丁烷

For the isobutane, the detail information of the total energy, dipole momentum, orbital energy, and momentum distribution were obtained by carrying out theoretical calculation and experimental data analysis.

通过对异丁烷分子的理论计算和实验数据分析，获得了该分子基态总能、偶极矩、各价轨道的束缚能、以及各价轨道的电子动量谱等详细信息，理论计算与实验结果符合很好。

Propylene is one of the important chemical industry material , a half of its produce outputs are used to make chemical industry products in America , then the reaction's product between the rest and isobutane is alkane chemical compound demanded in petroleum .

丙烯是重要的化工原料，美国将生产量的二分之一用于制造化工产品，余下的大部分则与异丁烷反应制造汽油中所需要的烷化物。

The present invention relates to a novel application of CrOx/SBA-15 as a catalyst for oxidative dehydrogenation of isobutane to isobutene.

本发明涉及CrO x /SBA-15作为异丁烷氧化脱氢制备异丁烯催化剂的新用途。

The results show that mesoporous and hollow SnO2 gas sensor has higher sensitivity and nice response-recovery characteristic to alcohol, hydrogen, but it has no sensitivity to carbon monoxide, isobutane, benzene and so on.

采用静态配气法对材料进行了气敏性能测试，结果表明：介孔和空心球氧化锡元件都对乙醇、H2表现出较高的灵敏度和良好的响应特性，而对CO、异丁烷、苯等不敏感。

Among the substances in third-hand smoke are hydrogen cyanide, used in chemical weapons; butane, which is used in lighter fluid; toluene, found in paint thinners; arsenic; lead; carbon monoxide; and even polonium-210, the highly radioactive carcinogen that was used to murder former Russian spy Alexander V.

三手烟中的物资包括用于制造化学武器的氢氰化物，轻质石油的丁烷，涂料稀释剂中的甲苯，砷，铅，一氧化碳，甚至还有谋杀了前苏联间谍亚历山大利维尼柯的极具放射性致癌物资钋210，三手烟中11种组成物质都是高致癌物资。

The influences of the reaction temperature,re- action time and mass rat...

研究了醚化反应的温度和时间及正溴丁烷(n-C_4H_9Br)与二乙二醇单甲醚的摩尔比对DGBME收率的影响，用气相色谱法分析了产物含量，并用FT-IR和~1H NMR表征了产物结构。

The first four members of the series (methane, ethane, propane, butane) are gases at ordinary temperatures; the next eleven are liquids, and form the main constituents of paraffin oil; the higher members are solids.

最前的四个烷烃化合物(甲烷、乙烷、丙烷、丁烷)在常温下为气体；接下来的十一个为液体，是构成石蜡油的主要物质；更高碳数的则为固体。

While erthrocyte, hemoglobin and Hela cell were under oxidative damage induced by the hydrogen peroxide (H2O2) or tert-butyl hydroperoxide on different concentrations of dihydromyricetin, hemolysis rate of erythrocyte and methemoglobin converted from hemoglobin was estimated by ultraviolet-visible absorption spectroscopy. Whereas mmalondialdehyde from erythrocyte was measured by thiobarbituric acid colorimetry, the cellular viability of Hela cell was examined using MTT 3-(4, 5-dimethylthiazol-2-yl-2, 5-diphenyl tetrazolium bromide assay.

在不同的二氢杨梅素浓度下，用过氧化氢或过氧化特丁烷对红细胞、血红蛋白和Hela细胞进行氧化伤害，以紫外－可见光分光光度法检测红细胞溶血率和由正常血红蛋白生成的高铁血红蛋白，硫代巴比妥酸法测定红细胞中的丙二醛，MTT法检测Hela细胞的活力。

The synthesis path of 2-phosphono-butane-1,2,4-tricarboxylic acid is studied by using alkyl phosphate,butendioic acid dialklesters and methyl acrylate with the catalyst of sodium methylate.

论文摘要本文以亚磷酸二甲酯，顺丁烯二酸二甲酯，丙烯酸甲酯为原料，甲醇钠为催化剂，合成了 2-膦酸丁烷-1，2，4-三羧酸并对中间物及产物进行了 IR、13C，31P 核磁，MS 表征。

Under low temperature, n-butane isomerization on SO_4~2-/ZrO_2 and Cs_xH_(3-x)PW_(12)O_(40) catalyst proceeds through a monomolecular pathway in the initial stage of the reaction.

利用原位固体核磁共振技术可定量分析的优点，详细研究了上述三种酸催化剂上的正丁烷异构化反应动力学。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。