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Showing 1 to 20 of 62 for “"methylmercury"”.
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Voltammetric and other properties of methylmercury compounds and distribution of methylmercury in environmental samples
<p>The reduction of aqueous methylmercury solutions has been studied using polarography and cyclic voltammetry at the dropping mercury electrode. By scanning a broad range of pH, pCl and methylmercury concentrations, a detailed reduction mechanism has been proposed. Reduction is shown to proceed in …
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Chronic methylmercury toxicosis in calves
Thesis (M.S.)--Michigan State University. Dept. of Pathology, 1971
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Modeling methylmercury in Maine's tribal meres
Methylmercury (MeHg) concentrations in the fish of twenty Maine lakes were projected for the year 2035 under three different policy scenarios. A mechanistic model of Hg fate and transport was calibrated for Maine's environment using four parameters: volumetric outflow rate, settling velocity, …
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Electrochemical Reduction of Methylmercury in Aqueous Solution
Made available in DSpace on 2014-12-10T23:01:36Z (GMT). No. of bitstreams: 1 7317555.pdf: 5390985 bytes, checksum: a95927a21b5a261c55cf2bcc9b2816a9 (MD5) Previous issue date: 1973
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Acute and subacute methylmercury toxicosis in the rat
Thesis (M.S.)--Michigan State University. Dept. of Pathology, 1971
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Self-caught fish consumption and methylmercury advisories in Tuscaloosa County, Alabama
Methylmercury is a naturally occurring toxin, capable of bioaccumulation within aquatic ecosystems. Diets high in fish with elevated levels of methylmercury can lead to neurological impairments, especially in young children. Low-income and minority anglers have been found to consume higher rates of …
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Communicating the risks and hazards of methylmercury to the Ojibwe population
… of fish containing high concentrations of methylmercury have been well documented, and demonstrate that the consumption of mercury-contaminated fish and other organisms can contribute to adverse human health effects. Native Americans of the Great Lakes region are one of the populations …
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Mechanisms of Microbial Formation and Photodegradation of Methylmercury in the Aquatic Environment
<p>Methylmercury is a bioaccumulative neurotoxin that severely endangers human health. Humans are exposed to methylmercury through consumption of contaminated aquatic fish. To date, effective strategies for preventing and remediating methylmercury contamination have remained elusive, mainly due to …
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Climate Change and Dissolved Organic Matter in Subarctic Lakes: Relevance to Methylmercury Bioavailability
One of the first steps of methylmercury (MeHg) bioaccumulation, uptake by phytoplankton, is regulated by dissolved organic matter (DOM). Methylmercury binds strongly with DOM, especially high-molecular weight (HMW) compounds containing reduced sulphur; this binding decreases MeHg bioavailability. …
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Geochemical controls on production and transport of methylmercury in the St. Louis River Estuary
The production of methylmercury (MeHg) in freshwater systems is a concern due to its bioaccumulative properties in aquatic food webs and potential neurotoxicity of consumers of fish, including predatory fish, wildlife, and humans. Transformation of inorganic mercury to MeHg is primarily driven by …
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Multiple Linear Model Selection: A Data Study on the Ecological Controls on Methylmercury Production
Data on methylmercury (MeHg) concentrations and other environment parameters was collected between 2006 to 2012 from wetlands in the prairie pothole region in Saskatchewan by members of the Department of Biology, University of Regina. My research goal was to use the Backward Elimination model …
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Motor and Cerebellar Effects in Rats Exposed to PCBs and Methylmercury During Early Development
Polychlorinated biphenyls (PCBs) and methylmercury (MeHg) are found in the same food sources, particularly fish and seafood, and recent studies suggest they may have additive or interactive effects on the nervous system. High doses of MeHg are known to target the cerebellum and impair balance and …
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Effects of Methylmercury Exposure on the Immune and Neurological Responses of Mice to Toxoplasma gondii Infection
… meats or by ingesting oocysts excreted by cats. Methylmercury (MeHg) is a well-documented neurotoxicant that accumulates in the brain and causes severe mental and visual dysfunction, including chronic encephalopathy. Consumption of contaminated fish, grains, and seeds are common sources of human …
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Altered DNA Repair, Antioxidant and Cellular Proliferation Status as Determinants of Susceptibility to Methylmercury Toxicity in Vitro
Methylmercury (MeHg) is a pervasive environmental contaminant with potent neurotoxic, teratogenic and likely carcinogenic activity, for which the underlying molecular mechanisms remain largely unclear. Base excision repair (BER) is important in mitigating the pathogenic effects of oxidative stress, …
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Effects of lake trophic state and seasonal cycling on production and bioaccumulation of methylmercury in Te Arawa Lakes
… vents. Mercury (Hg) and its organic derivative, methylmercury (MeHg), are highly toxic to both the environment and human health. Of particular concern is the ability of MeHg to bioaccumulate in aquatic food webs, leading to increased toxicity in higher trophic organisms. Given that fish …
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Toxic effects of dietary methylmercury on immune system structure, function, and development in the American kestrel (Falco sparverius)
… relevant concentrations of dietary methylmercury (MeHg) were assessed in adult non-breeding male kestrels, female kestrels during egg laying, and nestling kestrels. Immunological endpoints included cell-mediated immunity (CMI) using the phytohemagglutinin (PHA) skin-swelling assay …
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THE IMPORTANCE OF PHYSICAL MIXING AND SEDIMENT CHEMISTRY IN MERCURY AND METHYLMERCURY BIOGEOCHEMICAL CYCLING AND BIOACCUMULATION WITHIN SHALLOW ESTUARIES
The objective of this study was to examine, using mesocosm experiments, the long-term effects of sediment resuspension on the fate, transport, and bioaccumulation of Hg and MeHg in shallow ecosystems. A bioenergetic-based model including sediment resuspension was developed to assess MeHg …
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Exposure Assessment of Mercury in Fish from Kentucky Surface Waters
… fish were examined by KDEP and the quantity of methylmercury was determined in micrograms per kilogram (ppm). These data were used to estimate the exposure under various scenarios for methylmercury. Exposure assessment is a major component of the risk assessment process and is used here to …
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Cardiovascular effects of lead and mercury and their mixtures in rats
… of single exposure to lead, inorganic mercury or methylmercury on the cardiovascular system. Therefore, male Wistar rats were exposed to a broad range of doses of lead, inorganic mercury or methylmercury for four weeks through the drinking water. Cardiovascular health of the rats was assessed by …
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