查询词典 petroleum

College of Chemical Engineering,China University of Petroleum,Beijing 102200,China

中国石油大学化学科学与工程学院，北京102249

Objective To investigate the chemical constituents of the petroleum and the chloroform extracts of Ledum palustre L.

目的对细叶杜香石油醚和三氯甲烷部位的化学成分进行研究。

Chloropicrin in vegetables and fruits was determined by gas chromatography with ECD after extracted with petroleum ether under ultrasonic.

采用石油醚对蔬菜、水果样品进行超声波提取，以气相色谱电子捕获检测器测定氯化苦残留。

Also the molecular structure and functional effects of this active component were studied in detail. 1 Extraction, separation, purification and structural identification of the functional component in Chufa After initial handling of waste slurry to solid powder, ethanol was used to lixiviate it followed by the extraction with petroleum ether,ethyl acetate,n-butyl alcohol one by one, the polarity of three organic reagents being changed from low to high.

荸荠功能因子的提取、分离、纯化及结构鉴定以马蹄粉厂产粉废浆为原料，经过实验室初处理成固态原料粉后，用乙醇浸提，再将浸提物以水悬浮，依次通过极性从小到大的石油醚、乙酸乙酯、正丁醇三种有机溶剂两相萃取分部，并以金黄葡萄球菌、枯草芽孢杆菌和致病大肠杆菌为指示菌，检测上述各部分提取物的功能效果。

In view of economy development,at present the petroleum mining in Daqing Cit...

可见，无论在经济意义上，还是在生态意义上，大庆市的可持续发展都成为一个无法回避的重大现实问题。

And the Tertiary clastic and carbonate rocks are the reservoir of petroleum system.

以第三系碎屑岩、碳酸盐岩为储集层的油气体系。

Migration behaviors of petroleum in clastic carriers seem to be inhomogeneous.

油气在以连通孔隙为流体储、流空间的碎屑岩输导层中的运移具明显的非均一性。

Current estimates are that global methane clathrate deposits contain roughly 20,000 trillion cubic meters of methane, which is twice the amount of all known sources of coal, petroleum, natural gas, and so on.

目前估计全球可燃冰所含的甲烷量约有2万兆立方公尺，大约为目前已知所有煤、石油、天然气等传统化石燃料的2倍。

In yesterday's stock along with most of the time, watched the final half-hour stock is about to go soft, but I do not know where all of a sudden out "mystery funds", is to stare blankly Unicom and China National Petroleum Corporation which carried the two elephants go, the potential recovery of large-scale speculators Reached, the stock closed at the end red disk.

在昨天的股票的计划，大部分时间一直观看了最后半小时的股票即将走软，但我不知道，突然出"神秘资金"，愣是联通和中国石油天然气公司，该公司带的两个大象离开，大型投机者可能达成的恢复，该股最终收于红盘。

The separation and purification processes of 2,6-DMN from coal and petroleum tar are reviewed.

文摘：本文介绍了2，6-二甲基萘的用途和制备方法；综述了从煤焦油和石油中分离提纯2，6-二甲基萘工艺。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。