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 498 for “"Arsenic"”.
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Total arsenic and arsenic speciation in indigenous food stuffs
… elemental speciation. This study evaluates the arsenic species found in a range of food stuffs together with growing environments and toxicity issues. Total arsenic concentrations in fish tissue and vegetable crops were determined by ICP-MS following microwave-assisted acid digestion using …
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Determination of Arsenic and Arsenic Species in Ombrotrophic Peat Bogs from Finland
… goal of this study was to evaluate how faithful arsenic (As) has been preserved in ombrotrophic peat bogs from Finland. The changing rates of atmospheric As deposition have been reconstructed using peat cores from three Finnish bogs: Harjavalta (Har), nearby a Copper (Cu) - Nickel (Ni) smelter, …
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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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Coupled arsenic, iron, and nitrogen cycling in arsenic-contaminated Upper Mystic Lake
… addresses the mechanisms controlling arsenic (As) remobilization and cycling in the hypolimnion of As-contaminated Upper Mystic Lake (UML; Winchester, MA). We conducted field and laboratory studies, and applied mass balance, surface complexation, and thermodynamic modeling to explore …
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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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Antihaemolytic action of arsenic
The foregoing experiments point to certain definite conclusions which may be summed up in a few words.
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The legacy of arsenic: Identification of arsenic exposure potential and negative health outcomes
Arsenic is a common element with a multitude of industrial, medicinal, and agricultural uses. It can also cause many negative health effects, including several forms of cancer, skin lesions, and cardiovascular disease. In Florida, residual levels of arsenic and other chemicals from various …
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The fixation of arsenic wastes
Arsenic has found widespread use as a component in a variety of formulations designed to control or eliminate a variety of insect and fungicidal pests. Arsenical wastes are also often produced during the extraction of metals such as copper, gold, nickel and tin. Consequently, there are large …
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Arsenic trioxide in ovarian cancer
Arsenic trioxide (As2O3) has shown anti-tumour activity against a variety of solid tumours in vitro. However, the mechanisms responsible for its cytotoxicity against ovarian carcinoma remain elusive. In this thesis, the molecular determinants of its effects and factors mediating its chemoresistance …
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Arsenic, antimony and visceral leishmaniasis
… resistance hypothesis is that exposure to arsenic in drinking water in this region has resulted in antimony-resistant Leishmania parasites.<br/>Leishmania donovani were serially passaged in mice exposed to environmentally-relevant levels of arsenic in drinking water. Arsenic accumulation in …
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Arsenic in the Aberjona watershed
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1992.
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A multidisciplinary investigation into arsenic contamination in rice : rice preparation, arsenic knowledge and risk perception
… route after water, for human exposure to arsenic (As) through the diet. Hence, awareness of As contamination in rice and use of mitigation techniques to reduce the As content of rice are vital. The Overall aim of this thesis was to determine the As contamination levels in cooked rice …
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Characterization of arsenic-binding siderophores from environmental bacteria and evaluation of their role in arsenic tolerance
Arsenic (As) is a toxic metalloid and the remediation of soils and waters from this contaminant as well as the prevention of future contamination are still pending tasks in Chile. There are bacteria able to live in environments polluted with arsenic, as they have tolerance mechanisms for this …
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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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