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 21 for “"chemical extraction"”.
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An Integrative Approach to Evaluating Radiocesium Contamination in Fukushima Prefecture
… a Cs<sup>+</sup>-capturing ligand to develop a chemical extraction method that can be used to restore contaminated soil in Fukushima Prefecture. Results have shown a strong adsorption mechanism exhibited by Cs<sup>+</sup> to vermiculite services with no true interlayer collapse. The …
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The localization, function and applications of the stress response protein Hsp12p in the yeast Saccharomyces cerevisiae
… epifluorescent microscopy and confocal imagery. Chemical extraction revealed that Hsp12p was present in the cell wall while fluorescent imagery was not conclusive. This fluorescent Hsp12p construct was later employed in a novel application to sense the stress status of yeast, which bears future …
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Evaluating the Use of Modified Corn Distillers Grains as a Fish-meal Protein Replacement in Yellow Perch Perca flavescens
… processing methods including: fermentation, chemical extraction (CE), and mechanical fractionation (MF). A second trial evaluated HP-DG’s produced through solid state and submerged fermentation processes on both DWG and DDGS substrates. Apparent digestibility of HP-DG’s top performers was …
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Identification, Characterization, and Speciation of Rare Earth Elements in Coal Refuse
… coal refuse. During this study, physical and chemical characterization was conducted on coal refuse samples to understand characteristics, which influence REE phase designation. Experimental methods were chosen to specifically evaluate REE content and speciation across four key …
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The gallbladder epithelium in experimental cholelithiasis
… and transmission electron microscopy, and by chemical extraction and analysis of the monosaccharide radicles of the soluble glycoproteins. In all three models, a progressive increase in histochemical staining reaction in the epithelial cells was observed and commenced at a time before stones …
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Tracking diet and movement of Atlantic bluefin tuna (Thunnus thynnus) using carbon and nitrogen stable isotopes
… can affect isotope analyses of bulk tissue. Both chemical and mathematical corrections were used to address lipid effects on ABFT and the prey. All chemical extraction methods altered nitrogen isotope values. Mathematical corrections closely replicated chemically extracted carbon values while …
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Modeling Groundwater Denitrification by Ferrous Iron Using PHREEQC
… studies mainly because of two reasons: 1) the geochemical evidence for ferrous iron is more difficult to decipher due to the precipitation of Fe(III)-oxyhydroxides from the aqueous solution. 2) in the event when denitrification by both Fe(II) and organic carbon gave rise to precipitating reaction …
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Meteoric 10Be as a Tracer for Subglacial Chemical Weathering in East Antarctica
Subglacial chemical processes in Antarctica are potentially significant contributors to global geochemical cycles, but current understanding of their scale and nature is limited. A sequential chemical extraction procedure was developed and tested to investigate the utility of meteoric 10Be as a …
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The pre-treatment and pyrolysis of biomass for the production of liquids for fuels and speciality chemicals
… known as bio-oil], which contain a number of chemicals. The pyrolysis liquid can be used as a fuel, can be produced solely as a source of chemicals or can have some of the chemicals extracted and the residue used as a fuel. There were two primary objectives of this work. The first was to …
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Computer vision and deep-learning tools for automatic data extraction from chemical reaction schemes
… an artificial intelligence tool for image-mining chemical reaction schemes. In particular, the aim of this work is the development of an autonomous, high-throughput tool for converting visual data into machine-readable formats. Data extracted in this manner can be used for the creation of …
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Chemical speciation and spatial distribution of heavy metals and their adsorption onto sediments of the Berg River, Western Cape, South Africa
… zone in the country. In this study, the chemical speciation of heavy metals in the river sediment was determined in order to evaluate the extent of pollution. Chemical speciation using sequential chemical extraction of sediment samples was used to measure the mobility and bioavailability …
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Fundamental Understanding of NOx Sequestration Capacity And Pathways in Nano-TiO2 Engineered Cementitious Materials
… cements and are likely due to differences in chemical composition and hydrated cementitious phases. For TiO2-coated cementitious materials, the inclusion of a hydrophobic SiO2 layer improves the bonding between the TiO2 coating and the cementitious substrates but compromises the photocatalytic …
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Terminalia ivorensis and human health: the impact of Terminalia ivorensis on biomarkers of cyto- and genotoxicity in human cells in vitro.
… of solvent, season and storage time on the phytochemical profile of TI, and to search for potential safer treatment options for cancer by determining the impact of TI on biomarkers of cyto- and genotoxicity in human colon and liver cells in vitro. Fresh TI samples were collected in the dry and …
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Numerical and Experimental Analysis of the Effect of Faults in Open-Pit Mining Stability
… expedite the mining process by increasing the chemical extraction, but also increase the stability of the heap by unclogging drains.
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Municipal Solid Waste Incineration (MSWI) Ash Characterization and Physical Concentration
… study of this thesis investigated the physical, chemical, and mineralogical characterization of MSWI-BA samples through a number of experiments. To develop a proper physical characterization of the BA material, the sample was ground and subjected to particle size distribution, wet magnetic …
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Use of stable isotopes to assess phytoremediation of soils contaminated with cadmium and zinc.
… covering the soil with uncontaminated soil, extraction with acids or chelates) whilst others provide only short term solutions (e. g. reduction of metal bioavailability by liming or adding organic matter). An alternative approach is the use of hyperaccumulator plants to remove the heavy …
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Structure and Reactivity in Nanostructured Ionic Solvents
… ILs and DESs fundamentally differ in their chemical nature since ILs are pure liquid salts whereas DESs are mixtures. Like ILs, DESs that contain at least one sufficiently amphiphilic component can form bicontinuous nanostructures consisting of polar and non-polar domains. The ability of …
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Unlocking the Rare Earth Elements Potential of Allanite: A Comprehensive Study of Beneficiation and Leaching
… studies on allanite processing and REE extraction remain scarce. To date, allanite has mostly been treated as a secondary mineral enriched alongside primary REE minerals, rather than processed independently. This dissertation presents a systematic and comprehensive investigation into the …
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Evaluation of approaches for the derivation of defensible sediment quality guidelines for application at Saskatchewan uranium operations
… Metal concentrations in extracts from single extractions with either potassium phosphate or hydrochloric acid on wet and dried sediment, pore-water, and whole-sediment were used to evaluate metal bioaccumulation in test organisms. Depending on the metal, pore-water isolated using peepers …
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