口服制剂溶出度质量标准的建立

固体药物口服后，在胃肠内经过分散、溶解、膜渗透才能被吸收。如果固体制剂的崩解、溶出不好，有效成分的吸收率就低，也就不能发挥预期的疗效。因此，对于相同的活性药物而言，药效的高低主要取决于药物从固体制剂中的溶出和溶解。药物的疗效是通过临床和血药浓度来测定评估。而现实生产中，我们是采用体外实验溶出速率的测定来替代体内实验对药品的质量进行控制的。

Electrical capacitance volume tomography for measurement soil water infiltration in vessel experiments

Electrical capacitance volume tomography(ECVT) is a recently-developed technique for real-time,non-invasive 3D monitoring of processes involving materials with strong contrasts in dielectric permittivity.This work is first application of the method to visualization of water flow in soil.We describe the principles behind the method,and then demonstrate its use with a simple laboratory infiltration experiment.32 ECVT sensors were installed on the sides of an empty PVC column.Water was poured into the column at a constant rate,and ECVT data were collected every second.The column was then packed with dry sand and again supplied with water at a constant rate with data collected every second.Data were analyzed to give bulk average water contents,which proved consistent with the water supply rates.Data were also analyzed to give 3D images(216 voxels) allowing visualization of the water distribution during the experiments.Result of this work shows that water infiltration into the soil,wall flow,progress of the unstable wetting front and the final water distribution are clearly visible.

对氧化银与过氧化氢反应的探究

在研究氧化银与过氧化氢的氧化还原反应时，反应产生的氧气的体积大大超出理论值。为此，笔者就这一问题进行了分析，作出假设，并利用动力学实验手段探究其反应机理。该反应刚开始时有一个第一步与第二步同时进行的过程，即氧化银被还原为单质银的同时，新产生的单质银已经开始催化过氧化氢的分解了。