为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

A new series of isatin semicarbazide derivatives(7a-7j) were synthesized and characterized by spectroscopic means and el......

A new series of isatin semicarbazide derivatives (7a-7j) were synthesized and characterized by spectroscopic means and e......