Snapshots of normalized concentration inside the intestinal lumen

For absorbable substances, a first-order absorption term can be coupled with the convection-dispersion (6.15) to model both the fluid flow and the absorption process  

The model includes more realistic features than previously published dispersion models for the gastrointestinal tract, but the penalty for that is that it can be solved only numerically and includes a large number of parameters that are difficult to be estimated based solely on blood data. 

The assumptions of homogeneity and/or well-stirred media used in Sections 

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