Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"hydrodynamic focusing"”.
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Vertical hydrodynamic focusing in an isotropically etched glass microfluidic device
… environments and reactions. Vertical hydrodynamic focusing is one possible way to improve the optical performance of these devices while maintaining precision control. Vertical hydrodynamic focusing was studied through the use of computation fluid dynamics (ADINA) and experimental …
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Design of hydrodynamic focusing micro mixers for broad timescale optical investigations
Includes bibliographical references (pages 60-66).
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Mitigation of losses from hydrodynamic mixing in a hydrogen bromine Laminar flow battery
… is predicted to cause less mixing than employing hydrodynamic focusing of the oxidant stream. When hydrodynamic focusing is used in channels with heights on the order 500 [mu]m or less, numerical simulations show recirculating flows at the inlet junction and experimental results show a decrease in …
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Development of micro analytical devices
… study of enzyme cofactors in batch and hydrodynamic systems and also provides a numerical investigation of mass transfer over electrodes inside microreactors. Chapter 4 investigates the effect of hydrodynamic focusing within a microfluidic device in detail, using experimental and …
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Computational fluid dynamic (CFD) optimization of microfluidic mixing in a MEMS steam generator
… in two dimensions. The results indicate that hydrodynamic focusing of the reactant at the inlet, in addition to the amount and density of added obstruction features, has the most significant impact on mixing efficiency and increased pressure drop. The study presents mixing quality and pressure …
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Protein Structural Studies by Oxidative Labeling and Mass Spectrometry
… resolution. By using an ultra-rapid mixer with hydrodynamic focusing this thesis provides the groundwork for future covalent labeling studies that will employ ∙OH labeling with unsurpassed time resolution. Together with ESI-MS detection this approach has the potential to provide detailed …
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Hydrodynamic Focused Passive Separation Under Continuous Flow in a Microfluidic Chip
… circuit to create variable flow rates for hydrodynamic focusing to drain channels and collection outlets. By varying the diameter of the sample inlet connection into the reservoir, the particle position was influenced significantly, which enabled desired separations. Additionally it was …
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Physics-based model and data analysis for the estimation of transverse flowing particles
In traditional flow cytometry, a hydrodynamic sheath is used to precisely position particles for analysis by a tightly focused laser. This precise analysis provides for well- behaved pulse shapes that allow for accurate correlation of scatter and fluorescence pulse width, area, and peak values to …
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Three dimensional optofluidic devices for manipulation of particles and cells
… to manipulate the injected sample fluid through hydrodynamic focusing and optically manipulate the individual particles, respectively. This geometry provided a more efficient way of investigating optical manipulation within the device. Finally, work towards developing a fully optimised 3D cell …
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Microfluidics for Cell Manipulation and Analysis
… in a microchamber due to isoelectric focusing (IEF). In contrast to conventional IEF techniques for protein separation, a matrix is not required in our system, the presence of which would even block the movement of the bulky cells. Electric field is, also, used to breach the cell …
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Advanced flow lithography and barcoded particles
… (in-plane dimensions) of particles. Also, hydrodynamic focusing lithography (HFL) was developed to offer z-directional (particle height direction) chemical anisotropy to particles. Lastly, oxygen-free flow lithography was a technique designed to extend current PDMS-based FL to any kinds of …
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An electrical microcytometer for portable blood analysis in global health applications
… to enumerate CD4+ T cells. Three-dimensional hydrodynamic focusing was used to take advantage of the laminar flow regime found in microfludics and increase the counting accuracy of the device. Second, a differential counting stage was added that selectively counted CD4+ T cells from leukocyte …