查询词典 trichloromethane

Edgewax: Waxing method recommended for lubricating release prints; treatment is with a solution of 50 grams of paraffin wax per litre of trichloromethane applied only to the edges of the emulsion side of the film.

片边腊润：用封腊的方法来润滑用于发行的拷贝；这种方法是用每升三氯乙烷溶解50克石蜡形成的溶液，只用于处理胶片的乳剂面的侧缘。

Under the optimum conditions (i.e., reaction at 40℃ using hyperthermophilice esterase APE1547, 4-Cl-benzaldehyde substrate, and trichloromethane solvent), this reaction provided optically active secondary alcohol with an enantiomeric excess up to 56% and a yield up to 78%.

在最适条件（嗜热酯酶APE1547为酶源，反应温度40℃，氯仿为溶剂，4-Cl-苯甲醛为底物）下，加成反应生成的光学活性醇产率最高达78%，ee值最高可达56%。

The thermal property studies indicate that the mass loss of compound B was 54.39% at 242.2~750℃, and when the temperature was 1000℃, there was 25.11% char residue left, which showed that the title compound has a good thermal stability and char forming capability. Using acetonitrile as the solvent instead of trichloromethane or 1, 2-dichloethane gave higher yield. During the synthesis, the yield was very low when triethylamine was used as acid acceptor alone, and when a little amount of 4-dimethylaminopyridine was added at the same time, the yield could be 81%.

结果表明，所合成的化合物B的结构与预期的结构一致；热性能研究表明，化合物B在242.2~750℃质量损失为54.39%，1000℃时仍有25.11%的炭残渣，显示出优异的热稳定性和成炭性；在相同反应条件下，用乙腈作为溶剂的反应产率比使用氯仿和二氯乙烷为溶剂的高，并且在合成过程中，单独使用三乙胺作为缚酸剂时产率很低，而当同时加入少量4-二甲氨基吡啶时，产率可达81%。

Low concentration of Fe〓 and Mn〓 could enhance photocatalytic degradation of trichloromethane、Aroclor1260 and humic acid, but when the concentration of Fe〓 and Mn〓 was high, it could prevent photocatalytic degradation.

研究发现当溶液中Fe〓及Mn〓浓度较低时，对光催化降解三氯甲烷、Aroclor1260及腐殖酸有一定的促进作用，但当浓度逐渐增加时，这些离子又对光催化降解起阻碍作用。

Methods 0mit and alter some work procedure including distillation,store reagent that show color,either the order of reagent procedure or recycle of the waste trichloromethane.

方法有条件的简化蒸馏步骤、显色剂储存使用、改变显色剂与氯仿的加入顺序、氯仿废液回收循环使用。

The bromine value of petroleum products was determined by potential titration in mixed solvents of glacial acetic acid,trichloromethane,methanoland sulfuric acid,this method was compared with indicator titration,the experimental results show the method relative standard deviation is smaller.

以冰醋酸、三氯甲烷、甲醇和1：5的硫酸(体积比为714：134：134：18)作为滴定溶剂，采用电位滴定法测定石油产品的溴值，并与指示剂滴定法进行对比。

Activated Carbon - Effectively remove organic contaminants, chlorine, trichloromethane, and insecticide.

活性碳：可过滤水中异味、氯、重金属与有害的有机化合物，并增添饮水甘甜口感。

Acetonitrile-sodium chloride, trichloromethane and acetone-dichloromethane were used to extract organophosphorous pesticides respectively. Pulsed-flame photometer detector was used to analyze the extraction rate of these three solvents. Flame ionization detector was used to analyze the content of impurity in the samples extracted by those three solvents.

分别采用乙腈－氯化钠法、三氯甲烷法和丙酮－二氯甲烷法提取蔬菜样品中残留的有机磷农药，使用带脉冲式火焰光度检测器的气相色谱法比较了三种提取方法有机磷农药的提取效率，使用带火焰离子检测器的气相色谱法分析了三种提取方法杂质溶出量。

Five species of solvents, namely, acetone, ethyl acetate, ether, trichloromethane and petroleum ether were selected to obtain extracts from Portulaca oleracea L. with microwave assistance and the biological activities of each extract was tested against Plutella xylostella L.

在微波加热条件下，以丙酮、乙酸乙酯、乙醚、三氯甲烷和石油醚为溶剂对马齿苋干粉进行提取，试验了各溶剂提取物对小菜蛾幼虫的触杀、胃毒及拒食活性，确定了石油醚提取物触杀作用的LD50。

Taking into account the actual situation of the waterworks production,two suggestions were proposed for reducing the formation of trichloromethane one was optimizing the pre-treatment chlorine adding methed and selected a suitable point for chlorine adding;and the other one was improving the effic.

通过分析某水厂水处理过程各阶段水样中的三氯甲烷生成情况，讨论常规水处理对三氯甲烷生成的影响，并结合该厂的生产实际，提出水处理过程中降低三氯甲烷生成的建议：一是优化前加氯投加方式，选择合适的加氯点；二是提高原水浊度的去除率，减少消毒副产物的前驱物质。

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。