Concentrations of arsenic and other trace elements in groundwater were examined at three villages... more Concentrations of arsenic and other trace elements in groundwater were examined at three villages (PT, POT and CHL) in the Kandal Province of Cambodia. Concentrations of arsenic in the groundwater ranged from 6.64 (in POT village) to 1543 microg/L (in PT village), with average and median concentrations of 552 and 353 microg/L, respectively. About 86% out of fifteen samples contained arsenic concentrations exceeding the WHO drinking water guidelines of 10 microg/L. Concentrations of arsenic (III) varied from 4 (in POT village) to 1334 microg/L (in PT village), with an average concentration of 470 microg/L. In addition, about 67%, 80% and 86% of the groundwater samples had higher concentrations for, respectively, barium, manganese and lead than the WHO drinking water guidelines. These results reveal that groundwater in Kandal Province is not only considerably contaminated with arsenic but also with barium, manganese and lead. A risk assessment study found that one sample (PT25) had a cumulative arsenic concentration (6758 mg) slightly higher than the threshold level (6750 mg) that could cause internal cancer in smelter workers with chronic exposure to arsenic from groundwater. High cumulative arsenic ingestion poses a health threat to the residents of Kandal Province.
Abstract Volume data sets resulting from, eg, computerized tomography (CT) or magnetic resonance ... more Abstract Volume data sets resulting from, eg, computerized tomography (CT) or magnetic resonance (MR) imaging modal-ities require enormous storage capacity even at moderate resolution levels. Such large files may require compres-sion for processing in CPU memory which, ...
Colloids and Surfaces A-physicochemical and Engineering Aspects, 2011
Magnetic heating effect of Fe3O4 ferrofluids, surface-carboxylated and encapsulated by poly(styre... more Magnetic heating effect of Fe3O4 ferrofluids, surface-carboxylated and encapsulated by poly(styrene-acrylic acid) was studied. Magnetic Fe3O4 NPs were synthesized by coprecipitation method and characterized by X-ray diffraction (XRD), Field Emission Electron Microscope (FESEM) and Vibrating Sample Magnetometer (VSM). Spectroscopic data (Infra red (IR) and Proton Nuclear Magnetic Resonance (1H NMR) spectra) confirmed that Fe3O4 NP surface was carboxylated and capable
Journal of Physics A-mathematical and General, 1993
The authors propose an easy and effective variant of the realization of the dynamical symmetry of... more The authors propose an easy and effective variant of the realization of the dynamical symmetry of hydrogen-like atoms in two-dimensional space, based on the relationship between the Schrodinger equation for the isotropic harmonic oscillator in one-dimensional complex space and the Schrodinger equation for the one-electron atom in two-dimensional space, that permits them to use the operator method to solve the
Concentrations of arsenic and other trace elements in groundwater were examined at three villages... more Concentrations of arsenic and other trace elements in groundwater were examined at three villages (PT, POT and CHL) in the Kandal Province of Cambodia. Concentrations of arsenic in the groundwater ranged from 6.64 (in POT village) to 1543 microg/L (in PT village), with average and median concentrations of 552 and 353 microg/L, respectively. About 86% out of fifteen samples contained arsenic concentrations exceeding the WHO drinking water guidelines of 10 microg/L. Concentrations of arsenic (III) varied from 4 (in POT village) to 1334 microg/L (in PT village), with an average concentration of 470 microg/L. In addition, about 67%, 80% and 86% of the groundwater samples had higher concentrations for, respectively, barium, manganese and lead than the WHO drinking water guidelines. These results reveal that groundwater in Kandal Province is not only considerably contaminated with arsenic but also with barium, manganese and lead. A risk assessment study found that one sample (PT25) had a cumulative arsenic concentration (6758 mg) slightly higher than the threshold level (6750 mg) that could cause internal cancer in smelter workers with chronic exposure to arsenic from groundwater. High cumulative arsenic ingestion poses a health threat to the residents of Kandal Province.
Abstract Volume data sets resulting from, eg, computerized tomography (CT) or magnetic resonance ... more Abstract Volume data sets resulting from, eg, computerized tomography (CT) or magnetic resonance (MR) imaging modal-ities require enormous storage capacity even at moderate resolution levels. Such large files may require compres-sion for processing in CPU memory which, ...
Colloids and Surfaces A-physicochemical and Engineering Aspects, 2011
Magnetic heating effect of Fe3O4 ferrofluids, surface-carboxylated and encapsulated by poly(styre... more Magnetic heating effect of Fe3O4 ferrofluids, surface-carboxylated and encapsulated by poly(styrene-acrylic acid) was studied. Magnetic Fe3O4 NPs were synthesized by coprecipitation method and characterized by X-ray diffraction (XRD), Field Emission Electron Microscope (FESEM) and Vibrating Sample Magnetometer (VSM). Spectroscopic data (Infra red (IR) and Proton Nuclear Magnetic Resonance (1H NMR) spectra) confirmed that Fe3O4 NP surface was carboxylated and capable
Journal of Physics A-mathematical and General, 1993
The authors propose an easy and effective variant of the realization of the dynamical symmetry of... more The authors propose an easy and effective variant of the realization of the dynamical symmetry of hydrogen-like atoms in two-dimensional space, based on the relationship between the Schrodinger equation for the isotropic harmonic oscillator in one-dimensional complex space and the Schrodinger equation for the one-electron atom in two-dimensional space, that permits them to use the operator method to solve the
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