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 60 for “"Suspended Particles"”.
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Suspended Particles as Photoelectrochemical Systems
… the fundamentals concerning three types of fine particles that can serve potentially as minute photoelectrochemical reaction centers in form of suspensions have been carried out for InP powders, colloidal CdS, and tris(2,2'-bipyridine)ruthenium(II) complex assembled in particles of zeolite X in …
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Geochemistry of suspended particles in the Tamar estuary
… (REE) abundances in intertidal sediments and suspended particles from the Tamar Estuary show little variation in REE concentrations along the estuary and only minor fractionation relative to standard shale. Fe, Mn, Cu, Zn, Ni & Co abundances in the estuarine suspended particles show …
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Permeability reduction in porous media due to suspended particles
… conductivity of the aquifer material by suspended particles, eventually clogging the aquifer. Clogging is the retention of fine particles in a geological formation. This process causes a reduction in pore space, which reduces the aquifer's capacity to store and transmit water. The purpose …
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The reactive transport of suspended particles : mechanisms and modeling
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1985.
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Interaction of two dimensional turbulent flow with suspended particles.
Massachusetts Institute of Technology. Dept. of Civil Engineering. Thesis. 1973. Ph.D.
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Fractionation & segregation of suspended particles using acoustic and flow fields
The fractionation of particles by size or by density has many applications in a variety of technologies. Decontamination and separation of fine sediments is useful in treating sediments. The application of acoustic standing wave fields for the fractionation and segregation of suspended particles …
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Effects of the composition of suspended particles in water on the photosynthetically usable radiation and remote-sensing reflectance
The total suspended solids concentration of a water body, usually denoted as TSS, is a useful indicator of water quality. The TSS is often empirically related to the downwelling irradiance (Ed) and above-surface remote-sensing reflectance (Rrs). However, the same TSS can result from different …
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THE EFFECT OF INDOOR TOTAL SUSPENDED PARTICLES (TSP) ON THE HUMAN UPPER RESPIRATORY SYSTEM: FROM THE MICROBIOME TO HERV METHYLATION
… is to investigate the effects of indoor Total Suspended Particles (TSP) on the upper respiratory microbiome and the methylation levels of HERV genes. Additionally, this study aims to examine whether the microbiome can influence the effect that indoor TSP has on HERV methylation. To achieve this …
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Cosmogenic ³²P and ³³P in the atmosphere and aligotrophic ocean and applications to the study of phosphorus cycling
… the activities and activity ratio P-33/P-32 in suspended particles and plankton tows at BATS station. The in situ production rates of radiophosphorus in the upper ocean were estimated by measuring the activities induced in Cl, K and S targets by cosmic rays. Knowledge of all the sources of …
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Observations of a particle capture on a cylindrical collector : implications for particle accumulation and removal in aquatic systems
Capture of suspended particles by cylindrical collectors is an important mechanism in many aquatic processes, such as larval settlement, suspension feeding, and vegetative filtration. The collector Reynolds number (Rec), based on the collector diameter, typically ranges from 1-1000 in aquatic …
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THE MICROSTRUCTURES OF ESTUARINE PARTICLES
A systematic study of the surface properties of suspended and bed sediments from the Tamar Estuary and Restronguet Creek was carried out using a nitrogen adsorption technique. The surface areas and porosities of the particles were determined using BET theory and capillary models applied to the gas …
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Theory and simulations of confined active suspensions
… suspensions, or suspensions of self-propelling particles such as swimming microorganisms remains a great challenge despite their ubiquity in biological systems. The long-ranged fluid-mediated interactions between suspended particles in the low-Reynolds-number regime are known to give rise to …
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Emission of Insoluble Mineral Particles from Ultrasonic Humidifiers
… focused on the behavior of insoluble iron oxides particles, and aluminum oxide particles in ultrasonic humidifiers. 10 mg/L Fe oxide particles and 5 mg/L Al oxide suspension solutions were added into tap water, as fill water for ultrasonic humidifiers operated for 14 hours. Denser, heavier …
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Estuaries as Sources of Methylated Arsenic to the North Sea
… and dimethylarsenic (DMA) in water, pore waters, suspended particles and bed sediments of the Humber Estuary, Thames Estuary and the southern North Sea. Dissolved inorganic As in the Humber Estuary showed removal in the mouth of the estuary in association with an Fe-rich outfall. Intertidal …
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Heat transfer in nano/micro multi-component and complex fluids with applications to heat transfer enhancement
… dynamics equations to model the movement of particles and the energy equation to find the thermal properties. This is a direct numerical simulation that models the free movement of the solid particles suspended in the flow and its effect on the temperature distribution. Parallel …
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Vertical Distributions of Zooplankton at the Mouth of Chesapeake Bay and Calibration of Backscatter From an Acoustic Doppler Current Profiler
… at 6-hr intervals, suggesting resuspension of particles due to semidiurnal tidal flows. Backscatter from a single frequency echosounder such as the ADCP may only produce a coarse estimate of suspended particles in estuaries such as Chesapeake Bay.</p>
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Observations from working with a simple mathematical model of light absorption by small particles in the ocean
… light absorption by a layer of water containing suspended particles. The model takes chlorophyll a absorption data, cell diameter, intracellular and bulk concentrations of chlorophyll a, pure water absorption data, and thickness of water layer as inputs, and outputs the attenuation by absorption …
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Colloidal Processing, Microstructural Evolution, and Anisotropic Properties of Textured Ultra-High Temperature Ceramics Prepared Using Weak Magnetic Fields
… describing the balance of torques acting on the suspended particles suggested that texture would form at such low magnetic fields. The calculations include a novel contribution of Stokes drag arising from the inhomogeneous velocity profile of the fluid during slip casting. Experimental …
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The biogeochemistry of marine particulate trace metals
Marine particles include living and non-living solid components of seawater, representing a dynamic and chemically diverse mixture of phases. Through a combination of method development, basin-scale particulate collection and analyses, modeling, and field experiments, this thesis examines both the …
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Field and laboratory observations of small-scale dispersion in wetlands
… predicting the behavior of dissolved species and suspended particles. However, many processes are involved, and they can interact in nonlinear ways. Relevant processes include turbulent diffusion, which describes net solute flux created by turbulent eddies. Other dispersive processes result from …
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