Results 161 to 170 of about 1,726 (195)
A flow-through electroporation device utilizing Dean Vortex to enhance cell viability
2015 Transducers - 2015 18th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS), 2015 This paper reports a flow electroporation device, in which the Dean Vortex is employed to separate the cells from toxic by-product near the electrode during electroporation. This technique dramatically increases the cell viability, without decreasing the transfection rate.
Deyao Zhao, Mengxi Wu, Zicai Liang
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Dean Vortex Membrane Microfiltration Non-Newtonian Viscosity Effects
Industrial & Engineering Chemistry Research, 2002 Many industrial feeds behave as non-Newtonian fluids, and little understanding exists as to their influence on cross-flow microfiltration (CMF) performance. The viscosity effects of a model non-Newtonian shear-thickening fluid were investigated in CMF with and without suspended silica particles in the feed.
Schutyser, M.A.I., Belfort, G.
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Dean Vortex Membrane Microfiltration and Diafiltration of rBDNF E. coli Inclusion Bodies
Biotechnology Progress, 2002 Abstract Cross‐flow microfiltration (CMF) and diafiltration were used to concentrate and purify recombinant Brain‐Derived Neutrophic Factor (rBDNF) inclusion bodies from an E. coli cell suspension and a homogenized E.
Schutyser, M.A.I. +3 more
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Flux enhancement during Dean vortex microfiltration. 8. Further diagnostics1
Journal of Membrane Science, 1997Abstract Controlled centrifugal instabilities (called Dean vortices) resulting from flow around a curved channel have been used to reduce both concentration polarization and membrane fouling during microfiltration. These vortices enhance back-migration through convective flow away from the membrane–solution interface and allow for increased membrane ...
Georges Belfort
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Design and evaluation of a Dean vortex-based micromixer
Lab on A Chip, 2004A mixer, based on the Dean vortex, is fabricated and tested in an on-chip format. When fluid is directed around a curve under pressure driven flow, the high velocity streams in the center of the channel experience a greater centripetal force and so are deflected outward.
Peter B Howell +2 more
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Splitting, merging and spanwise wavenumber selection of Dean vortex pairs
Experiments in Fluids, 1994Splitting, merging and spanwise wavenumber selection are studied during the initial development of Dean vortex pairs in a channel with mild curvature, an aspect ratio of 40, and an inner to outer radius ratio of 0.979. Two types of splitting events, and four types of merging events are evident from flow visualizations at Dean numbers from 75 to 220 ...
P M Ligrani, Ligrani P M
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UV-C treatment of juices to inactivate microorganisms using Dean vortex technology
Journal of Food Engineering, 2011Abstract A laboratory-scale UV-C treatment device based on Dean vortex technology was tested for its potential to inactivate spoilage microorganisms in cloudy fruit juices. A log 5 and log 6 reduction could be achieved by inactivating Lactobacillus plantarum BFE 5092 and Escherichia coli DH5α in naturally cloudy apple juice at 1.9 and 7.7 kJ/L ...
Alexandra Müller +2 more
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Protein transmission during Dean vortex microfiltration of yeast suspensions
Biotechnology and Bioengineering, 1999Substantially higher rates of protein and fluid volume transport for microfiltration of yeast suspensions were possible with improved hydrodynamics using centrifugal fluid instabilities called Dean vortices. Under constant permeate flux operation with suspended yeast cells, a helical module exhibited 19 times the filtration capacity of a linear module.
Georges Belfort
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