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 69 for “"water interactions"”.
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Atmospheric organic aerosol - water interactions
… stand for the organic components. Hygroscopic water soluble organic material can enhance the water absorption of the particles, affecting their climate forcing. This dissertation explores the hygroscopic properties of atmospheric organic aerosol, the first part of the thesis is dedicated to the …
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Drug/Water interactions in hydrogel matrices
… has been the investigation of the role of water structuring effects in the widely different extents of irritancy displayed by certain antibiotics. The compounds involved were members of the Lincomycin group of antibiotics. The aqueous solution behaviour of these co~pounds was studied using …
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A study of lithographic ink and water interactions
Achieving and maintaining the correct ink/water balance is crucial for acceptable print quality; this involves factors affecting the emulsification of water and ink. This process was investigated with two designed model ink varnishes (one being 'hydrophilic' relative to the other 'hydrophobic' …
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COMPLEXATION AND PARTICLE-WATER INTERACTIONS OF NICKEL IN ESTUARIES
The speciation and particle-water interactions of Ni were investigated in three estuaries with contrasting pollution levels, hydrodynamics and geochemical characteristics. Samples of water and sediments were collected seasonally from the Tamar, Tweed and Mersey Estuaries. The chemical speciation of …
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Particle-Water Interactions of Ni and Zn in Coastal Waters
… but at the same rate in spring. Particle-solute interactions of Ni and Zn, investigated using the radioisotopes ⁶³Ni and ⁶⁵zn, indicated significant variation in metal partitioning (Kd) for the SPM end-members of the Humber coastal zone with Ni Kd's varying from 6.7 x 10² for Holderness Cliff …
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PARTICLE-WATER INTERACTIONS OF HYDROPHOBIC ORGANIC MICROPOLLUTANTS IN MARINE SYSTEMS
… (HOMs) is of paramount importance to water quality managers because of their toxicity, persistence, and liability to bioaccumulate. In this study, the role played by the main estuarine variables (organic matter, suspended particulate matter [SPM], particle type and salinity) on HOM …
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Trace Metal-Particle Water Interactions in the Western North Sea
… preferential particulate organic/biogenic-metal interactions. In contrast enhanced, though diffuse, atmospheric inputs of Pb from continental winds were considered to have contributed to the elevated Pbp concentrations (82 ± 27 ug g -1) observed offshore during winter Results from radiotracer …
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Investigation of Groundwater- Surface-Water Interactions – Application to Leech Lake Aquifer,
… essential for socio-economic development, water resources are inevitable. Food, feed, and shelter requirements are growing rapidly with the increase in the population of our world and on the other hand water resources are becoming scarcer to fulfill these demands. Therefore, it is highly …
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Quantifying groundwater-surface water interactions to improve the outcomes of human activities
<p>Interactions between surface water and groundwater impact both the quality and quantity of water resources. This dissertation is focused on the interactions between surface water in streams and groundwater in hyporheic zones and shallow fluvial aquifers, and how human beings influence these …
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Hydronium ion and water interactions with SiOSi, SiOAl, and AlOAl tetrahedral linkages
… relative order of stability for reactions of water and hydronium ion with the hydroxyacid molecules used in this study was found to be H₃O⁺ + SiOSi > H₃O⁺ + SiOAl > H₂O + SiOAl > H₃O⁺ + AlOAl ≃ H₂O + AlOAl > H₂O + SiOSi The results model the hydrophilic nature of aluminosilicate zeolites and …
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Ground water - surface water interactions in the lower Virgin River area, Arizona and Nevada
This study assessed interactions between ground water and surface water in the lower Virgin River, Arizona and Nevada, using stable isotopes and major ions as environmental tracers. The study reach starts at the Virgin River Gorge in Arizona and terminates at Lake Mead in Nevada, 80 km downstream. …
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Observations and implications of sediment-water interactions in the Niagara impoundment of southwest Virginia
… of the flow of the Roanoke River above the headwaters of Smith Mountain Lake. Agronomic analysis techniques were adapted and applied to provide quantitative analysis capability for the sediments. The superficial sediments were observed to constitute a considerable reservoir of nitrogen and …
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Flood Processes in Semi-arid Streams: Sediment Transport, Flood Routing, and Groundwater - Surface Water Interactions
… floods have the potential for great benefit in a water-limited environment, but also great devastation when powerful floods encounter human infrastructure. This dissertation employs an integrative approach to address several facets of flooding in semi-arid streams. In particular, information from …
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Sediment-water interactions in three Holocene saline, alkaline playas, south-central Oregon: Mineralogy and geochemistry
… well as chemical and isotopic analyses of groundwater and interstitial playa pore waters, have been used to improve understanding of the nature of sediment/water reactions in playa environments. Outcrop samples and 5 to 7 m deep playa cores were studied from three closed basins in south-central …
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Studies of Protein-Protein and Protein-Water Interactions by Small Angle X-Ray Scattering, Terahertz Spectroscopy, ASMOS, And Computer Simulation
… questions about protein-protein and protein-water interactions, which are very important for describing the energy landscape surface of proteins correctly. At first, we present a new method for computing protein-protein interaction potentials of solvated proteins directly from SAXS data. An …
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Competition Between Different Non-Covalent Interactions in Cluster Ions
Non-covalent interactions are important in ionic systems, where ion-molecule interactions must compete with molecule-molecule interactions. This competition between different non-covalent interactions ultimately governs the behavior of many processes. In this Thesis, competing noncovalent …
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Development of a Mathematical Model for Monitoring Recovery Boiler Dissolving Tank Sounds
… tank where it interacts violently with hot water. These smelt-water interactions allow for fast smelt dissolution, however too many violent interactions can also cause equipment damage. In severe cases, violent smelt-water interactions may result in dissolving tank explosions, costing …
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The rheology and dynamic properties of biopolymers in a colloidal suspension
… properties and the mechanism of biopolymer-water interactions. To date, there is still no consensus on the measurement of the solid-like behaviour or yield stress that is an important physical property to suspending particles in viscoelastic fluids. An understanding of the mechanism of …
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