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 315 for “"Organics"”.
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Solar photodecomposition of dilute organics in acqueous streams
Includes bibliographical references.
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The effect of selected organics on breakpoint chlorination
… under the influence of three selected organics: dextrose, phenol, and phenylalanine. The initial ammonia nitrogen and organic compound concentrations were varied. The breakpoint curves and total Kjeldahl nitrogen removal efficiencies were determined, and it was demonstrated that each …
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Spectral Study of Asteroids and Laboratory Simulation of Asteroid Organics
… (65) Cybele indicative of water-ice and complex organics [1] [2] [3]. We further probed other primitive asteroids in the Cybele dynamical group and Themis family, finding diversity in the shape of their 3 ?m [4] [5] [6] and 10 ?m spectral features [4]. These differences indicated mineralogical …
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Development of an integrated photonic sensor for monitoring hazardous organics
… for the purpose of monitoring hazardous organics in the environment. The operation of the sensor is based on the principles of the Mach-Zehnder interferometry. The sensor consists of a patterned waveguide structure made of phosphosilicate core and silica cladding. LPCVD processes were …
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EFFECTS OF MICROTEXTURAL INTERACTIONS OF ORGANICS AND SILICA ON SILICA DIAGENESIS
Opaline silica (opal-A) is thermodynamically unstable at surface conditions and readily transitions into opal-CT and at higher temperatures and pressures, quartz. Past work has used the temperature dependency of this phase transition for paleothermometry in opal-bearing sedimentary rocks. Those …
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The chemistry of gold with unsaturated organics: coordination, activation and catalysis
The aim was to understand gold‟s reactivity with unsaturated organic bonds. We focused on the role of supporting ligands, activating agents and the organic substrates employed in such reactions. Gold tetrafluorophthalimidates have been isolated, with coordination found to be surprisingly strong; no …
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A Study of Buried Organics on Mars - A Computational And Experimental Approach
… computer model devised indicates rapid burial of organics and presents amount of organic carbon preserved at selected locations on Mars after 10 Martian years (99% preserved). The model is further extended globally to point at sites on Mars which are most favorable for organic preservation and …
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Gas chromatography/mass spectrometry response pattern analysis of volatile organics in soils
The purge-and-trap gas chromatographic/mass spectrometric methods used by government agencies and their contracting laboratories for the analysis of volatile organic compounds in soils require the addition of both surrogate and internal standards to the sample matrix just prior to purging the …
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Evaluation of methods for the recovery, chemical and toxicological characterization of trace organics
… and esthetic problems caused by trace organics, although their acute and long-term toxic potential has also been recognized.</p> <p>The overall objective of this investigation was the analytical and toxicological characterization of trace organics recovered concomitantly from Missouri …
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Algal and bacterial interactions in producing precursors of trihalomethanes and other halogenated organics
The objectives of this study were to determine: (1) whether or not heterotrophic microorganisms exert an effect on the trihalomethane (THM) or total organic halogen (TOX) formation potentials of algal extracellular products (ECP), and (2) whether or not diurnal cycling of THM and TOX precursors …
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‘Organics in ice’: Novel organic compounds in ice cores for use in palaeoclimate reconstruction
… ice core samples. A novel and promising area of ‘organics in ice’ research lies within the groups of primary and secondary compounds released from the terrestrial and marine biospheres; these compounds may help us to form a record of past biosphere emissions, with implications for biological …
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Characterization of organics for anaerobic digestion by modelling augmented biological methane potential test results
This study aims to establish a dynamic model for the simulation of biochemical methane potential (BMP) test results, as well as to determine the additional measurements required in the BMP assay procedure for the model to estimate the composition of a homogenous biodegradable particulate organic …
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Probing the role of clay minerals in the preservation of organics and soft tissues
Interactions between organics and various types of minerals have been well documented and studied both experimentally and in nature. Clays, which are aluminum silicate minerals, have been shown to be exceptional at the adsorption and/or incorporation of organics. These minerals have also been the …
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Role of oxidants in the removal of iron and organics from Harwood's Mill Reservoir
… and a preoxidant dose of 2 mg/L. Improvements in organics removal over that of the WTP suggested that poor organic removal contributed to the floe-formation problem.
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Residual Diesel Range Organics and Selected Frothers in Process Waters from Fine Coal Flotation
… in the flotation of fine coal. Diesel range organics (DRO) and polyaromatic hydrocarbons (PAHs) are measured in aqueous samples using gas chromatography equipped with either a flame ionization detector (GC-FID) or a mass spectrometer (GC-MS). Samples are subjected to a variety of test …
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Molecular Simulation Study of Oil Hydrocarbons, Dispersants and Other Organics in Atmospheric Air/Water Interfaces
The main objective of this dissertation is to study the interfacial properties of organic contaminants, in particular green leaf volatiles (GLVs), oil hydrocarbons [mainly intermediate-volatile organic compounds (IVOCs) and semi-volatile organic compounds (SVOCs)], as well as surfactant species …
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