraction of natural products.

综述了夹带剂在超临界CO2萃取天然产物中的作用机理、使用方法、夹带剂的种类，以及夹带剂在提取生物碱、酚酸、皂苷、黄酮、脂肪酸等天然产物中的应用。

Parameters for extraction of polyphenols from pu"er teaThe influence of temperature, heating time, ratio of tea to solvent, con centration and pH value of solvent on extraction rate of pu"er tea polyphenols were studied.

1普洱茶多酚浸提条件的优化以普洱茶为原料，研究浸提温度、浸提时间、料液比、溶剂浓度对普洱茶多酚提取率的影响。

Polyester nanofiber can be prepared by electrospinning process from PET chips separately dissolving in three kinds of solvents,namely,the mixture solvent of phenol and tetrachloroethane ,trifluoroacetic acid and the mixture solvent of trifluoroace- tic acid and dichlormethane.

利用静电纺丝法制备聚酯纳米纤维，选择苯酚和四氯乙烷，三氟乙酸，三氟乙酸和二氯甲烷3种溶剂分别溶解PET切片进行静电纺丝，通过扫描电子显微镜对纤维表面形态进行观察，结果表明：三氟乙酸和二氯甲烷混合溶剂溶解PET制备的电纺纤维较好。

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。