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Showing 1 to 20 of 67 for “"Radium"”.
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An economic study of the radium industry
Thesis: M.S., Massachusetts Institute of Technology, School of Industrial Management, 1959
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Determination of radium-226 in drinking water by alpha spectroscopy
A radiochemical procedure for determination of radium-226 (Ra-226) in drinking water was developed. The method involves concentrating radium by coprecipitation with barium sulfate; separating radium from barium and other alkaline earth metals by ion exchange; and electrodepositing radium onto …
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Radium cycling in groundwater : implications for bioremediation and tracer studies
Radium (Ra) is a radioactive alkaline earth element and forms naturally from the decay of uranium (U) and thorium (Th), elements that are ubiquitous within most rocks, soils and sediments. Radium contamination associated with anthropogenic activities such as hydraulic fracturing, uranium mining, …
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An Experimental Study of the Attachment of Radium a to Monodispersed Aerosols
Made available in DSpace on 2014-12-14T06:26:07Z (GMT). No. of bitstreams: 1 7915362.pdf: 3417006 bytes, checksum: 996f8e9a58e49ceff5b0f12606970877 (MD5) Previous issue date: 1979
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Radium isotopes as tracers of coastal circulation pathways in the Mid-Atlantic Bight
… across this crucial ocean boundary. The four radium isotopes, with half-lives of 4 days to 1600 years, a coastal source, and conservative properties in seawater, were used as coastal water mass tracers. The final study was comprised of data from 5 cruises, with a total of 8 cross-shelfbreak …
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Bone Cancer Incidence in Texas Counties With Elevated Radium Content in Drinking Water
… in drinking water. The radionuclide present is radium which deposits in bone tissue and emits alpha particle radiation when it decays. Radium dose and carcinogenesis has been carefully researched in the cases of radium dial painters and patients who were administered radium nostrums and potions. …
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Radium isotopes as tracers of coastal circulation pathways in the Mid-Atlantic Blight
… across this crucial ocean boundary. The four radium isotopes, with half-lives of 4 days to 1600 years, a coastal source, and conservative properties in seawater, were used as coastal water mass tracers. The final study was comprised of data from 5 cruises, with a total of 8 cross-shelfbreak …
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Medical Isotope Production of Actinium 225 By Linear Accelerator Photon Irradiation of Radium 226
… accelerator or LINAC) to irradiate a sample of Radium-226 (half-life 1600yrs). The photo-neutron reaction liberates neutrons from Ra-226 atoms leaving behind Radium-225 (half-life 14.7 days). Ra-225 decays naturally through beta emission to Ac-225. Previous research demonstrated it is possible …
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Radiobiological mechanisms and novel imaging biomarkers in metastatic prostate cancer treated with radium-223
… targeted radionuclide therapies, in particular radium-223.<br/><br/>Radium-223 is a targeted α-therapy, which several clinical trials have shown not only to have a palliative benefit but also to improve overall survival of mCRPC patients with bone metastases. The clinical utility of radium-223 …
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Radium isotopes and radon-222 as tracers of sediment-water interaction in Arctic coastal and lacustrine environments
… and degradation, and mineral weathering. Radium isotopes (223Ra, 224Ra, 226Ra, 228Ra) and radon-222, naturally occurring radioactive isotopes produced in sediments, are well-suited as tracers of nutrients, trace metals, and organic matter cycling processes at the sediment-water interface. …
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Mobilité, disponibilité et réactivité du radium au sein des sédiments de la rivière Kennebecasis au Nouveau-Brunswick
… aux teneurs et à l'accessibilité chimique de radium-226 au sein des sédiments de la rivière kennebecasis. Pour ce faire, il s'avère néessaire de disposer d'une méthode d'analyse fiable et rapide de ce dernier dans des matrices complexes comme le matériel sédimentaire. C'est dans ce contexte …
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Radium isotopes and radon-222 as tracers of sediment-water interaction in Arctic coastal and lacustrine environments
… and degradation, and mineral weathering. Radium isotopes (²²³Ra, ²²⁴Ra, ²²⁶Ra, ²²⁸Ra) and radon-222, naturally occurring radioactive isotopes produced in sediments, are well-suited as tracers of nutrients, trace metals, and organic matter cycling processes at the sediment-water interface. …
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Predictor Modeling of Naturally Ocurring Radium In Private Residential Drinking Water Wells of the Inner Coastal Plain of South Carolina
<p>Radium is a naturally occurring contaminant found in drinking water in South Carolina that can potentially be detrimental to human health. The purpose of this assessment is to evaluate water quality, with respect to radium concentrations, in private residential wells located within the inner …
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Détermination des teneurs en radium-226 par spectrométrie de masse dans la chair et la coquille de l'huître américaine (crassostrea virginica) du Nouveau-Brunswick, Canada
… une nouvelle méthode d’analyse robuste du radium par spectrométrie de masse dans la chair et dans la coquille de l’huître.... Cette thèse de maîtrise est rédigée sous forme d'une thèse par article. La problématique environnementale du radium est présentée tout comme les défis actuels …
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Radium isotopes as tracers of boundary inputs of nutrients and trace elements to the coastal and open ocean
… of these elements are poorly constrained. Radium isotopes are well suited to studying inputs of elements from ocean margins because they are produced in sediments and soluble in seawater. The half-lives of the four isotopes (223Ra, 224Ra, 228Ra, 226Ra) range from days to thousands of years, …
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Radium isotopes as tracers of boundary inputs of nutrients and trace elements to the coastal and open ocean
… of these elements are poorly constrained. Radium isotopes are well suited to studying inputs of elements from ocean margins because they are produced in sediments and soluble in seawater. The half-lives of the four isotopes (223Ra, 224Ra, 228Ra, 226Ra) range from days to thousands of years, …
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Radium and mercury dynamics in the Arctic: investigating terrestrial inputs, groundwater discharge, and chemical cycling in a changing climate
… Tracers of boundary inputs, such as the radium (Ra) isotope quartet, offer potential for tracking and quantifying riverine and submarine groundwater discharge (SGD) of species like Hg into the Arctic Ocean. This thesis employs seasonal data and laboratory experiments to investigate the …
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