© 1999 Robert A. Freitas Jr. All Rights Reserved.

Robert A. Freitas Jr., Nanomedicine, Volume I: Basic Capabilities, Landes Bioscience, Georgetown, TX, 1999

3.3 Membrane Filtration

Filtration through a permeable membrane is closely related to the process of diffusion, since in both cases random molecular motions help carry the process to completion. However, the presence of a membrane adds a new measure of control that is not exploited in simple diffusive transport. This control may be either passive or active, unidirectional or bidirectional, as described below.

Last updated on 7 February 2003