二氧戊环

The polyvinyl chloride static and dynamic experiments of the heat stability by three novel low-lead, non-lead and low-tin, and non-lead and non-tin thermal stabilizers remixed respectively with phosphite ester, epoxidized soybean oil,β-diketone, pentaerythritol and houghite were reviewed.

通过新型低铅、无铅低锡和无铅无锡热稳定剂分别与亚磷酸酯、环氧大豆油、β-二酮、季戊四醇和水滑石进行复配，进行了聚氯乙烯的静态和动态热稳定性实验。

One of these compounds, 2-diethyl- aminoethyl-5--(4-methoxybenzylidene) cyclo- pentanone hydrochloride (T81) possessed sig- nificant antiinflammatory and analgesic ac- tivity when administered orally.

Ⅲ类化合物完全无抗癌活性，对其中一个化合物2-二乙胺乙基-5--（4-甲氧基苯亚甲基）环戊酮盐酸盐（T81）试验结果表明，它经口给药时具有显著的抗炎、镇痛活性。

The properties of single chain and pauci chain polystyrene microspheres and recent results on the electron microscopy and selected area electron diffraction of single chain monocrystals of polyethylene oxide, isotactic polystyrene, cis1,4 polybutadiene and gutta percha are presented and discussed.

介绍和讨论了单链和寡链聚苯乙烯玻璃体微球的性质以及聚环氧乙烷、同立构聚苯乙烯、－，4－丁二稀、－，4－异戊二烯单链单晶电子显微镜和选区电子衍射观察的最新结果。

RESULTS Twelve hours were spent in the sterilization to the undurable orthopedic instruments when the ethylene oxide was used, and 10h were needed using the 2%GTA.

结果 不耐热骨科手术器械采用环氧乙烷灭菌法进行消毒每次需要12h；戊二醛浸泡灭菌每次需要10h；低温过氧化氢等离子灭菌法消毒每次需要55rain。

ABSTRACT: In the presence of sodium t-butoxide and DMSO,ethyl 2-oxocyclopentanecarboxylate was subjected to C-alkylation with 2-(4-bromomethylphenyl)propanoic acid with high regioselectivity to give 2-［4-(1-ethoxycarbonyl-2-oxo-1-cyclopentanylmethyl)phenyl］propanoic acid (4) which was followed by hydrolysis,decarboxylation and salt formation to afford loxoprofen sodium in about 72% overall yield.

在叔丁醇钠和二甲基亚砜的存在下，2-丙酸对2-乙氧羰基环戊酮进行C-烷基化，再经水解脱羧，成盐即得洛索洛芬钠，以2-丙酸计算，总收率为72%。

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。