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 97 for “"Environmental Contaminants"”.
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ORGANIC ENVIRONMENTAL CONTAMINANTS IN FOOD
… to investigate the transfer of atmospheric contaminants into foodstuffs and living plants to develop transfer models to determine if infrequent sampling of air around the food chain is any measure of contamination reaching the consumer. The quantitative aspects of these studies were limited …
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ENVIRONMENTAL CONTAMINANTS IN FARM AND WILD ANIMALS
Environmental pollution poses significant risks to both human and animal health, needing a "One Health" approach to understand the complex interactions between ecosystems, human, animals, and contaminants. This thesis focuses on the environmental contaminants, specifically per- and polyfluoroalkyl …
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Muskrat populations in Virginia's Elizabeth River: influence of environmental contaminants
The influence of environmental contaminants on the muskrat population inhabiting the contaminated lower region of the Elizabeth River was studied through an analysis of contaminant burdens, physiological characteristics, and population dynamics in comparison to those of muskrat populations from a …
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Effects of Developmental Exposure to Environmental Contaminants on the Auditory System
… (PCBs) and methylmercury (MeHg) are ubiquitous environmental contaminants to which humans are exposed, primarily via consumption of contaminated fish and seafood. Developmental exposure to these contaminants can result in a variety of neurotoxic effects, including long-term auditory deficits. We …
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Evaluation and Comparison of Environmental Contaminants Present in Two Types of Swine Rearing Facilities
… association of this biological difference with environmental contaminants. Levels of total and respirable dust and endotoxin, carbon monoxide, carbon dioxide, ammonia, and temperature and percent relative humidity were measured in two types of swine rearing facilities: isolated nursery and …
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Additive Manufacturing Filled Polymer Composites for Environmental Contaminants: Material Extrusion Processing, Structure and Performance
… improved mechanical properties, interest in the environmental applications of AM has recently increased. The lower cost and greater accessibility AM is leading to novel environmental research solutions in wastewater treatment and toxicity reduction by capitalizing on the increased affordability …
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Detection of Environmental Contaminants in Water Utilizing Raman Scanning for E. coli Phenotype Changes
… a method to quickly and accurately detect contaminants in water samples through phenotype changes in E. coli measured through SERS. Contaminated Luria-Bertani (LB) media was inoculated with LB with an OD600 of 1, grown for two hours, and then dried on a flat piece of aluminum foil. These …
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Vibrational spectroscopy as a tool to investigate the effects of environmental contaminants in predatory birds
Predatory birds are vulnerable to contaminants in the environment due to their high trophic position and long lifespans. They are also important sentinel species so tools are needed to measure and monitor contaminants, not only to protect avian populations, but to confer protection to lower trophic …
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USE OF MICROALGAE FOR WASTEWATER TREATMENT AND BIOFUEL PRODUCTION: EFFECTS OF ENVIRONMENTAL CONTAMINANTS ON THE CELLULAR RESPONSE
… triacylglycerols. However, the presence of toxic contaminants in municipal or industrial wastewater could negatively affect the biomass growth and modify the pattern of lipid accumulation in algae cells. This research aims to evaluate the potential of cultivating microalgae in wastewater for the …
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Synchrotron X-Ray Diffraction and Piezospectroscopy used for the Investigation of Individual Mechanical Effects from Environmental Contaminants and Oxide Layer Undulations in Thermal Barrier Coatings
<p>The durability of Thermal Barrier Coatings (TBCs) used on the turbine blades of aircraft and power generation engines has been known to be affected by sand particle ingression comprised of Calcium-Magnesium-Alumina-Silicate (CMAS). Previous studies have shown that these effects present …
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The Development and Application of a Hemolytic Plaque Forming Cell Assay (PFC) and a Cytotoxic T-Lymphocyte Assay (CTL) in Tilapia (Oreochromis niloticus) for Immunotoxicity Risk Assessment of Environmental Contaminants
… immune parameters, then tested using fourteen environmental contaminants or drugs, ten of which are classified by the NTP as immunotoxic in rodents. Reduced antibody production via a decrease in plaque number was observed in response to exposure of tilapia to eight of the nine humoral …
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Gonadal histology and reproductive steroidogenesis of anurans exposed to potential endocrine disrupting contaminants
… incidences of malformation with the presence of environmental contaminants have raised questions about the effects of environmental contaminants on the development of larval amphibians. The potential endocrine disrupting effects of pesticides suggest that the reproductive and developmental …
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Subacute immunotoxic effects of the environmental contaminants 7,12-dimethylbenzanthracene (DMBA), hexachlorocyclohexane (lindane), and 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) on spleen and pronephros cellularity and morphology and functional activity of macrophages contained in these hematopoietic organs in the cichlid fish tilapia (<i>Oreochromis niloticus</i>)
… to non-overtly toxic levels of three different environmentally relevant chemicals, 7,12-dimethylbenzanthracene (DMBA), hexachlorocyclohexane (lindane), and 2,3,7,8- tetrachlorodibenzo-p -dioxin (TCDD). Each chemical agent was administered to tilapia in separate experiments by intraperitoneal …
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Role of Aryl Hydrocarbon Receptor in Circadian Rhythm: A Novel Pathway to Dioxin Toxicity
… on its role in mediating adverse effects of some environmental contaminants, such as 2,3,7,8-tetrachlorodibenzo- p-dioxin (TCDD). However, a physiological role of AhR remains unknown. Many members of PAS domain family play a role in regulation of circadian rhythm; therefore the role of AhR in the …
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A Rhapsody on the Aryl Hydrocarbon Receptor: Molecular and Environmental Health Insights Through Novel and Canonical Signaling Pathways
… persistent, potent, and commonly encountered environmental contaminants. As such, we have investigated the specific role of the AhR in cellular replication during liver regeneration. Based on our findings, we then set out to assess transcriptional targets of the AhR in the mouse liver …
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Characterization of serum-induced CYP1A1 expression and activity in mouse embryo fibroblasts
… factor that mediates the toxic effects of environmental contaminants that include TCDD. Using a TCDD dose-response treatment in MEFs, we observed a super induction of CYP1A1 with newborn calf serum (NCS) in the presence (10nM/15nM) of TCDD. In addition to NCS, fetal bovine serum (FBS) also …
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Determining The Occurrence, Fate, And Effects Of Pesticide Mixtures Using The Aquatic Amphipod Hyalella Azteca
… United States Geological Survey have shown that environmental contaminants rarely occur as single compounds but, rather, as mixtures. In aquatic ecosystems, mixtures of these compounds are often complex, sometimes containing dozens of compounds across a number of different chemical classes. …
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IMPROVING CANNABIS SATIVA'S PHYTOREMEDIATION CAPABILITIES OF FOREVER CHEMICALS THROUGH MICROBIAL INOCULATIONS
… polyfluoroalkyl substances (PFAS) are persistent environmental contaminants that pose ecological and human health risks due to their resistance to degradation and potential for bioaccumulation. Phytoremediation has emerged as a potential strategy for mitigating PFAS contamination, and …
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