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Electrophoretic interactions and aggregation of colloidal biological particlesThe separation of cells or particles from solution has traditionally been accomplished with centrifuges or by sedimentation; however, many particles have specific densities close to unity, making buoyancy-driven motion slow or negligible, but most cells and particles carry surface charges, making them ideal for electrophoretic separation. Both buoyancy-driven and electrophoretic separation may be influenced by hydrodynamic interactions and aggregation of neighboring particles. Aggregation by electrophoresis was analyzed for two non-Brownian particles with different zeta potentials and thin double layers migrating through a viscous fluid. The results indicate that the initial rate of electrophoretically-driven aggregation may exceed that of buoyancy-driven aggregation, even under conditions in which buoyancy-driven relative motion of noninteracting particles is dominant.
Document ID
19950008164
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Davis, Robert H.
(Colorado Univ. Boulder, CO, United States)
Nichols, Scott C.
(Colorado Univ. Boulder, CO, United States)
Loewenberg, Michael
(Colorado Univ. Boulder, CO, United States)
Todd, Paul
(Colorado Univ. Boulder, CO, United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1994
Publication Information
Publication: NASA. Lewis Research Center, Second Microgravity Fluid Physics Conference
Subject Category
Inorganic And Physical Chemistry
Accession Number
95N14578
Funding Number(s)
CONTRACT_GRANT: NAG8-945
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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