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Showing 1 to 20 of 23 for “"Trapping Efficiency"”.
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Hydraulic Performance of Porous Sediment Control Structures
… fabric and rockfill as well as their sediment trapping efficiency are studied in this research. The head-discharge relationship for filter fabric has been developed by first applying the Bernoulli equation to a single opening and then extending the principle to the entire cross-sectional area. …
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Quantum Yields And Mechanism In Titanium Dioxide Mediated Photocatalysis
… is proposed.;A method of determining the trapping efficiency of {dollar}cdot{dollar}OH radicals was developed with the help of a spin trap/EPR method, using the spin trap 5,5-dimethyl-1-pyrroline N-oxide (DMPO), for the measurement of growth rates of the spin adduct DMPO-OH and HPLC …
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Optimizing mixer geometries for dielectrophoretic micro-concentrators
… concentrator exhibits up to 1.5 x improvement in trapping efficiency as compared to a concentrator without mixers.
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Supercritical fluid extraction as a sample preparation technique for the isolation of polar pharmaceutical compounds
… the effect of high levels of polar modifier on trapping efficiency. The mode of modifier introduction was found to have a considerable effect on trapping efficiency, as in-line modifier addition rather than matrix spiking was determined to be best when introducing high levels of liquid modifier. …
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Engineering the optical properties of luminescent solar concentrators at the molecular scale
… mechanisms in LSCs, namely transport losses and trapping losses. We used phycobilisomes, a biological light-harvesting complex, as dyes in the LSC collector to circumvent transport losses caused by photon re-absorption. The selfassembled structure of phycobilisomes couples numerous donor …
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ΠΕΙΡΑΜΑΤΙΚΗ ΚΑΙ ΘΕΩΡΗΤΙΚΗ ΑΝΑΛΥΣΗ ΚΑΙ ΠΡΟΓΝΩΣΗ ΛΕΙΤΟΥΡΓΙΩΝ ΠΑΓΙΔΑΣ ΑΙΘΑΛΗΣ ΟΧΗΜΑΤΩΝ
… WALL TEMPERATURES, TRAP LOADING, REGENERATION EFFICIENCY. BY USE OF THIS MODEL AND WITH THE AID OF AN EXTENSIVE SERIES OF MEASUREMENTS IN LABORATORY AS WELL AS ON REAL WORLD CONDITIONS, THE CERAMIC SMOKE TRAP SYSTEM DEVELOPED BY THE LABORATORY OF APPLIED THERMODYNAMICS, ARISTOTLE UNIVERSITY, …
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Insulator-based Dielectrophoresis for Bacterial Characterization and Trapping
… insulating features with the goal of improving trapping efficiency of biological species at low applied signals and fostering wide frequency range operation of the microfluidic device. The dielectric properties of bacteria as well as submicron polystyrene beads are discussed and the impact of …
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Volatile Ice Deposits in Lunar Polar Regions and Their Sources
… on the present-day surface of the Moon. The trapping of volatiles in permanently shadowed regions (PSRs) near the rotational poles was explored using a combination of numerical models of ballistic transport of water vapour. This process included both a validated Monte Carlo model and a full …
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Keeping Pace with Relative Sea Level Rise: Marsh Platform Monitoring Shows Minimal Sediment Deficit along the Louisiana Coast
… rivers, resulting in an initial sediment trapping efficiency of 18%. The remaining sediment must be delivered indirectly to the coast after passing through the ocean, accounting for another 39 MT/yr of inorganic sediment being trapped on coastal marshes. 17 MT/yr organic sediment is …
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Nanoscale self-organization in irradiated ternary alloys
… which is rationalized by the very high trapping efficiency of ramified W cores for Nb atoms. 2) In the Cu-Ag-W system, where Ag is moderately immiscible with Cu and is highly immiscible with W, compositional patterning, as a steady state of the system under irradiation, can be extended …
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Modeling and Observing Atmospheres of Terrestrial Exoplanets
… use a Monte Carlo simulation to infer water cold-trapping efficiency for different planetary configurations and find that there are optimal conditions for planetoids to accumulate water on the surface. Planetoids outside these conditions are either too small and thus lose water to thermal escape, …
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An atom trap trace analysis (ATTA) system for measuring ultra-low contamination by krypton in xenon dark matter detectors
… Laboratory, uses standard laser cooling and trapping techniques, and counts single trapped atoms. Since the isotopic abundance of 85Kr in nature is 1.5 × 10^-11, the 85Kr/Xe level is expected to be ~10^-23, which is beyond the capability of our method. Thus we detect the most abundant (57%) …
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New Constraints on Fault-Zone Structure from Seismic Guided Waves
… GW. This is because the frequency-dependent trapping efficiency of the waveguide changes with depth. The near-surface fault structure efficiently guides waves at lower frequencies than the deeper fault. Fault structure at seismogenic depth requires the analysis of data at higher frequencies …
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Improving Off-line and On-line Supercritical Fluid Extraction Techniques by Elevating the Post-Restrictor Pressure
… As a result of these high flow rates, solvent trapping is not efficient in many cases, and the more complicated sorbent trapping technique must be used. In addition, loss of the collection solvent may occur during the process making it difficult to work with small volumes, which are desirable …
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Design and Implementation of Position-Encoded Microfluidic Microsphere-Trap Arrays
… microfluidic technology and a hydrodynamic trapping mechanism. We call our device microfluidic microsphere-trap arrays. To fully realize the potential of the device in biomedical applications, we utilize statistical performance analysis, mathematical optimization, and finite element fluid …
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Reservoir sedimentation in dryland catchments : modelling and management
… and the evaluation of sediment release efficiency of sediment management techniques. It simulates sediment transport along the longitudinal profile of a reservoir. The reservoir is divided into cross sections to elaborate the sediment budget. The sediment transport component is …
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Spatial variation in small mammal communities across the Karoo Shale Gas Development Area of South Africa
… of 271 individuals representing 14 taxa. Trapping success was low 5.14% (mean per site 0.37± 0.61%). Most captures (87%) and individuals (83%) were recorded in the Nama-Karoo (294 captures, 226 individuals, 15 sites), whereas only 5 captures were recorded in Albany Thicket (3 sites). Four …
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Trapping Efficiencies for the BLH-84, Helley-Smith, Elwha, and TR-2 Bedload Samplers
Bedload-trapping efficiencies for four types of pressure-difference bedload samplers – a standard Helley-Smith (intake-nozzle width and height of 76.2 mm x 76.2 mm), BLH-84 (76.2 mm x 76.2 mm), Elwha (203 mm x 102 mm) and Toutle River-2 (305 mm x 152 mm) a standard Helley-Smith, US BLH-84 (both …
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Supercritical Fluid Extraction Directly Coupled with Reversed Phase Liquid Chromatography for Quantitative Analysis of Analytes in Complex Matrices
… to enhance ionic strength and thus extraction efficiency. Methanol and 2-propanol were used as CO2 modifiers. Two modifier modes were compared, e.g. dynamically mixing modifier with the CO2 extraction fluid, and pre-spiking modifier in the extraction vessel. Surprisingly, we found pre-spiking …
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Acoustofluidic Innovations for Cellular Processing On-Chip
… in my third chapter. First, I determine the trapping and arraying efficiencies of cells in my acoustofluidic chip to be 80 and 67 % respectively. Here, the arraying efficiency represents the percentage of single cells in the compartment regions and is dependent on both the trapping efficiency …
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