The transition metals (Cu, Co, and Fe) were applied to modify Ni/Ce0.2Zr0.1Al0.7Oδ catalyst.The effects of transition metals on the catalytic properties of Ni/
The alkylation of toluene with methanol to selective formation of p-xylene has been systematically studied. ZSM-12 (MTW)/ZSM-5 co-crystalline zeolite in 40:60 p
患者男,79岁.因"发作性头晕、胸闷7年"于2010年7月1日入院.既往有高血压、高脂血症、脑栓塞病史,有"低分子右旋糖酐"过敏史.体格检查:体温37.7℃,脉搏80次/min,呼吸18次/min,血压130/75 mm Hg(1 mm Hg=0.133 kPa).心电图示完全性右束支传导阻滞、ST-T改变、Ⅰ度房室传导阻滞、频发室性早搏.诊断为冠状动脉粥样硬化性心脏病(冠心病)、永久性心脏起搏器