查询词典 ethylene

Two dinuclear metallocenes with biphenyl bridge were synthesized. and their catalytic properties for the polymerization of ethylene were investigated.

3对于具有超高活性的混合双茂化合物，我们用联苯桥连合成了其类似的双核茂金属化合物。

It's helpful for the diagnosis of Boerhaave's syndrome to make a thoracentesis after taking ethylene blue or take radiography after iodine preparation.

增强对本病的认识，详细采集病史及查体，口服美兰后胸穿及碘剂造影或胃镜检查有助于减少误诊和诊断。

Xinjiang once for 20 million tons refinery project, Tuoketuo 2,400,000 kilowatts power plant, one million tons Taigang Stainless engineering, Bayi Iron and Steel Works 900,000 tons of stainless steel projects, Qinghai Salt Lake one million tons of potash fertilizer project, Xinjiang Zepu 30 million tons of large chemical fertilizer, petrochemical Uzbekistan 300,000 tons of urea project, Dushanzi 1.2 million tons ethylene project, the Taklimakan oil and gas field projects, three billion yuan Taisu KUNSHAN large electronics factory building, Lianyungang nuclear power plant project, Yunnan Yuxi Cigarette Factory expansion project, the western port of the United States trailer with H-shaped steel, Tibet Lhasa airport, Zhao offshore drilling platform, the new century, Jiangsu 300000 tons dock, Bangladesh flood control projects, Dongfang Boiler Factory, Ningbo Jianlong Iron and Steel Company, Nanjing Metro, Shanghai Municipal Engineering projects such as the supply of a large number of high-quality H-shaped steel, steel sheet pile and the hot coil.

曾经为新疆2000万吨炼油工程、托克托240万千瓦电厂、太钢不锈100万吨工程、八一钢厂90万吨不锈钢工程项目、青海盐湖钾肥100万吨项目、新疆泽普30万吨大化肥、乌石化30万吨尿素工程、独山子120万吨乙烯工程、塔克拉玛干油气田工程、台塑昆山30亿人民币大型电子工厂建设、连云港核电站工程、云南玉溪卷烟厂扩建工程、美国西部港口拖车用H型钢、西藏拉萨机场、赵东海洋钻井平台、江苏新世纪30万吨船坞、孟加拉国防洪工程、东方锅炉厂、宁波建龙钢铁公司、南京地铁、上海市政工程等项目供应大量优质H型钢、钢板桩和热卷板。

According to this construction, ethylene is predicted to have an H-C-H bond angle of 120°, the measured angle of 117.5°being reasonably close to this value.

按照这种结构，预计乙烯的键角为120°，测得的键角是117.5°，相当接近与该值。

The main contents are:(1) The polarized laser Raman spectra of acetone, methyl alcohol, alcohol, ethylene glycol, formamide, acetonitrile, acetic acid, Chloroform, Methylene chloride, and Bromoform are measured in the experiment.(2) The depolarization ratio of Raman shift in the measured spectrum are

主要的结果有：得到了丙酮分子9条喇曼谱线、甲醇分子5条喇曼谱线、乙醇分子9条喇曼谱线、乙二醇分子7条喇曼谱线、甲酰胺分子8条喇曼谱线、乙腈分子8条喇曼谱线、乙酸分子8条喇曼谱线

Etherification of butanol with ethylene oxide by a new style solide acid catalyst is investigated.

研究了丁醇和环氧乙烷在一种新型固体酸催化剂上的醚化反应。

The Company perennial supply of various types of chemical raw materials: acetone, butanone, cyclohexanone, n-butanol, ethylene glycol, propylene glycol, ethanol and so on.

本公司常年供应各类化工原料：丙酮，丁酮，环己酮，正丁醇，乙二醇，丙二醇，乙醇等。

Many of the raw materials used in the petrochemical industry are unsaturated hydrocarbons, such as ethylene, propylene, butene and butadiene.

在石油化学工业中所用的许多原料是不饱和烃类，如乙烯、丙烯、丁烯和丁二烯。

Approximately 50% of mixed C_4 hydrocarbons produced during FCC process is butene,which is a good feedstock to produce ethylene and propylene,especially propylene.

催化裂化过程中生产的混合碳4(简称为C4)中含有50%左右的丁烯，是很好的制乙烯和丙烯，尤其是丙烯的原料。

The MTO process of alkene preparation,including ethylene,propylene,butene,by the synthesis of methanol from natural gas was discussed.

介绍了国内外天然气制烯烃技术发展概况，论述了以天然气为原料经合成甲醇进一步生产烯烃的 MTO工艺。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。