查询词典 Oxygen

A photoelectron beam with sensitivity of 8 μA/mW and polarization of above % is obtained on the NEA GaAs (00) surface in the activation with caesium and oxygen.

在用此法激活的NEA GaAs(00)表面上可得到灵敏度为8μA/mW，极化度约用%以上的光电子束。

The result shows that the main factors,which affect the technical quality of the cathode assembly preparation,are surface oxidization of emissive layer,impurity pollution,doped concentration nonuniform,less variation of doped concentration gradient,the sticking stress of GaAs and glass,and the main factors,which affect the cathode activation,are the degree of vacuum for activation at lower than 8x10-8Pa,the partial pressure of H2O,CO,CO2 and C in the vacuum residial gas at higher than 10-8 Pa and the improper caesium and oxygen refining.

结果表明，影响台外工艺质量的主要因素是外延材料缺陷多、发射层表面氧化、杂质污染、掺杂浓度不均匀、掺杂浓度陡度变化小及GaAs与玻璃粘接产生的应力大；影响台内工艺质量的主要因素为阴极激活真空度低于8×10-8Pa。真空残气H2O.CO.CO2及C分压大于10-8Pa。阴极激活铯和氧源提纯不彻底。

Chemical treatment in calcium nitrate solution and oxygen plasma treatment are used to modify mulberry silk in the thesis. The morphology, structure and mechanical properties of the silk fiber treated by the above two methods are studied.

基于这一目的，本论文研究了Ca(NO_3)_2化学改性法和低温氧等离子体处理法两种改性作用下的真丝纤维的形态、结构和力学性能等特征。

The working conditions of equipments, the mediums and their concentrations, and the interference of coexisting ions were investigated. The results showed that when the flame was shielded with oxygen enriched, the barium in lapis lazuli could be determined using calcium nitrate as releasing agent in 5% nitric acid. The obtained results were satisfied.

对仪器的工作条件、介质及其浓度、共存离子的干扰进行了探索，结果表明，在富氧屏蔽火焰条件下、体积分数为5%硝酸介质中，以硝酸钙作释放剂，测定天青石中的钡，可获得满意结果。

The Calcium Oxide is used to mix oxygen with the molten steel.

这些生石灰是用来将氧混合在熔化的钢水中。

To pretreatment human hair samples by burning oxygen bottles, with a total strength as absorbent, and then use of fluoride ion electrode as directed electrode, and saturated calomel electrode as the reference electrode. To determine with improved Gran's Drawing with a satisfactory result.

用氧瓶燃烧法预处理人发样品，以总离子强度剂兼作吸收剂，然后直接用氟离子选择电极作指示电极，饱和甘汞电极作参比电极，用改进Gran's作图法进行测定，结果满意。

The calorific value of fuel is primarily determined by the mass fraction of elements such as carbon, hydrogen and oxygen.

燃料的热值主要取决于燃料中C、H、O等元素的质量分数。

Besides, with the help of invariable temperature calorimeter, ignition character of coal with excessive oxygen is studied.

此外，借助于恒温式氧弹仪对煤在过氧条件下的着火性质进行了研究。

In the case of the phlogiston theory, Lavoisier proposed to explain the loss in weight when the red calx turned back into mercury as due to the escape of oxygen (rather than to an absorption of phlogiston).

就燃素理论来说，拉瓦锡就提出解释过当红烧渣变回成水银的时候其重量损失是由于氧气的逃逸而引起的。

Main products of this company are:single-use vein needle,anaesthetic puncture bag,infusion pump,puncture bag for thorax,canula for trachea,trachea cut cannula,sputum aspirator pipe,suction connection pipe,urethral catheterization bag,general anesthesia bag,dressing change bag,oxygen therapy pipe,etc.

公司主要产品有：一次性使用静脉留置针，麻醉穿刺包，输注泵，胸腔穿刺包，气管导管，气管切开插管，吸痰管，吸引管、连接管，导尿包，全麻包，换药盒，输氧管等。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐