Results 251 to 260 of about 124,436 (296)

Cyclical electrical field flow fractionation

ELECTROPHORESIS, 2005
AbstractCyclical electrical field flow fractionation (Cy/ElFFF) is demonstrated in a standard electrical field flow fractionation (ElFFF) channel for the first time. Motivation for the use of alternating current (AC) fields in a traditionally direct current (DC) technique are discussed.
Bruce K, Gale, Merugu, Srinivas
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Development of Electrical Field-Flow Fractionation

Analytical Chemistry, 2000
Electrical field-flow fractionation (ElFFF) results for a series of polystyrene latex beads are presented. To first approximation, retention behavior can be related to conventional FFF theory, modified to account for a particle-wall repulsion effect.
, Tri, , Caldwell, , Beckett
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Sedimentation Field Flow Fractionation of DNA's

Science, 1984
Sedimentation field flow fractionation (SFFF) is a method for purifying and providing mass or size distribution information on samples containing particulates or soluble macromolecules. Since SFFF separations are based on simple physical phenomena related to first principles, molecular weight (or particle sizes) can be determined without ...
L E, Schallinger, W W, Yau, J J, Kirkland   +2 more
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Electrical Field-Flow Fractionation of Proteins

Science, 1972
Protein separation has been achieved by electrical field-flow fractionation, a heretofore unrealized separation technique. Some advantages of this method relative to electrophoresis are the low voltage required, the lack of adverse heating and support effects, and the existence of the method as an elution technique.
K D, Caldwell, L F, Kesner, M N, Myers, J C, Giddings   +3 more
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Sedimentation Field Flow Fractionation: Applications

Science, 1982
Sedimentation field flow fractionation is a powerful, new, high-resolution separation method for a wide variety of colloids, micelles, particulates, and soluble macromolecules of biological interest. Advances in instrumentation allow sedimentation field flow fractionation operation with rotor speeds up to 32,000 revolutions per minute (∼85,
J J, Kirkland, W W, Yau
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Flow field-flow fractionation: Critical overview

Journal of Chromatography A, 2013
This overview regards some critical issues in performing flow field-flow fractionation (flow FFF, FlFFF, AF4, HF-FlFFF, HF5). It includes the channel thickness, void time, channel-flow parabolic profile, channel-flow velocity gradient, uniformity of the cross-flow, sample injection time, relaxation/focusing time, width of sample starting zone ...
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Field flow fractionation in biomedical analysis

Biomedical Chromatography, 1991
AbstractSamples of biomedical interest which have been analysed by field‐flow fractionation techniques are surveyed. The list begins with whole cells and microorganisms, going through viruses, nucleic acids, cell fragments and organelles, down to proteins and their aggregates.
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Two-dimensional field-flow fractionation

Journal of Chromatography A, 1990
Multidimensional field-flow fractionation (FFF) is described in two major forms: one in which different separative stages are coupled together and one in which two independent displacements, at least one of them FFF, are carried out in a generally planar channel structure.
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Zone Dispersion in Field-Flow Fractionation

2005
All separation processes are inherently accopanied by zone broadening. These processes are theoretically treated in this chapter.
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Investigation of optimization and evaluation criteria for flow field in proton exchange membrane fuel cell: A critical review

Renewable and Sustainable Energy Reviews, 2023
Ben Chen
exaly