以6-羟基-2-吡啶羧酸为原料,经5步反应合成得到一种新型四齿β-二酮1,2-羟基吡啶酮衍生物。通过红外、核磁、质谱对其结构进行了表......

该文结合中西史料勾稽Hopo一词源流,认为Hopo一词系“户部”之对音,而非学界普遍认为的“河泊”二字。同时考订了澳门关部行台设立......

Actinium such as Plutonium has become an important element with the wide applications of plutonium to military and nucle......