The calculated results show that the aza Wittig reaction is a two step reaction, having one four membered ring intermediate on its reaction surface.
计算结果表明该反应是一个二步反应，在反应途径上存在一个四元环中间体。
The skin's protective reaction of constricting surface blood vessels is slower with age, and the cold-induced rise in metabolic rate is also weakened in older people, but the mechanism is unknown.
随着年龄的增长，皮肤的保护性反应——表层血管的收缩减慢，对低温的反应可以增加代谢率，可老年人的代谢率却在不断减弱，哪一代谢机体的下降却不明。
After two decades, 95 percent of the elemental mercury on the surface of a filling had gone through a chemical reaction. It became beta-mercury sulfide, a black-colored solid.
经过了20年的光阴，旧填充物表面有95%的汞元素已经发生了化学反应，它变成了黑辰砂(beta - mercury sulfide)，一种黑色的固体。
The reaction itself also takes place inside the nanotubes, which are hollow and have a large internal surface area thanks to their thin 20-nanometer-thick walls.
反应本身也在纳米管内部发生。这种中空的纳米管只有20纳米厚的薄壁，所以具有巨大的内表面积。
How will this affect the reaction of the water upon the surface it's hitting?
这将如何影响水滴击打水面的反应？
With increasing reaction time, the cross linking reaction proceeded from the surface to core gradually to give a gelatin material with cross-linking degree gradient across the section.
研究发现，随着交联时间的延长，交联反应从明胶材料的表面至内部逐步进行，由此可获得交联度呈梯度变化的明胶材料。
A qualified amphoteric ionic surface active agent is achieved in a lab through an organic synthetic reaction.
通过有机合成反应，在实验室制得符合条件的两性离子型表面活性剂。
Preparation of metallic ceramic coatings by thermochemical reaction method has the advantages of simple process, low cost, very strong adhesion of coatings to metal surface.
热化学反应法制备金属基陶瓷涂层具有工艺简单、成本低廉、涂层与金属表面结合力特强等优点。
Us scientists are trying to use the world's largest laser to set off a nuclear reaction so intense it will make a star bloom on the surface of the Earth, CNN reported.
据美国有线电视新闻网报道，美国科学家正在试验用全球最大激光器制造核反应，在地球表面造出一颗星星。
After one hour minimum, brush surface with sodium bicarbonate solution until all reaction ceases.
至少一小时后，在表面上刷碳酸氢钠溶液直到所有的反应都终止。
The pain and increased surface heat may be severe, and it is not rare to have some constitutional reaction if the involved area is large.
疼痛和表面灼热可能很重，如果累及的面积很大，也可出现全身反应。
This initial reaction or oxidation resists further chemical reaction on the metal surface.
初始的反应或氧化可以抵制材料表面再进行化学反应。
The main cause of discharge capacity decrease was the impedance of metal surface increased due to cell reaction.
电池反应所引起的负极金属表面阻抗的增加，是放电容量减小的主要原因。
The chemical properties of these surface differ considerably, particularly in their reaction to etchants.
这些不同的晶面，具有很不相同的化学性质，特别是对化学腐蚀剂的反应不一致。
This paper analyzes the influences of carbon, silicon and aluminium on the surface reaction when sintering austenite stainless steel powder.
研究了碳、硅和铝合金元素对水雾化奥氏体不锈钢粉末烧结时的表面反应的影响。
Influences of carbon, silicon and aluminium on the surface reaction of austenite stainless steel powder during sintering have been studied.
研究了碳、硅和铝合金元素对水雾化奥氏体不锈钢粉末烧结时的表面反应的影响。
The high temperature reaction centre above the burning surface of the double base propellants and its variety regulation are found.
实验发现了双基推进剂燃烧表面上方高温反应中心的存在和变化规律。
The impact of colloid and surface chemistry factors on the reaction is analyzed. Suggestions on process improvements are raised.
分析胶体与表面化学因素对反应的制约，提出了有待改进的工艺环节和改进方向。
The leaching process is controlled by mixed steps:the surface chemical reaction and the diffusion passing through the silicon and iron mineral phases.
浸出过程属于混合控制，即表面化学反应与通过不溶硅、铁矿物相的扩散为过程的控制步骤。
The surface reaction is performed in the grid simulation reactor.
而表面反应通过格子模拟反应器进行。
Surface chain transfer reaction was used to prepare end-grafted polymer films of nanometer dimensions.
研究了通过自由基链转移反应原位接枝聚合物膜。
The behavior of different species during the temperature programmed surface reaction (TPSR) of methane over various catalysts is traced by an on line mass spectrometer.
利用在线质谱分析检测了在各种催化剂上甲烷的程序升温表面反应(TPSR)过程中不同物种的行为。
However, once brought to the surface it has helped you to accept us without bringing about a fearful reaction.
然而，一旦它浮出水面你就会毫无恐惧的接受我们。
On the surface, her reaction is still very calm, however I detect that the silver green light rings have been perturbed and have small fluctuations, which contains the wonder and curiosity.
表面上看上去，她的反应仍十分平静，但我却探测到银绿色的光环受到了微扰，而且有了弱小的波动，其中蕴含着惊异和好奇。
The surface reaction of water atomized austenitic stainless steel powder during sintering has been studied.
研究了水雾化奥氏体不锈钢粉末在烧结时的表面反应。
This paper has studied the surface reaction of iron-based matrix materials during different temperature hot pressed.
本文研究了铁基金刚石胎体材料经不同温度热压时的表面反应。
The result showed that the procedure of acrylonitrile Synthesize via propane ammoxidation was the surface reaction of propane on the catalyst.
丙烷氨氧化制丙烯腈过程的控制步骤是丙烷在催化剂上的表面反应。
The kinetics of titanium deposition on AlN ceramic surface by heat disproportional reaction was studied.
利用融盐热歧化反应进行了氮化铝陶瓷表面钛金属化沉积的动力学研究。
The kinetics of titanium deposition on AlN ceramic surface by heat disproportional reaction was studied.
利用融盐热歧化反应进行了氮化铝陶瓷表面钛金属化沉积的动力学研究。
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