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 13 of 13 for “"Chemical markers"”.
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Assessment of chemical markers as surrogates for efficacy and safety of Rooibos extracts
… system. The aim of this study was to identify chemical markers in green rooibos extract (GRE) that could predict bioactivity in cell-based assays, with particular focus drawn to the dihydrochalcone C-glucoside, aspalathin, which has displayed antidiabetic effects in vitro and in vivo. METHODS …
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DEVELOPMENT OF A CHEMICAL FINGERPRINT FOR DETECTING UNTREATED HUMAN SEWAGE POLLUTION IN SURFACE WATER
… This thesis studied anthropogenic markers to track untreated sewage in an urban watershed with separate storm sewer system, under dry weather conditions. The main feature of these chemical markers is their degradation behavior at municipal wastewater treatment plants: some markers …
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Hard and tough electrodeposited aluminum-manganese alloys with tailored nanostructures
… probe tomography. Implanted Ga ions are used as chemical markers for the amorphous phase; this method permits more robust phase identification and measurement of their compositions. Whereas uniform Mn distributions are observed in the single phase alloys, Mn is found to weakly partition into …
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CHARACTERIZATION OF SEPTIC SYSTEM WASTEWATER AND MUNICIPAL SOLID WASTE LANDFILL LEACHATE
… and domestic wastewater effluents and developed chemical tracers for septic system impacted streams. I used ultrahigh resolution, Fourier-transform ion cyclotron resonance mass spectrometry, to molecularly characterize the dissolved organic matter (DOM) of septic system wastewater and septic …
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Safety Assessment and Chemical Fingerprint Analysis of Medicinal Plants Commonly Consumed As Herbal Teas; Rooibos (<em>Aspalathus Linearis</em>) and Moringa (<em>Moringa Oleifera</em>)
… interaction on consumers and the quest for chemical markers for chemical fingerprinting development are provided. Rooibos tea (<em>Aspalathus linearis</em>) is a popular South African herbal tea enjoyed worldwide. Limited reports indicate the potential of rooibos tea to alter the activity of …
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Characterisation of the Microbial Community in Indoor Environments: a Chemical-Analytical Approach
… The study describes important capabilities of chemical marker analysis in defining human exposure to microorganisms in indoor environments. An integrated procedure is presented where gas chromatography - ion trap tandem mass spectrometry is used to determine chemical markers of gram-negative …
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Evaluation of Agents for the Suppression of Take-all of Wheat in Virginia in Greenhouse and Field Studies, and Characterization of Isolates of Gaeumannomyces graminis varieties
… and to evaluate the efficacy of mineral, chemical, and or biological agents for control, test promising agents in the field, and characterize Ggt isolates collected in Virginia. 'Jackson' soft red winter wheat seeds were planted in a Kempsville loam containing millet seed infested with Ggt …
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Organic Tracer Analyses and Receptor Modeling of PM2.5 in Fairbanks, Alaska
… area for PM2.5 by the US EPA. Previous chemical mass balance (CMB) studies have shown that the majority of the Fairbanks wintertime PM2.5 is from residential wood combustion. But these CMB studies also identified a relatively high fraction (up to 20%) of sulfate of unspecified origin. …
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Organic Tracer Analyses and Receptor Modeling of PM2.5 in Fairbanks, Alaska
… area for PM2.5 by the US EPA. Previous chemical mass balance (CMB) studies have shown that the majority of the Fairbanks wintertime PM2.5 is from residential wood combustion. But these CMB studies also identified a relatively high fraction (up to 20%) of sulfate of unspecified origin. …
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Method development for investigating chemical distributions in the nervous system using mass spectrometry imaging
Chemical heterogeneity is a fundamental property of multicellular organisms. Multiple classes of biomolecules exhibit complex spatial and temporal variations and interactions during different biological processes. One way to investigate this chemical diversity is to visualize biomolecule …
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Phytochemical and toxocological studies of some Botswanan plants used in traditional medicine
… of these plants are being investigated phytochemically and toxicologically. These include: Jatropha erythropoda Pax. (Euphorbiaceae), Cassia italica (E11. ) Lam. Ex. (Leguminosae), Asclepiasfruticosa L. (Asclepiadaceae), Albizzia brevifolia Schinz (Leguminosae), Argemone mexicana L. …
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Identification and characterization of potent odorants responsible for typical and storage-induced flavors of cola-flavored carbonated beverages
… two unidentified volatiles could be used as the chemical markers to indicate high temperature storage abuse.
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Taxonomical use of floral scent data in apomictic taxa of Hieracium and Sorbus derived from hybridization
… by morphology alone. Therefore, molecular or chemical markers are needed to investigate the parentage of such taxa and their collective species membership. An important starting point of this research was the finding that artificial hybrids of Citrus produce a combination of the leaf and peel …