查询词典 sparteine

A similar initiator, Et_2Zn/-Sparteine, yielded polys with threo-diisotactic -rich structure in the main chain, indicative of strongly asymmetric inducation in this system. In this case, no polymeric complexes in-site formed because of the intensive coordination between sparteine and Zn ions.The binary initiating system composed of Et_2Zn and n-BuLi combined the advantages of both metal alkyls, which gave the polymers with higher molecular weights and moderate optical activity ~(25_D =-97.1°～+24.3°.

Et_2Zn／n-BuLi二元引发体系综合了两种金属烷基化物的优点，得到了分子量相对较高(M_n=1.4x10~3～4.9×10~3)且含有手性超分子结构的光学活性聚合物；聚合物中锌含量的微小变化可引起聚合物光学活性明显改变，超分子手性与聚合物侧基的绝对构型存在关联。

The polymerization characteristics have been examined in detail for the oxazoline-substituted N-phenylmaleimides with initiators including n-BuLi, Et_2Zn, Et_2Zn/-Sparteine, and Et_2Zn/n-BuLi.

发现：在n-BuLi引发下获得的光学活性聚合物最高比旋光度达到-60.0°~(25D，数均分子量为2×10~3～6×10~3；聚合物的比旋光度随着分子量的增大而线性增加，poly出现了旋光方向翻转现象，临界分子量为M_n=2700。

Result: Eight compounds were isolated and identified as matrine,sophoridine,sophocarpine,sophoramine,oxymatrine,oxysophocarpine,aloperine and sparteine.

结果：分离鉴定出8个化合物：苦参碱、槐定碱(sophoridine，Ⅱ)、槐果碱(sophocarpine，Ⅲ)、槐胺碱(sophoramine，Ⅳ)、氧化苦参碱(oxymatrine，Ⅴ)、氧化槐果碱(oxysophocarpine，Ⅵ)、苦豆碱(aloperine，Ⅶ)和鹰爪豆碱(sparteine，Ⅷ)。

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。