环烯

In order to further predict the durability of the TS-1 catalyst in the severe condition of calcination regeneration, a catalytic deactivation method was employed to facilitate the obtaining of deactivated catalyst from the regenerated sample, and thus the conduct of repetitious regenerations.

研究了负载成&蛋壳型&的TS-1催化剂在丙烯环氧化的单管放大试验装置上连续运转1 200 h失活后的焙烧法再生条件，并结合催速失活，对该催化剂进行了多次焙烧再生研究。

The dosage of aspirin,overdose of epoxidase 2,effect of arachidonic acid lypoxygenase metabolic pathway,multiplicity of glucoprotein Ⅱb/Ⅲa acceptor hypotype and activating route of other thromboplastid can cause aspirin resistance,this article reviews the mechanism of aspirin resistance.

阿司匹林服用剂量、环氧化酶2过量表达、花生四烯酸脂氧化酶代谢途径的作用、糖蛋白Ⅱb/Ⅲa 受体亚型多样性及其他血小板活化途径的可能作用均可能引起阿司匹林抵抗，本文就阿司匹林抵抗机制进行综述。

A number of synthetic methods of ferrocene are known.

二茂铁的合成方法很多，一般都是用绿化亚铁和环戊二烯的盐在碱的作用下得到的。

A number of synthetic methods of ferrocene are known.

二茂铁的合成方法很多，一般都是用绿化亚铁和环戊二烯

Employing CuI(5 mol%), N,N-dimethylglycine hydrochloride(10 mol%) and K_2CO_3(2 equiv.) in refluxing THF as the optimized reaction conditions,the four-membered 4-alkylidene-2-azatidinones could be efficiently synthesized.

当以3-溴-3-N-苯基-丁烯酰胺为底物，在5 mol%CuI为催化剂，10 mol%N，N-二甲基甘氨酸盐酸盐为配体，2当量K_2CO_3作碱，THF回流的反应条件下，可以高效的合成2-亚甲基-4-氮杂环丁酮类化合物。

Crossover network divide frequencies out to each specific loudspeaker component,proper phasing and precision frequency rolloff allow each loudspeaker to perform at it best.

独特的聚炳烯低音盆配抗紫外线丁基橡胶复合折环，提供持久稳定的弹性刚力，保证各种恶劣环境下音盆稳定的线性位移，赋予音盆极为优异的频率响应。

The activity of benzene hydrogenation decreased with an increase of the Zn content.

苯的氢化反应活性随锌的含量增加而降低，但环己烯的选择率与产率随锌的含量增加而增加。

These are stored on a per-band basis i.e. 160 M, 75 M, 40 M, 30 M, 20 M, 17 M, 15 M, 12 M, 10 M, 6 M, FM-BCB, Air, 2 M, and UHF.

这些存储在每个波段的基础上（即160米，75米，40米，30米，20男，17女，15男，12女，10米，6米，调频环丁烯，空气，2米，和超高频。

Single component and multi\|component of iron system colloidal catalyst \Ali\|Bu\-3CH\-2CHCH\-2Cl\ were mixed by different ratios in hydrogenated gasoline medium at 25℃.This paper studied the relationship between the nonaqueous systematic electroconductivity and the concentration of catalyst components.In combination with Tyndall effect,polymerization experimental results,Ali\|Bu\-3 existed in associated state and dissociated into ionpair.The reaction between Ali\|Bu\-3 and Fenaph\-2 was the main reaction which formed colloidal core.Ali\|Bu\-3 reacted on CH\-2CHCH\-2Cl and Ali\|Bu\-2Cl was yielded which joined the formation of active center on the surface of colloidal core.The excessive Ali\|Bu\-3 was dissociated into ionpair which formed double electrode layer,and the double electrode layer kept the colloidal particles relatively stable.

研究了在25℃加氢汽油介质中，铁系胶体催化剂［Fenaph2Ali-Bu3―CH2==CHCH2Cl］单组分、多组分按不同配比混合，非水体系电导率与浓度的关系，结合Tyndall效应，聚合实验结果，得出Ali-Bu3以缔合状态存在并解离成离子对它同环烷酸亚铁的作用是形成胶核的主要反应，与氯丙烯反应生成的氯化异丁基铝，在胶核表面参与形成活性中心由过量Ali-Bu3解离的离子对形成的双电层结构，使胶粒保持相对稳定。

In the synthetic reaction process dicyclopentadiene is a terminal group sealing agent,and there is no Diels-Alder addition reaction taking place.

在合成反应过程中二聚环戊二烯是端基封闭剂，无Diels-Alder加成反应发生。

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。