A Prediction Model of the Capillary Pressure J-Function

The capillary pressure J-function is a dimensionless measure of the capillary pressure of a fluid in a porous medium. The function was derived based on a capillary bundle model. However, the dependence of the J-function on the saturation Sw is not well understood. A prediction model for it is presented based on capillary pressure model, and the J-function prediction model is a power function instead of an exponential or polynomial function. Relative permeability is calculated with the J-function prediction model, resulting in an easier calculation and results that are more representative.

[Protection mechanism of huanshaodan decoction in the brain]

OBJECTIVE

To observe the protective effect of Huanshaodan (HSD) in mouse brain in a steady ischemia-reperfusion model.

METHODS

Step-through experiment, receptor binding test and choline acetyl-transferase (CAT) activity determination was performed.

RESULTS

After HSD treatment, mice made much less mistakes in step-through experiment than sham groups. Meanwhile the 3H-MK801 binding of cerebral cortex and hippocampus tissues was significantly decreased. CAT activity of cerebral cortex and hippocampus tissue were increased respectively.

CONCLUSION

HSD might antagonize ischemia injury of brain through modulating excessive activation of glutamate N-methyl-D-Aspartic acid receptors.