A NaA zeolite membrane was synthesized on the surface of the stainless steel slab. The membrane was characterized by XRD and SEM. The membrane was continuous
By using the chemical bond theory of diclectric description, the chemical bound parameters of (Tl,Pb)-1223 was calculated. The results show that the Sr-O,Tl-O,a
A series of pyrazolo[3,4-d]pyrimidin-4-one derivatives were synthesized and tested for vasodilatory activities. All of them were new compounds and their structu