查询词典 chemical

DMC is a green chemical industry product which rapidly developed in the recent years, it can substitute for the organic chemical basic raw material such as the bigger toxic carbonyl chloride, methyl chloride, methyl chloroformate and so on, it is vital significance to the environmental protection.

碳酸二甲酯是近年来迅速发展起来的环境调和型绿色化工产品，它是可用于替代毒性较大的光气、氯甲烷、氯甲酸甲酯等物质的有机化工基本原料，对于环境保护具有重要意义。

Jiangmen City, Czech Run Chemical Trading Co., Ltd. operating chemical raw materials, mainly toluene, xylene, a rough, crude dimethyl, mixed aromatics, mesitylene, crude Sanjia, mixed dimethoxy, methylal, n-butyl, B ester, n-butyl alcohol, isobutyl alcohol, vinyl acetate, styrene, butyl ether, cyclohexanone, 6 #, 120 #, 200 #, titanium dioxide, phthalic anhydride, DOP, isopropanol for Main Product, Quality Assurance , the price advantage of abundant supply.

江门市捷润化工贸易有限公司经营化工原料，主要为甲苯、二甲苯、粗甲、粗二甲、混合芳烃、三甲苯、粗三甲、混二甲、甲缩醛、正丁酯、乙酯、正丁醇、异丁醇、醋酸乙烯、苯乙烯、丁醚、环己酮、6#、120#、200#、钛白粉、苯酐、DOP、异丙醇为主营产品，质量保证，价格优势，货源充足。

This thesis deals with the investigation on the chemical constituents of Dioscorea Opposite Thunb and studys the interactions between 5,7-dihydroxy-4′-methoxy flavanone,-epicatechin and bovine serum albumin using fluorescence, electrochemical method ,UV absorption and NMR spectroscopy. The main contents are as follows: Chapter 1: Study of the chemical constituents in Dioscorea opposita Thunb 1. Two methods were used to methylate the fatty acid in Dioscorea opposita Thunb.

本文在前人的工作基础上对我省道地药材-怀山药饮片中的化学成分进行了系统的研究；同时利用核磁共振方法、电化学分析法、荧光光谱法、紫外光谱法分别研究了两种天然酚性化合物5，7-二羟基-4′-甲氧基二氢黄酮，(--表儿茶素与牛血清白蛋白之间的相互作用，主要内容如下：一。

The paper studies the chemical and mineralogical compositions, the technological and physical properties of tripoli by means of chemical analysis.

借助于化学分析、X射线衍射分析、工艺性能试验等方法，对粉石英的化学成分、矿物成分、工艺物理性质进行了研究。

You can get physics datebase of chemical through searching via registration number,molecular formula,chemical name

你可以通过CAS登记号，分子式，化学名称进行相关，来获取这些化学品的相关物理数据。

The majority of them are produced by fermentation using microorganisms of different species identified as species belonging to Aspergillus, Monascus, Nocardia, Amycolatopsis, Mucor or Penicillium genus, and some are obtained by treating the fermentation products using the methods of chemical synthesis or they are the products of total chemical synthesis.

它们主要是用属于曲霉属，红曲霉属，诺卡菌属，Amycolatopsis，毛霉属或青霉属的不同物种的微生物通过发酵而生产的。有一些是用化学合成方法处理发酵产物而获得的或者有一些是全部化学合成的产物。

Familiar with petrochemical,chemical and fertilizer engineering or the knowledge of chemical equipment,welding or NDE.

熟悉石化、化学、化肥等工程或化工设备、焊接、探伤等方面知识

She assumptions Road: Emilio segre should have found the first transuranic element neptunium, if he is not a lack of adequate knowledge of chemical and rare earth elements to make mistakes to 23,993 words; Similarly, Enrico Fermi should have been found in fission, if his team The chemical separation technology is not quite so appropriate.

她假设道：Emilio segre本应当发现第一个超铀元素镎，如果他不是缺少足够的化学知识而把23993错认作稀土元素的话；与此相似，Enrico Fermi本应该发现裂变，如果他的研究小组的化学分离技术不是这样不甚适当的话。

Nitrogenous heterocyclic compounds, which has a good deal of chemical reactions and chemical structures, are very important in the field of application, medicine, biology, medicine, pesticides, and other fields.

含氮杂环是一类具有重要应用价值和良好生物活性的化合物，它们不仅具有丰富的反应化学和结构化学，并且在生物、医药、农药等领域具有重要的应用价值。

Jie Sheng chemical into the liquid is mainly sulfur-burning sulfuric acid, potassium sulfate, chlorosulfonic acid, liquid sulfur dioxide, sulfur trioxide, nitrosyl sulfuric acid, as well as cogeneration for steam systems, a variety of products amounted to more than 20 years of logistics million tons, capacity 16 million KWH, steam 140,000 tons; a lot of sulfur in addition to the downstream products in the study of chemical development.

捷盛化学目前主要建成液体硫磺制酸、硫酸钾、氯磺酸、液体二氧化硫，三氧化硫、硫酸亚硝酰项目以及余热发电、供汽系统，各类产品年物流量达20余万吨、发电量1600万KWH、蒸汽14万吨；另外还有诸多硫化工下游产品在研究开发之中。

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。