查询词典 acetone

The vapor liquid equilibrium data for butanone/toluene/PMMA and butanone/acetone/PMMA systems at 308.15K have been measured.

结果显示，由于甲苯的加入，丁酮在PMMA中的溶解性有了提高，而丁酮

Based on the Na Dao Capsicum for raw materials, selection of the best extraction solvent acetone.

中文摘要：以那刀辣为原料，选用丙酮为最佳提取溶剂。

In this paper, we use carbinol , ethanol or acetone as mobile phase to compare the separation effect of TP in order to find a less poison mobile phase.

该路线有利于连续化生产，简化生产工序，节约生产时间，降低成本，能用于大规模的工厂生产，具有工业化应用前景。

Because of the inflammable nature of both celluloid and acetone, the process is extremely complicated.

这也是赛璐珞框会有一股淡淡松香的原因，因为赛璐珞和丙酮剂两者都是高挥发易燃性原料，使制作手续繁复。

The spinning solution is made by dissolving cellulose acetate in acetone containing a small amount of water (up to 10 percent).

将醋酯纤维素溶解于丙酮中(丙酮中含有少量的水，最大含水量为丙酮重量的10%)而形成纺丝液。

If needed, use alcohol or a do it yourself cental air nail polish remover containing acetone.

如果需要，使用酒精或自己做环航空指甲油剂含有丙酮。

The honey samples were dissolved in water and acetone and then extracted with hexane- chloromethane, cleaned by C18 SPE cartridge, determined by gas chromatographic electronic capture detector.

蜂蜜样品用水溶解后，经正己烷-二氯甲烷提取，提取液经C18固相萃取小柱净化，采用气相色谱仪电子捕获检测器定量测定。

The preparing process is described as follows:(1) the raw materials are dispersed in the solvent;(2) the solution is arranged between two electrodes;(3) alternating current with a voltage of 5 V-100V and a frequency of 10Hz-1000Hz is applied to both ends of the electrodes for 5minutes to one hour;(4) the product obtained after being washed with deionized water and pump filtrated or after centrifugal treatment is dried by being heated to 40 centigrade to 100 centigrade to get the nanometer grain, wherein the raw materials in the first step are micrometer materials or nanometer materials such as sulphide, selenide, telluride and oxide; without special requirement on shape or appearance, the materials can be in the shape of a rod, a fork, a star, a block or a sphere; the solvent in the first step can be water, ethanol, acetone, benzene or tetra chloromethane.

步骤为：1将原料分散于溶剂中；2使制成的溶液处于两电极之间；3在电极两端的加交流电，电压为5V-100V，频率为10Hz-1000Hz，时间为5min-1h；将产物用去离子水洗涤、抽滤，或进行离心处理后；4将所得到产物加热到40～100℃进行干燥，得到纳米颗粒。步骤1中原料为硫化物、硒化物、碲化物、氧化物等微米或纳米材料，其形貌不限，可以为棒状、枝状、星状、块状、球形等多种形状。步骤1中的溶剂可以为水、乙醇、丙酮、苯或四氯化碳。

The results of the reaction show that better regioselectivity is obtained when Cd2+ is used as additive and give stereoselective product when cinchonine is used as chiral additive.Keywords: NaBH4, Regioselective,Stereoselective,Benzoyl acetone,Metal ion

结果发现，不同的金属离子添加剂使反应出现不同的化学选择性，而Cd2+离子对苯甲酰丙酮的还原具有较好的化学选择性，同时在辛可宁存在条件下得到了对映体过量的产物。

The condensation reaction of citral with acetone catalyzed by aqueous sodium hydroxide solution to give pseudoionone was studied in detail.

前言 丙酮和柠檬醛在氮氧比钠水溶液的催化作用「生成假性紫罗兰酮是国内外应用得较为f一泛的合成紫罗兰酮的方法。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。