Study on Electric Double Layer of a Cylindrical Particle with Functional Theoretical Approach

A new method, i.e. the iterative method in functional theory, was introduced to solve analytically the nonlinear Poisson-Boltzmann （PB） equation under general potential ψ condition for the electric double layer of a charged cylindrical colloid particle in a symmetrical electrolyte solution. The iterative solutions of ψ are expressed as functions of the distance from the axis of the particle with solution parameters： the concentration of ions c, the aggregation number of ions in a unit length m, the dielectric constant e, the system temperature T and so on. The relative errors show that generally only the first and the second iterative solutions can give accuracy higher than 97%. From the second iterative solution the radius and the surface potential of a cylinder have been defined and the corresponding values have been estimated with the solution parameters, Furthermore, the charge density, the activity coefficient of ions and the osmotic coefficient of solvent were also discussed,     

吖啶酯化学发光测量参数和睾酮抗体工作浓度的最佳化

10-甲基吖啶-9-羧酸[4-(N-睾酮-3-羧甲氧基肟)-氯乙基]苯酯(To-3-AEPMAC)发光测量的时间参数在低浓度区域测量十分重要.本文报道在0.00～0.21s间有一占发光总面积4.10±2.21%(x±s)的溶剂峰;峰发光的起始和终点在0.32～3.915间,峰时间参数位于0.43～2.22s间,反应速率分析也证实时间参数的实验结果.选择0.30s延迟时间和10s积分时间的化学发光积分参数测量既可排除溶剂发光的干扰,又可较精密地采集到T0-3AEPMAC的全部发光信号.而单位时间的发光峰高测量因随剂量增加峰时间参数延长不能满足建立超微量化学发光免疫化学分析测量的要求.本文根据化学发光免疫化学高灵敏和高精密的分析要求,通过抗体稀释曲线极值的优选、最大反应变化的标定和最小反应标准误点分析使睾酮抗体的工作浓度最佳化,即稀释度为1:18000.