Measurement and thermodynamic modeling of Np(V) solubility in aqueous K2CO3 solutions to high concentrations

The solubility of Np(V) solids was studied in 0.01 to 6.38 mol-Kg^-1 ₂CO₃ solutions. Two series of experiments were conducted from undersaturation using NpO₂OH(s) or KNpO₂CO₃(s) as the starting solid. The Np(V) solid phases observed at steady state are KNpO₂CO₃(s) and K₃NpO₂(CO₃)₂(s). The activity coefficient formalism of Pitzer was used to obtain a thermodynamic interpretation of these data, including the solubility constants: To model these data, we propose values for several binary and ternary ion interaction parameters among the carbonate ion, potassium ion, and the neptunyl triscarbonato ion. With these new parameters, the thermodynamic data base for Np(V) solubility in concentrated aqueous solutions has been extended to the NaK-C1-C1O₄-CO₃-H-OH-H₂O system.     

谈谈量子力学中的状态叠加原理

以对话的形式,介绍并评论了布洛欣采夫、狄拉克以及朗道和栗弗席茨关于状态叠加原理的不同表述.     

医药类专业物理课程教学存在的问题及对策

根据对国内69所普通高等院校医药类专业（本科）物理课程教学现状调查的结果,分析了在我国高等教育进入“大众化教育”的形势下,医药类专业物理课程教学中存在的4个急需解决的问题,指出了医药类专业物理课程教学改革的方向,并介绍了我们所做的一些工作。