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 57 for “"Bioaccessibility"”.
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Bioaccessibility of metals in Toronto city parks
The purpose of this work was to estimate metals bioaccessibility in soil samples from 15 city parks in Toronto, Ontario, Canada. Total metals concentrations were analyzed to identify contaminants that exceeded the Canadian Council of Ministers of the Environment (CCME) guidelines for …
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Bioaccessibility of metals in soils in selected parks in Montreal
… study was to determine the concentrations and bioaccessibility of metals in Montreal city parks. Surface soil samples were collected from nine parks located across Montreal city and analyzed for total metals, pH, carbon content and bioaccessibility. Metal concentrations were below the Canadian …
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Bioaccessibility of metals in city park soils - city of Edmonton
… Thus, a good understanding of soil ingestion and bioaccessibility has implications for the environmental management of urban parks. To this effect, this thesis focuses on heavy metals bioaccessibility in urban landscapes using the City of Edmonton as a case study. Total metal concentrations in …
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Microplastics as Contaminant Vectors: Influencing the Bioaccessibility of Naphthalene from Freshwater
… the sorption mechanisms of naphthalene and its bioaccessibility (i.e., an estimate of the fraction of an ingested dose that becomes soluble in gastro-intestinal fluids). Three types of MPs, medium-density polyethylene (MDPE), polypropylene (PP), and polystyrene (PS), were selected as model …
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Bioaccessibility of Metals in Soils of Parks and Playgrounds – Fort McMurray, Alberta
This study assessed the concentration and bioaccessibility of metals present in soils at parks and playgrounds in Fort McMurray, Alberta. Sixty soil samples collected from 20 parks and playgrounds were analyzed for pH, total metal concentration by X-ray fluorescence. In addition, in vitro …
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Bioaccessibility and metabolism of anthocyanins: effects of fermentation, encapsulation, and microbiota interactions
… benefits; however, these compounds exhibit low bioaccessibility and bioavailability due to degradation and limited absorption in the gastrointestinal tract, which may restrict their effects. Therefore, innovative strategies to enhance the stability and maximize the benefits of anthocyanins are …
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Understanding the Influence of Zinc on Grain Cadmium Accumulation and Bioaccessibility in Rice
… on cadmium, zinc, and essential mineral bioaccessibility in three lines of rice that differ in grain cadmium concentration </strong></p> <p>Diets high in cadmium (Cd) and low in zinc (Zn) threaten human health. While both are detrimental to the well-being of millions globally, diets …
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Metal bioaccessibility of soils in urban parks in Fredericton and Saint John, New Brunswick
… research was to determine the concentrations and bioaccessibility of metals in urban playground soils in the province of New Brunswick. Ten parks each were selected for sampling in Fredericton and Saint John, and a duplicate sample was taken from one park in each city. Metal bioaccessibility was …
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The impact of plant root biomass on the biodegradation and bioaccessibility of hydrocarbons in soil
… within root exudates on the biodegradation and bioaccessibility of phenanthrene from soil with particular interest in the study of root-induced changes of hydrocarbon bioaccessibility. Results showed that microbial catabolism and biodegradation of 14C-phenanthrene can be promoted by the …
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Characterization of antioxidant activities of soybeans and assessment of their bioaccessibility after in vitro digestion
… or nutraceutical products processed for better bioaccessibility of soybean bioactive components.
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Comparative Assessment of Phenolic Bioaccessibility and Bioavailability from 100% Juice and Whole Fruit – A Preclinical Approach.
North Carolina State University Theses Food, Bioprocessing and Nutrition Sciences.
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Concentrations and In Vitro Bioaccessibility of Metals in Soils at Urban Green Spaces in Toronto, Ontario
… spaces within the City of Toronto. In vitro bioaccessibility was determined in eight of the samples as a surrogate for bioavailability. The mean concentrations of metals of interest, As, Cr, Cu, Ni, Pb, and Zn were below the Canadian Council of Ministers of the Environment (CCME) soil quality …
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Investigation of how oral bioaccessibility of potentially toxic elements in urban soils is affected by contaminant source and sampling techniques
… in unnecessary remediations. Therefore, in vitro bioaccessibility tests are applied to estimate the bioavailable contaminant fraction providing more precise information.<br/><br/>However, the controlling factors over PTEs bioaccessibility in urban soils are not adequately understood. This research …
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An investigation of the distribution, fractionation and bioaccessibility of potentially toxic elements in urban soils of Lagos, Nigeria
… BCR sequential extraction, and the simplified bioaccessibility extraction test (SBET) were applied to the soils. The analytes Cr, Cu, Fe, Mn, Ni, Pb and Zn were determined in soil extracts and digests by ICP-MS.Mean pseudototal PTE concentrations at locations remote from point sources of …
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Spatial and statistical analysis approaches to investigate the oral bioaccessibility of potentially toxic elements in Northern Irish soils
… fraction of a soil contaminant. Measuring oral bioaccessibility in vitro can be an acceptable estimate of contaminant oral bioavailability, eliminating the need for in vivo toxicology studies to estimate health risks from oral soil contaminant exposure.<br/><br/>Using soil samples from the …
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Microstructural changes and micronutrient bioaccessibility in soft-solid foods, using a model fresh cheese and in vitro digestion
… parameters, and its relationship with the bioaccessibility of liposoluble vitamins through in vitro digestion. There were two specific aims to accomplish the overall objective. The first aim was to evaluate the structure and microstructure of the soft solid matrix, using a model fresh …
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Adaptation of an Existing In Vitro Digestion Model for High Throughput Phenolic Bioaccessibility Phenotyping within Cultivated (Highbush) Blueberry Varieties.
North Carolina State University Theses Food, Bioprocessing and Nutrition Sciences.
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Characterizing the Binding Potential, Activity, and Bioaccessibility of Peroxisome Proliferator Activated Receptor Gamma (PPARγ) Ligands in Indoor Dust
… it is essential that one also investigates the bioaccessibility and bioactivation of these chemicals following ingestion. </p><p> In the first research aim of this thesis, the bioaccessibility and bioactivation of several important SVOCs in house dust was investigated. To accomplish this, Tenax …
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Impacts of wildfire activity in the wildland-urban interface on environmental mobilization and bioaccessibility of nanoscale trace metals, The
… the environmental lability and pulmonary bioaccessibility of ash from structures burned in the Marshall Fire, a WUI wildfire that burned over 1000 structures in Boulder Country, Colorado. Exposure to WUI ash impacts a range of people, including first responders and residents. In the first …
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