promethium

常见例句

My father found that promethium orb 20 years ago...
我父亲在20年前找到的这颗珠子...
The heat stabilities and transparencies of stearates of rare earth metals except scandium and promethium used as heat stabilizers as PVC were studied.
研究了钪、钷外其他稀土金属硬脂酸皂对PVC热稳定作用。结果表明:它们均属长期型热稳定剂,与少量硬脂酸锌并用可有效改善其抑制PVC初期着色的效能;
The discovery of prometheum is presented in detail and emphasis is put on the important role of the ion exchange method in separating and identifying promethium.
本文详细及正确地介绍了放射性元素钷的发现史,特别强调了离子交换技术在钷的分离及鉴定中的重要作用。
Keywords promethium;aquatic ecosystem;dynamics.;
钷;水域生态系;动力学;
radioactive isotope of promethium
147钷, 149钷, 151钷
promethium addition
钷添加合金