查询词典 chemical

Topics discussed include ultrafast spectroscopic techniques; aspects of electron transfer reactions ranging from solvent effects; intermolecular and intramolecular systems, to dynamics at semiconductor surfaces; the dynamics of chemical systems using Raman spectroscopy; pericyclic photochemical rearrangements and photodissociation reactions; solvent--solute interaction dynamics; and chemical dynamics in clusters.

讨论的议题包括超快光谱技术，电子转移反应的溶剂效应等方面；分子间和分子系统，动力在半导体表面，使用的化学拉曼光谱系统动力学；周环重排和光化学解离反应；溶剂-溶质相互作用的动态以及在化学动力学组。

PVC is characterized by high physical properties and resistance to chemical attack by strong acids and other oxidizers, alkalis, salt solutions, some organic chemical solutions, and many other chemicals.

PVC具有很好的物理特性，和耐强酸和其它氧化剂、碱、盐溶液、一些有机化学溶液，以及其它许多化学物质腐蚀的特性。

Chemical nucleases are a new challenging field that is quickly developing in chemical biology.

化学核酸酶是当今化学尘物学中发展迅猛、富有挑战性的新领域之一。

Widely applies in the city life sewage, the textile printing, the galvanization, the papermaking, the leather, brews, the food processing, the coal washing, the petroleum chemical industry, chemistry, the metallurgy, the drugs manufacture, ceramic, the cement plant sludge, the mine sludge, the chemical fiber sludge, the refinery sludge, the iron and steel plant sludge, the carbide slag, the electronic sewage, the line lumber yard, the brewery sludge, the kleit, to settle bran, wine less, profession and so on textile active sludge sewage treatment sludge dewatering processing, is also suitable for the industrial production liquid-solid separation or the liquid leaching working procedure.

广泛应用于城市生活污水、纺织印染、电镀、造纸、皮革、酿造、食品加工、洗煤、石油化工、化学、冶金、制药、陶瓷、水泥厂污泥、矿山污泥、化纤污泥、炼油污泥、钢铁厂污泥、电石渣、电子污水、线路板厂、啤酒厂污泥、高岭土、淀粉渣、酒渣、纺织活性污泥等行业的废水处理污泥脱水处理，也适用于工业生产的固液分离或液体浸出工序。

VB theory and molecular orbital Theory are the two most influential quantum-mechanical theories of chemical structure and nature of the chemical bond nowadays.

VB理论和分子轨道理论是当今说明化学结构和化学键本质的最有影响的量子力学理论。

The quality meet or exceed traditional seamless steel tube products for heat exchange, low-, medium-pressure boiler, municipal pipelines (steam heating, fuel vapor transmission, etc.) as well as the chemical industry, power plants, chemical fertilizer, oil field and other fields.

质量完全达到或超过传统无缝钢管，产品适用于换热气、低、中压锅炉、市政输送管道以及化工、电厂、化肥、油田等领域。

According to a report in Battery Bimonthly, there is an annual market demand of 40,000—50,000 tons of hydrogen storage alloy powder in the world, and the annual demand of hydrogen storage alloy for common Ni-MH chemical battery in China is around 8,000 tons, however the annual output is less than 5,000 tons. At present, demands of hydrogen alloys for Ni-MH chemical batteries are increasing by over 30% in each year and there is still a big vacuum in the market.

据《电池快讯》报道：全世界每年约需贮氢合金粉40000—50000吨，我国普通镍氢电池用贮氢合金每年需求量约8000吨，国内实际年产量不足5000吨，镍氢电池用贮氢合金目前国内需求量每年以30%以上的速度递增，市场需求缺口很大。

Melting point 3410 ℃, boiling point 560 ℃, relative density of 1935, F the external electronic structure of 5d46s2, in the chemical reaction time is very easy to lose 1-6 electronic, but also can get 1-2 electronic, so oxidation number of 0,± 1,± 2, 3, 4 , 5 and 6, with 6 price of the most stable compounds, such as WO3 does not dissolve in water, the air will form in the tungsten trioxide thin protective layer of tungsten, tungsten with fluorine at room temperature, chemical combination, red hot when there is no moisture and Bromine iodide together, red hot when you can and water reaction WO3, at room temperature reaction of tungsten with aqua regia, but the hot concentrated hydrochloric acid and sulfuric acid can only be played with its weak response, but molten nitrate, nitrite, too Hydrogen peroxide, sulfur steam, steam and other phosphorus can play intense reaction, high temperature can not be carbon, boron and silicon reaction of binary compounds, widely used in industrial tungsten steel and tungsten carbide, pure tungsten filament is used to the system, and X-ray tube Tube heating components, semiconductor components can be prepared tungsten silicide, tungsten industrial production is white or black tungsten ore tungsten ore refining.

熔点3410℃，沸点560℃，相对密度1935，F外围电子结构为5d46s2，在化学反应时很容易丢掉1—6个电子，也能得到1—2个电子，所以氧化数为0、±1、±2、＋3、＋4、＋5和＋6，以＋6价化合物最稳定，如WO3不溶于水，空气中的钨会形成薄层三氧化钨保护层，钨能与氟在室温下化合，红热并无潮气时能与溴、碘化合，红热时还能和水反应生成WO3，室温下钨可与王水反应，但热的浓盐酸和硫酸只能与其起微弱反应，但对熔融的硝酸盐、亚硝酸盐、过氧化氢、硫蒸汽、磷蒸汽等能起激烈反应，高温下不能与碳、硼和硅反应生成二元化合物，工业上广泛使用钨钢和碳化钨，纯钨用来制灯丝、电子管和X射线管的发热元件，硅化钨可制半导体元件，钨工业生产是将白钨矿石或黑钨矿石精炼。

Chemical process flow simulation technique is a powerful tool for chemical engineer to design new unit, to analyze the performance and to improve the operation of the existing unit.

化工过程流程模拟技术是化工工程师设计新装置和分析现有装置性能、改进现有装置操作的有力工具。

Nylon-6 is one kind of pioneer engineering plastic, which has been widely applied to machine tool、auto car、mechanism、weave、traffic and chemical industry, because of it is able to bear oil、friction、shake and chemical medicine and has high strength、heat stability, etc.

尼龙-6是工程塑料中开发最早的品种，由于其耐油性、耐磨性、抗震性、耐化学药品性、高强度、热稳定性等优点，已经被广泛应用于机床、汽车、机械、化工、纺织、交通运输等工业部门。

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。