With growing awareness of environmental protection and promulgated legislation for controlling the exhaust gas(SOx and N......

Main observation and conclusionrnTransition metal-rare earth oxide catalysts had the ability to catalyze ammonia decompo......

目的：探讨人工破膜对产程的影响。方法：本文采用回顾性研究方法对１９９７年１月至１９９９年１２月间我院住院经阴道分娩的２８９例产妇，按活跃期人工破膜时机的不......

对二乙苯制二乙烯苯的铁基催化剂进行了活性评价，并用ＸＲＤ，ＸＰＳ等分析手段对催化剂的相结构各组分间的相互作用与催化活性的关系，进行了研究。......