Catalytic hydrogenation of diacetyl monoxime to tetramethylpyrazine, by the homogeneous catalysts generated in situ from some transition metal chlorides with tr
The synthesis of a new aryl ether ketone polymer with an advantageous ratio of glass transition temperature to melting temperature is reported.
The synthesis o
The structural effects on the defective formation and the crystal mor-phology in the crystal of urea have been studied. The face development is discussedfrom th