The luminophors MeO-SiO<sub>2</sub>:Eu<sup>3+</sup>,Bi<sup>3+</sup>and MeO-SiO<sub>2</sub>Bi<sup>3+</sup>(Me=Mg.Sr)were synthesized at relativelylower temperature
The electronic modification effect of various metal oxides over Pt-Al<sub>2</sub>O<sub>3</sub> catalyst andthe relationships between the polarizing force of cat
By the condensation of tryptamine with appropriate substituted benzalde-hyde followed by Pictet-Spengler reaction,a series of 1-aryl-tetrahydro-β-carbo-lines(T