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 30 for “"Particle characteristics"”.
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Influence of some particle characteristics on the small strain response of granular materials
… in the literature showing the influence of particle characteristics on the small strain response of geomaterials.<br/>In this research the effects of some particle characteristics such as particle size and particle shape on the small strain response of soils are investigated. Granular …
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Metal sulphide precipitation : effect of operational parameters on particle characteristics and process efficiency
… difficult to control and a large number of small particles are formed during the process. This leads to significant technical challenges with respect to solid-liquid separation and subsequent recovery of the precipitate. Despite the theoretically high metal removal, related to the low solubility …
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Investigation into the kinetics, mechanisms and particle characteristics of selenium precipitation from copper sulphate solution.
… which favour nucleation over any other particle formation processes. There is currently no fundamental information on the nucleation kinetics of this important process. Furthermore, the fundamental chemistry and mechanisms involved in this process are not fully understood. In this study, …
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A comparative study of freeze-thaw processes for conditioning wastewater and water treatment sludges
… techniques for improving the dewatering characteristics of both wastewater and water treatment sludges. Sludges tested included waste activated sludge, primary sewage sludge, waste activated/primary sewage sludge mixtures and alum sludge. The direct-freeze methods examined were the use of …
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Determination of the Oxidative Capacity of Soot Toward GSH and Characterization of Soot Physicochemical Properties
… of reactive oxygen species (ROS), specific particle characteristics responsible for this detrimental effect are not well understood. In this research, the quantitative determination of the biologically relevant antioxidant, glutathione (GSH), was optimized for use as an indicator of …
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Optical measurement of ash particle size and velocity in gas-solid flow
… the size and velocity distribution of moving particles in a gas-solid environment. The prototype system consists of a digital image acquisition module and MATLAB RTM image-processing module. Two specific applications were conducted. The first is the measurement of ash particle characteristics …
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A MODEL OF THE BEAM-PLASMA DISCHARGE
… observed discharge signatures (wave, light and particle characteristics). The agreement with the experimental scaling law is remarkably good.
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Effects of Dust Controls and Dust Sources on Respirable Coal Mine Dust Characteristics
… there is increasing awareness that RCMD particle characteristics, in addition to mass, might be important. This dissertation comprises four separate studies which explore the effects of primary RCMD sources and/or engineering controls on particle size and constituents. To enable a direct …
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The wear of materials in hydraulic transport pipelines
… with a decrease in the average rounding of the particles. These changes in particle characteristics occur with time due to comminution within the pump and pipeline. The mechanical properties and wear rates of the materials evaluated were examined to determine whether any relationships existed.
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Characterising the potential health risks associated with coal dust
… however, no consensus has been reached on which characteristics are relevant to pulmonary toxicity. This study hypothesises that the toxic potential of inhalable coal dust can be attributed to reactive mineralogy and the specific surface area for interaction between the particles and primary …
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Theoretical and experimental investigation of particle interactions in pharmaceutical powder blending
… and therefore higher manufacturing costs. Since particles are the basic unit of powder flow, a fundamental understanding of the crucial particle characteristics and particle interactions is essential for a good prediction and control of the blending process. In this work, inter-particle adhesion …
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HDL Phospholipid and ABCA1-Mediated Cholesterol Efflux Are Reduced in Patients with Very High HDL-C Who Develop Early Coronary Artery Disease
… and HDL-C level. RESULTS: Comparison of HDL particle characteristics between cases and controls demonstrated a significant reduction in HDL phospholipid composition and cholesterol efflux capacity in cases as compared to controls. CONCLUSION: Reduced cholesterol efflux capacity in cases with …
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Stratigraphy and sedimentology of the Tongue River formation (Paleocene), southeast Golden Valley County, North Dakota
… and analyzed for total carbonate content, particle size, particle roundness, and mineral composition. In the area studied, the Tongue River Formation is 763 feet thick which is considerably thinner than in surrounding areas. The lower member of the Tongue River Formation is 313 feet thick …
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Application of a Non-intrusive Optical Non-spherical Particle Sizing Sensor at Turboshaft Engine Inlet
… dangerous. In order to combat these issues, a particle sensor with the ability to monitor in-stream particulate size, shape, and mass flow rate is necessary. Our team with the Advanced Propulsion and Power Laboratory developed a non-intrusive optical sensor that is able to characterize …
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Magnetic Targeted Drug Delivery
Methods of guiding magnetic particles in a controlled fashion through the arterial system in vivo using external magnetic fields are explored. Included are discussions of applications, magnetic field properties needed to allow guiding based on particle characteristics, hemodynamic forces, the …
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Nanofluid-based receivers for high-temperature, high-flux direct solar collectors
… direct solar receivers, where nanoparticles in a liquid medium can scatter and absorb solar radiation, have recently received interest to efficiently distribute and store the thermal energy. In this thesis, a combined modeling and experimental study to investigate the efficiency of …
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Annular Flow Synthesis and Assembly of Two-Dimensional Materials
… with shear. To investigate the dynamics of particle growth I used LTEM to find that layered double hydroxides (LDH) may crystallize via oriented attachment, which is accelerated by hydrodynamic flow. These observations are used to formulate a mechanism that explains the non-monotonic …
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Drivers of Spatial Dispersion and Residence Time of Coarse Sediment in Gravel-Bed Rivers
… field and flume experiments to study dispersive characteristics of coarse sediment in gravel-bed channels. This study interrogates tracer data from previous flume experiments and three field studies, the Allt Dubhaig, Monachyle Burn and East Creek, to investigate dynamics of vertical mixing and …
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PARTICLE-WATER INTERACTIONS OF HYDROPHOBIC ORGANIC MICROPOLLUTANTS IN MARINE SYSTEMS
… matter, suspended particulate matter [SPM], particle type and salinity) on HOM behaviour was investigated by employing samples from estuaries with different geochemical signatures (Chupa, Russia, and the Dart, Plym, Beaulieu and Carnon, U K ) . A laboratory-based technique was developed for …
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Structure and Nitrogen Chemistry in Coal, Biomass, and Cofiring Low-NOx Flames
… straw, wood, and 4 straw/coal cofiring flames. Particle samples were also obtained from 5 of the flames. Intermittent flamelets were frequently observed in the flames. Viewing the substructure of the flame as individual flamelets provides critical insight for the interpretation of the data. The …
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