摘要
通过 X射线粉末衍射和透射电镜研究了在青霉素酰化酶 ( PGA)作用下双金属复合氧化物 ( LDO)记忆效应与其组成 (层板电荷密度、层板离子种类 )的关系 .结果表明 ,5 0 0℃焙烧水滑石得到的 LDO,其结构由前体的有序层状结构成为层板的无序堆积 .随层板碱性降低 ,酶对 LDO作用明显 ,LDO保持其无序层板堆积 ;随层板碱性增加 ,酶对 LDO作用减小 ,LDO的记忆效应明显 。
Layered double oxide(LDO) immobilized penicillin G acylase(PGA) has been studied by XRD and TEM. The results show that the LDO, obtained by calcination at 500 ℃ of layered double hydroxides(LDH) having an ordered layered structure, has a disordered layered structure. PGA has an obvious effect on the LDO when the basity of LDO decreased, vice versa . The memory effect of LDO is due to transition of its disordered layered structure into ordered layered structure.
出处
《应用化学》
CAS
CSCD
北大核心
2001年第11期853-856,共4页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金资助项目 ( 2 99730 0 4)
