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 18 of 18 for “"inorganic arsenic"”.
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Mitigation of Inorganic Arsenic in Rice
Arsenic and its inorganic compounds are classified as class one non-threshold carcinogen. Arsenic’s main route in to the human body is by ingestion of rice, as rice is the staple diet of over half the world population. Here I present results from global survey of market available polished white …
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Differential Cytotoxicity and Reactive Oxygen Species Generation in Pulmonary and Aortic Cells Exposed to Inorganic Arsenic and Monomethylarsonous Acid
Chronic ingestion of arsenic (As), a common ground water contaminant, has demonstrated to result in numerous deleterious health outcomes including black foot disease, various cancers, and hyperpigmentation. Chronic arsenic ingestion has also been associated with the development of atherosclerosis …
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Measurement of inorganic arsenic and chromium species in southern Nevada groundwater using ion chromatography-inductively coupled plasma mass spectrometry
… plasma mass spectrometer were used to separate inorganic arsenite from arsenate and trivalent from hexavalent chromium in southern Nevada groundwater. Method detection limits were found to be 0.011 ppb and 0.005 ppb for arsenite and arsenate respectively, and 0.015 ppb and 0.02 ppb for trivalent …
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Rice preparation for cadmium and arsenic reduction while maintaining a healthy microbial load
… and nephrotoxin cadmium and the carcinogen inorganic arsenic. As rice is a dietary staple, this makes rice production highly problematic. Thus, if cadmium and inorganic arsenic can be reduced in rice, even in rice based processed products such as flour, as opposed to rice grain, per se, then …
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Arsenic in the Pak Pa-Nang River Basin, Thailand
… the presence of arsenopyrite gives rise to high arsenic concentrations, mobilized during past mining activity. Suitable techniques have been developed, for the extraction of arsenic species in a variety of environmental and biological samples. Trypsin and cellulase enzymatic extraction procedures …
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A 450K arsenite-binding protein of the rabbit liver cytosol
Inorganic arsenic administered to animals is primarily associated with liver cytosolic macromolecules. The specifics of this binding and its role in arsenic toxicity have never been fully examined. This dissertation concentrated on determining the species of inorganic arsenic which binds to liver …
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Colorimetric determination and speciation of arsenic with silver diethyldithiocarbamate
… technique for the determination of aqueous arsenic. The chemistry of the process is discussed in detail, and the method is compared to the other Environmental Protection Agency approved arsenic methods. Original modifications to the apparatus, allowing a more efficient reaction initiation …
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Single cell gel electrophoresis-based investigations of UVR- and visible light-induced single strand breakage in cultured human cells
… properties, in the cells tested at least. Inorganic arsenic (V) was observed to inhibit single strand break repair and the religation of repair-related excised lesions. Arsenic-induced crosslinking and the excision of the crosslinked lesions were observed. The Area Moment, a new parameter …
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Arsenic and other trace elements in Bangladeshi food and non-food and their relationship to human health
… that over 30 million people are exposed to arsenic from drinking contaminated groundwater in Bangladesh. Furthermore, due to the use of contaminated water for irrigation purposes, arsenic and other toxic elements are entering the food chain of Bangladeshis. In this thesis, the total levels …
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Behavioural ecotoxicology of the brown shrimp, Crangon crangon : changing colour in polluted environments
… [Gentamicin (Gt) and Furazolidone (FZN)] and arsenic (As). A great interindividual and interpopulation variability in response to the use of heavy metals and antibiotics was found. Therefore, colour change ability in the brown shrimp is not a sensitive behavioural ecotoxicological marker to …
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Arsenic Speciation in Food
… , arsenite and arsenate. Using this coupling, arsenic species in fruit and vegetables grown on soils containing up to 1.4% w\w arsenic have been surveyed and DMAA, MMAA, arsenite and arsenate identified in the plants. Although extraction efficiencies were poor, typically 10%, total arsenic …
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Effects of sulfur complexation on intestinal transport and toxicity of metalloids in cell cultures
Arsenic is a common poison and is classified as human carcinogen. Selenium is an essential nutrient, but is highly toxic when applied in high concentrations. The cytotoxic potential of both metalloids is modified when they form sulfur-containing complexes. For arsenic compounds, only some data …
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Insights on the reactivity of environmental iron-containing nanoparticles.
… size of precursor ferrihydrite nanoparticles. Inorganic arsenic species are carcinogenic and due to the affect on human health, high concentrations of arsenic in some groundwater systems have led to the study of arsenic's geochemical cycling. Arsenic has a high adsorption affinity for iron …
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Estuaries as Sources of Methylated Arsenic to the North Sea
… techniques were developed for the detection of inorganic arsenic (As(III) and As(V)), monomethylarsenic (MMA) and dimethylarsenic (DMA) in water, pore waters, suspended particles and bed sediments of the Humber Estuary, Thames Estuary and the southern North Sea. Dissolved inorganic As in the …
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Analytical methods to investigate occupational exposure to toxic elements and their species
… are of a carcinogenic occupational concern, i.e. inorganic arsenic, hexavalent chromium and respirable crystalline silica (RCS). Current biological monitoring methods are either no longer deemed fit for purpose (arsenic), not ideal (chromium) or are not available (RCS). The limitations of …
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Arsenic Analysis: Comparative Arsenic Groundwater Concentration in Relation to Soil and Vegetation
<p>Arsenic (As) is a toxic semi-metallic element found in groundwater, soils, and plants. Natural and anthropogenic sources contribute to the distribution of arsenic in the environment. Arsenic’s toxic and mobile behavior is associated with its speciation ability. There are two types of arsenic …
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Management strategy of landfill leachate and landfill gas condensate
… alternatives for organic contaminant and arsenic removal efficiency. Sequencing batch reactor (SBR) showed effectiveness for the degradation of organic matter, even in an environment containing high levels of arsenic. This indicated a relatively low toxicity of organic arsenic as compared …
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Environmental Arsenic Exposure and Risk of Cardiovascular Disease
Background: Environmental exposure to inorganic arsenic (iAs), one of the most abundant elements in the earth’s crust, is widely recognised as a major global health risk – millions of people are estimated to be chronically exposed to arsenic worldwide. Yet, compared to arsenic-related cancer and …