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 20 of 36 for “"polystyrene beads"”.
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Sound absorption characteristic of lightweight brick containing Expanded Polystyrene Beads (EPS) and Palm Oil Fuel Ash (POFA)
… of lightweight bricks containing expanded polystyrene beads (EPS) and palm oil fuel ash (POFA). In order to fulfill the standard of a lightweight brick to be used as a building element, the physical and mechanical properties were test first. EPS was used as a sand replacement whereas POFA …
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Surface Directed Monoclonal Antibodies against STEC Aid in the Reduction of Pathogen Detection Times from Food and Water
… specific monoclonal antibody (mAb)-coated Dynabeads, and detection via fluorescence microscopy, (2) the addition of enrichment culture into a flow through system consisting of a column packed with large polystyrene beads (≥ 100 μm) coated with specific mAbs for capture. The results indicate …
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Characterization of Pressure-Driven and Electro-Kinetically Driven Flow in a Micro-Fluidic Chip Using Particle Imaging Velocimetry
… to measure the flow of a solution of fluorescent polystyrene beads in PDMS channels using a laser confocal microscope. This showed that particles easily stuck to the channel making it difficult to measure over time. In addition, bubble formation in the channel made measuring velocities difficult. …
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Negative magnetophoresis of submicron species in magnetic nanofluids
… which forced submicron fluorescently-tagged polystyrene beads to focus in the region between the two magnet pairs. Size-based trapping was achieved using a microchip that produced spatially increasing magnetic field gradients that trapped flowing polystyrene beads at different locations, …
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Label-free buoyant mass assays with suspended microchannel resonators
… bind targets directly, or individually weighed polystyrene beads can be used as mobile supports. As in other label-free detection methods, biomolecular measurements in complex media such as serum are challenging due to high background signals from non-specific binding. We demonstrate that …
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Plasmachemical Functionalisation for Modification of Surfaces with Biomolecules and Metals
… onto substrates such as glass, silicon, polystyrene beads and carbon nanotubes. Secondly, the use of plasmachemical layers for the tethering of metal centres is also presented, with aldehyde and vinylpyridine functional surfaces presented, and their use in the metallization of substrates …
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Manipulation of bacteria using three dimensional insulator based dielectrophoresis
… properties of a range of bacteria, as well as polystyrene beads are examined. The impact of these results on the development of microbial fuel cells and portable low-cost clinical diagnostic tools is also discussed.
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Spray generation
… liquid axisymmetric jets flowing over sand and polystyrene (beads) roughed surfaces. Experiments were conducted with freshwater and Eulerian and Lagrangian methods of description were used in the analysis. Measurements were made with three different high- speed imagers and two different …
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Experimental and computational studies of receptor-mediated cell detachment in shear flow
… assay to measure the force needed to detach polystyrene beads covalently coated with immunoglobulin G (IgG) from glass surfaces covalently coated with protein A (SpA). A spectrum of animal species sources for IgG permits examination of three decades of SpA/IgG binding affinity. The results …
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Controlled synthesis and characterization of templated, magneto-responsive nanoparticle structures
… The layer-by-layer technique was used to coat polystyrene beads with magnetic nanoparticles to create novel core-shell structures. The behavior of these structures under an applied magnetic field was modeled and the results were verified experimentally.
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Multi-frequency characterization of single cells through CM factors and dielectrophoresis
… balance positions of cells and calibrate it with polystyrene beads. We utilize BA/F3 cells to define balance position equilibration when shifting from one frequency to the next within this device. Finally, we find balance positions for three different activation levels of HL60 cells treated with …
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Insulator-based Dielectrophoresis for Bacterial Characterization and Trapping
… properties of bacteria as well as submicron polystyrene beads are discussed and the impact of these results on the future development of iDEP microfluidic systems is explored.
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Study of disposable microdevices for DNA electrophoresis
… samples were run on the chip, including polystyrene beads, organic dye molecules, and single tandem repeat (STR) allelic ladders. The chip demonstrated its electrophoretic efficiency, evincing a low, almost negligible amount of electroosmotic flow. The separation of the dye and DNA was …
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A microfabricated dielectrophoretic micro-organism concentrator
… I have characterized the system throughput using polystyrene beads and I have characterized the system electrically using lumped circuit element models.
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Heat Transfer in Laminar Solid-Fluid Suspension Flow
… in silicone oil and kerosene mixture, and polystyrene suspensions in silicone oil and Freon 113 mixture were measured in a rotating Couette flow apparatus. Contrary to the case of single phase fluid, effective thermal conductivity was observed to be shear dependent when the particle Peclet …
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Diffuse reflectance spectroscopy of human colon tissue
… on a physical tissue model (phantom) composed of polystyrene beads and hemoglobin and it was found that it is suitable for application to the tissue data. Four parameters were obtained by analyzing the tissue data using the model: hemoglobin concentration, hemoglobin oxygen saturation, effective …
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Microfabricated magnetophoretic focusing systems for the separation of submicrometer particles
… profiles of polydisperse suspensions of polystyrene beads.
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Experimental Validation of Heteroclinic Orbit Dynamics in Inertial Microfluidics
… experiments were conducted using 15μm polystyrene beads across four dif- ferent flow configurations (ranging from 1:1:1 to 1:6:1 buffer-to-sample ratios). The results confirmed that particle migration is continuous and strongly size-dependent, and that in- creasing buffer flow enhanced …
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Magnetophoretic cell clarification
… column. Depending on the flow rate, up to 99% of polystyrene beads of different sizes could be removed from the feed after one pass through the quadrupole system. The recovery efficiency decreased with increasing flow rate, i.e. with decreasing residence time in the device. E. coli cells were able …
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Biolithography : selective joining using antibody-antigen reactions
… present investigation, antibody coated 1 [mu]m polystyrene beads and antigen coated glass surface substrates, as well as, antigen solutions were used. Both antibodies and antigens were multivalent i.e. have more that one binding site for each other; thus, two antibody coated beads could be held …
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