Filter coefficient depth

The filter coefficient A is thus seen to be a characteristic penetration depth of the suspended matter in the porous medium. 

In the manner described the filter coefficient A can be determined theoretically by using the appropriate single collector results. Experimentally A is obtained by measuring the suspended particle number density as a function of bed depth, and then determining the slope of plots of In n versus x. 

The capture rate equation is similar to the widely accepted rate equation which defines the filter coefficient (X) in deep bed filtration. The rate of removal of particles from a suspension with respect to depth is proportional to the concentration of particles in the suspension (7)... 

This assay is a variation of the cellulose filter assay that uses multiple arrangements of chemoattractant above and below the filter to distinguish chemokinesis and chemotaxis. In addition, the depth to which the cells penetrate the filter is determined. These features allow calculation of population parameters x, the random motility coefficient and X, a chemotaxis coefficient. 

---