Nanopowder MnO 2 was prepared with two oxidation reduction methods.XRD,SEM,FT IR and surface area measurement techniques were used to investigate properties
A new method of prepation of 2,5 disubstituted 1,3,4 oxadiazoles from aromatic acids and hydrazine using microwave irradiation in the presence of PPA was des
Atom economy of the process of rare earth separation by using fluoride was discussed in this paper.We compared the atomic economic characters between the proces