查询词典 petroleum ether

"General anesthesia induces loss of consciousness, most often using hydrocarbon s (e.g., cyclopropane, ethylene); halogenated hydrocarbon s (e.g., chloroform, ethyl chloride, trichloroethylene); ethers (e.g., ethyl ether or vinyl ether);"

全身麻醉药会让人丧失意识，最常用的是烃；卤化氢(如氯仿、氯乙烷、三氯乙烯)；醚如乙醚、乙烯醚

"General anesthesia induce s loss of consciousness, most often using hydrocarbons (e.g., cyclopropane, ethylene); halogenated hydrocarbons (e.g., chloroform, ethyl chloride, trichloroethylene); ethers (e.g., ethyl ether or vinyl ether);"

全身麻醉药会让人丧失意识，最常用的是烃；卤化氢(如氯仿、氯乙烷、三氯乙烯)；醚如乙醚、乙烯醚

"General anesthesia induces loss of consciousness, most often using hydrocarbons (e.g., cyclopropane, ethylene); halogenated hydrocarbons (e.g., chloroform, ethyl chloride, trichloroethylene); ethers (e.g., ethyl ether or vinyl ether);"

全身麻醉药会让人丧失意识，最常用的是烃；卤化氢(如氯仿、氯乙烷、三氯乙烯)；醚如乙醚、乙烯醚

"General anesthesia induces loss of consciousness, most often using hydrocarbons (e.g., cyclopropane, ethylene); halogen ated hydrocarbons (e.g., chloroform, ethyl chloride, trichloroethylene); ethers (e.g., ethyl ether or vinyl ether);"

全身麻醉药会让人丧失意识，最常用的是烃；卤化氢(如氯仿、氯乙烷、三氯乙烯)；醚如乙醚、乙烯醚

At the same concentration, extracts show the highest scavenging rate on the four different free radicals extracted by ethyl ether, acetone, ethyl ether and ethyl acetate, respectively.

在相同的浓度下，对自由基的清除作用最大的分别为乙醚、丙酮、乙醚和乙酸乙酯提取物。

Is now an annual production capacity of calcium chloride, bromide, DecaBDE, DBDPE three bromine phenol, Tetrabromobisphenol A, octabromodiphenyl ether, benzyl bromide, diphenyl ether, dibenzo ethane and other chemicals, 5,000 tons of bromine, hydrogen bromide by-product 5000 tons, the product export to Europe and Southeast Asia market, the company owns self import and export rights, and have passed the ISO9001: 2000 certification, is the most full-bromine chemical species, product quality, one of the best high-tech enterprises.

现已形成年产氯化钙，溴素，十溴二苯醚、十溴二苯乙烷、三溴苯酚、四溴双酚A、八溴醚、溴化苄、二苯醚，二苯乙烷等各类溴化学品5000吨，副产溴化氢5000吨，产品出口欧洲和东南亚市场，公司拥有自营进出口权，并已通过ISO9001：2000认证，是国内溴化学品种最全、产品质量最好的高新技术企业之一。

The coordination effect between lariat crown ether and lariat azacrown ether with alkali metal ions has been analyzed and compared according to the obtained parameters.

运用得到的量子化学计算参数，如前线轨道HOMO能级，LUMO能级等，对碳基臂式冠醚与氮基臂式冠醚与碱金属离子的配位能力进行了比较和分析，结果表明氮基臂式冠醚分子B对碱金属的配位能力要大于碳基臂式冠醚分子A。

Under the catalyst, the polymerization retarder, the including water medicinal preparation existence condition, the methylacrylic acid and the polyethylene glycol single methyl ether (400) direct esterification synthesis methylacrylic acid polyethylene glycol single methyl ether (400) ester, and the influence factors of the catalyst, polymerization retarder, including water medicinal preparation has mellowly carried on the comparison.

摘要在催化剂、阻聚剂、带水剂存在的条件下，由甲基丙烯酸与聚乙二醇单甲醚(400)直接酯化合成甲基丙烯酸聚乙二醇单甲醚(400)酯，并对酸醇比、催化剂、阻聚剂、带水剂等影响因素进行了比较。

The cardanol glycidyl ether and nonyl phenyl glycidyl ether were synthesized by using cardanol and nonyl phenol as raw material respectively. The products structure and the structure of CGE/E51 and NGE/E51 cured system were characterized by FT-IR.

以腰果酚、壬基酚为原料制备了环氧树脂活性稀释剂腰果酚基缩水甘油醚和壬基苯基缩水甘油醚，对其结构及其与E51共混体系的固化物结构进行了红外光谱表征。

Sodium fatty alcohlo ether sulfate, S-80, fatty alcohol-polyoxyethylene ether and S-60 resulted in slow photodecomposition of rotenone in aqueous solution revealing a photo-extinction effect, sodium dodecylberzenesulfonate, tween-60, hexadecyl trimethyl ammonium bromide and poyl vinyl pyrrolidone made the photolysis of rotenone in aqueous solution fast showing an obvious photosensitized effect.

室内条件下研究了鱼藤酮水溶液存在不同表面活性剂时，鱼藤酮的紫外光降解，结果表明：脂肪醇聚氧乙烯醚硫酸钠、司本－80、长链脂肪醇聚氧乙烯醚和司本－60对鱼藤酮在水溶液中的光解速率表现出显著的光猝灭降解效应；十二烷基苯磺酸钠、吐温－60、十六烷基三甲基溴化铵和聚乙烯吡咯烷酮对鱼藤酮在水溶液中的降解表现出一定程度的光敏化作用。

Apllied the data of QuickBird-2——the highest resolution remote sensing,and based on the theory and methodology of fractal geometry,we have quantitatively studied remote sensing lineations in Gaolong gold deposit of Guangxi.

采用Quick Brid-2高分辨率卫星遥感数据，通过分形几何学的盒计维数法，定量研究广西高龙金矿区遥感线性构造。

So, sometimes, to change the color can not be your food (referring to the above-mentioned crustacean) has been a sign of boiling over.

所以，有时，来改变颜色，不能你的食物一直是沸腾了的迹象。