supported by the National Natural Science Foundation of China (U1162114,U1362110);the Program for New Century Excellent Talents in University (NCET-070142)
PNP-type ligands showed very good property in the catalytic systems of PNP/Cr(Ⅲ)/methylaluminoxane(MAO)for ethylene selective tetramerization toward1-octene.In this research,two PNP analogues bis(diphenylphosphino)ph...
51单片机是对所有兼容Intel 8031指令系统的单片机的统称,是一种带闪烁可编程可擦除只读存储器(FPEROM—Falsh Programmable and Erasable Read Only Memory)的低电压,高性能CMOS8位微处理器。其代表型号是ATMEL公司的AT89系列,它广泛...