The onset of electrohydrodynamic instability in isoelectric focusing

Persistent Link:
http://hdl.handle.net/10150/291745
Title:
The onset of electrohydrodynamic instability in isoelectric focusing
Author:
Baldessari, Fabio, 1979-
Issue Date:
1993
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The onset of electrohydrodynamic motion in a thin layer of liquid has been investigated for the case in which the electrical conductivity varies linearly across the liquid layer. It is shown that a finite conductivity gradient can be quiescently sustained, provided certain requirements are satisfied. Dimensional analysis shows, and numerical computations confirm, that the conditions for the onset of motion in the layer can be characterized by two dimensionless parameters: the electrical Rayleigh number, and the dimensionless conductivity gradient. Interest in the problem stems from experiments on isoelectric focusing (IEF), an electrically-driven separation process used to purify peptide and protein mixtures. Previous experiments had led to the postulate that, as conductivity gradients developed during IEF, electrohydrodynamic convection would arise to disrupt the separation process. The theory developed here supports such a postulate.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Engineering, Chemical.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Chemical Engineering
Degree Grantor:
University of Arizona
Advisor:
Baygents, James C.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleThe onset of electrohydrodynamic instability in isoelectric focusingen_US
dc.creatorBaldessari, Fabio, 1979-en_US
dc.contributor.authorBaldessari, Fabio, 1979-en_US
dc.date.issued1993en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe onset of electrohydrodynamic motion in a thin layer of liquid has been investigated for the case in which the electrical conductivity varies linearly across the liquid layer. It is shown that a finite conductivity gradient can be quiescently sustained, provided certain requirements are satisfied. Dimensional analysis shows, and numerical computations confirm, that the conditions for the onset of motion in the layer can be characterized by two dimensionless parameters: the electrical Rayleigh number, and the dimensionless conductivity gradient. Interest in the problem stems from experiments on isoelectric focusing (IEF), an electrically-driven separation process used to purify peptide and protein mixtures. Previous experiments had led to the postulate that, as conductivity gradients developed during IEF, electrohydrodynamic convection would arise to disrupt the separation process. The theory developed here supports such a postulate.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectEngineering, Chemical.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineChemical Engineeringen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorBaygents, James C.en_US
dc.identifier.proquest1355157en_US
dc.identifier.bibrecord.b3108946x9en_US
All Items in UA Campus Repository are protected by copyright, with all rights reserved, unless otherwise indicated.