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 “"metal exposure"”.
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Caracals as sentinels for metal exposure in a human-transformed landscape
… activity release large quantities of metallic elements and metalloids into the environment. Due to their toxicity, environmental persistence and bioaccumulative nature, these chemical pollutants threaten wildlife and human health. As urbanisation increases and top predators are forced …
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Investigating metal exposure on the general populace of the copper mining town of Kitwe, Zambia
… mining contributes to significant elevated metals in the environment, hence increasing the risk of metals exposure to human populations living in and around mining areas. Recent research has focused on the environmental impact of copper mining byproducts such as lead, cadmium, copper, cobalt …
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Metal exposure in non-occupationally exposed pregnant women of Western Australia and contribution of environmental sources
Metals pollution is a growing global concern and human exposure has been associated with increased chronic and acute health effects even at low metal concentrations (Hu et al., 2006; US EPA, 2007; Rice et al., 2010; UNEP, 2010). Sensitive members of the population, such as neonates, children and …
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The influence of ultraviolet-B radiation on benthic communities in Rocky Mountain streams with different metal exposure histories
… organic carbon, high elevation) that increase exposure of benthic communities to UVB (280 to 320 nm) provide an opportunity to examine how UVB interacts with metals contamination to structure benthic communities. I integrated a series of UVB addition experiments conducted in stream microcosms …
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Preliminary Assessment: Identification of Chinese Drywall and Exposure to Particulate Matter and Metals during Cutting and Installation of Drywall
… two parts. First part presents an analysis of metals like strontium for the identification of Chinese drywall, and a comparison of strontium concentrations of American drywall and Chinese drywall using XRF (X-Ray Fluorescence) analysis with the Innov-X XRF analyzer. The second part presents an …
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Lead exposure in large carnivores in the greater Yellowstone ecosystem
Exposure to heavy metals is a potential challenge to the conservation of wildlife. One source of heavy metal exposure known to negatively affect avian wildlife is ingestion of lead rifle bullet fragments found in discarded hunter-harvested ungulate gut piles. Some large mammalian carnivores, such …
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Lead exposure in large carnivores in the greater Yellowstone ecosystem
Exposure to heavy metals is a potential challenge to the conservation of wildlife. One source of heavy metal exposure known to negatively affect avian wildlife is ingestion of lead rifle bullet fragments found in discarded hunter-harvested ungulate gut piles. Some large mammalian carnivores, such …
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The resistance of three aquatic insect detritivores to fly ash constituents
… (fly ash particulates, pH excursions and heavy metals) in three species of stonefly nymphs (Plecoptera), Tallaperla maria, Pteronarcys dorsata and Pteronarcys proteus were investigated in laboratory and field located bioassays. Fly ash particulates were non-toxic to the three species. All three …
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Impacts of wildfire activity in the wildland-urban interface on environmental mobilization and bioaccessibility of nanoscale trace metals, The
… matter, water contamination, and trace metal enrichment. However, less is known about the biogeochemical impacts of WUI wildfires. Given that structures are concentrated sources of metals (wiring, paints, treated wood, electronics, etc.), there is a growing need to characterize ash …
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Bioaugmentation with metal-resistance microorganisms in the remediation of metal and organic contaminated soils
… sites (i.e., sites with both organic and metallic pollutants) are difficult to bioremediate because the metal toxicity is such that organic degradation is inhibited. The objective of this research was to evaluate the potential of bioaugmentation with metal-detoxifying microbial populations …
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The use of lipid profiles from immobilised selenastrum capricornutum in the biological surveillance of freshwaters
… investigated as a potential indicator of heavy metal pollution in freshwater environments. The toxicity of Cu", Zn 2 and Cd2t on algal growth was determined and the effective concentration inhibiting specific growth rate by 50 % (EC5 0) for each metal was found to be 124 pM Cu, 20 pM Zn and 5.7 …
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The in vivo effects of copper, manganese and mercury mixtures on the heart, lung and brain and the coagulation system in the Sprague-Dawley rat model
… are the main sources of the increased heavy metal concentrations in the environment, including water. Drinking or the use of contaminated water can have harmful effects on human health contributing to cardiovascular, respiratory and neurodegenerative diseases. There is some data on the …
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Cellulolytic responses to heavy metal accumulation in Corbicula fluminea and Mudalia dilatata
… and paired) were investigated in 30-day exposures. Exposures were conducted in both laboratory and field-oriented artificial streams and then validated in the river receiving system of a power plant. Cellulolytic activity was reduced by laboratory and field exposures to cadmium and zinc …
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Low Level Lead Exposure and Postural Balance in Children
Background: The detrimental effects of lead exposure have been well documented. In children, it is linked to a decrease in IQ, damage to the nervous system, behavioral problems, slowed growth and poor neuromotor skills. It has been suggested there is no safe level of lead exposure.Objectives: The …
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An Evaluation of exposures to respirable particulates, environmental PM2.5, PAHs and metal compounds in Western Australia
… This study investigated the relationship between exposure to air pollutants and potential biomarkers of health effects. The research project was conducted in 2 separate study locations and cohorts. Study 1: An Evaluation of Children’s Exposures to Respirable Particulates, Environmental PM2.5, PAHs …
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Application of NMR-based metabolomics techniques to biological systems: a case study on bivalves
… also applied to study the effect of short-term exposure to heavy metals on two different clams’ species: Ruditapes decussatus (Linnaeus, 1758) and Ruditapes philippinarum (Adams & Reeve, 1850). Heavy metals are considered to be among the most harmful pollutants that can contaminate marine …
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Early life exposure to metals and adolescent neurodevelopment
… industry sites, are commonly exposed to multiple metals including lead and manganese. These metals are associated with adverse neurodevelopmental outcomes, with evidence of non-linear associations for essential metals. Metals target brain regions involved in cognition and motor function. However, …
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Evaluation of approaches for the derivation of defensible sediment quality guidelines for application at Saskatchewan uranium operations
… the potentially bioavailable fractions of metals in sediment which could become an alternative measurement to the typically used total metal concentrations. The screening-level concentration (SLC) approach has been used in Ontario, Canada, to derive lowest effect levels (LELs) and severe …
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Development of a rapid screening technique for contaminants in environmental monitoring and regulation
… to assess the concentration of phosphorus and metals qualitatively and quantitatively. Firstly, a rapid detection technique for phosphorus based on Metsorb DGT devices and a colour imaging method using the conventional molybdenum blue were developed and fully tested under different conditions. …
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