title: Steady-state sieving across membranes.
abstract: The constraint of steady-state operation for sieving or ultrafiltration across membranes greatly restricts possible theoretical mechanisms. Effective sieving in the steady state requires the coexistence of a removal mechanism with the rejection mechanism. These points are illustrated without elaborate mathematics by a model of membranes in a series array with intervening compartments. This model also shows that in certain regimes the structure of the first membrane alone determines the overall sieving characteristics of the array.
mesh_terms: D002845:Chromatography; D005374:Filtration; D008567:Membranes, Artificial; D008962:Models, Theoretical
chemical_list: D008567:Membranes, Artificial