Results 151 to 160 of about 801,196 (212)
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, 2020
Modern technological routes of decontamination of polluted environments are expected to outperform traditional strategies. Such routes have been perceived as more efficient and/or less expensive, and, most of all, as environmentally friendly.
H. M. Saleh +5 more
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Modern technological routes of decontamination of polluted environments are expected to outperform traditional strategies. Such routes have been perceived as more efficient and/or less expensive, and, most of all, as environmentally friendly.
H. M. Saleh +5 more
semanticscholar +1 more source
Nuclear alignment in isotopes of cobalt
Physica, 1952Synopsis A significant anisotropy of γ radiation from aligned Co 60 nuclei has been detected. From the variation of the anisotropy with temperature a value for the magnetic moment can be determined: this is 3.5 ± 0.5 nuclear magnetons and is consistent with the Schmidt limit of 3.8 based on nuclear shell model assignments. Similar investigation of Co
M.A. Grace, H. Halban
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Isotope effect and self-diffusion in face-centred cubic cobalt
Physica Status Solidi (a), 1979Self-diffusion in cobalt is investigated from 896 to 1745 K by means of the standard radio-tracer method using lathe sectioning in the paramagnetic and sputter sectioning in the ferromagnetic region. The diffusion coefficients vary between about 10−17 cm2 s−1 and 10−9 cm2 s−1; their temperature dependence can be described by DT = 0.55 exp (−2.99 eV/kT)
W. Bussmann +4 more
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Determination of Small Amounts of Cobalt Using Isotope-Dilution with Cobalt-60
Analytical Chemistry, 1961Trace amounts of cobalt are determined in vitamin B/sub 12/ and biological materials by an isotope-dilution technique combined with a spectrophotometric method. Interference due to copper is overcome by reduction with metallic iron. The procedure employs Co/sup 60/ as the tracer. (auth)
J. T. Byrne, G. A. Rost
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LEAD ISOTOPE RATIOS FROM THE COBALT–NORANDA AREA, CANADA
Canadian Journal of Earth Sciences, 1965Lead isotope ratios indicate that very old galenas in Archean volcanics and sediments in the vicinity of Timmins, Ontario; Noranda and Val d'Or, Quebec, have had additions of younger lead of the type found near Cobalt, Ontario. The mixture of leads of two distinct ages has produced isotopic ratios which are linearly related.
E. R. Kanasewich, R. M. Farquhar
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A Novel Technique to Determine Cobalt Exchangeability in Soils Using Isotope Dilution
Environmental Science & Technology, 2007The environmental risk posed by Co contamination is largely a function of its oxidation state. Our objective was to assess the potential biological availability of Co and the reactions and fate of soluble Co(II) after addition to soils with varying physical and chemical characteristics.
Wendling, Laura A. +2 more
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Radiochemical separation of cobalt by isotopic exchange
Talanta, 1964Abstract The radiochemical separation of cobalt by an isotopic exchange technique has been evaluated for an aqueous 0.5 M oxalic acid system. The optimised procedure requires 6 min for the entire separation and gives cobalt yields of more than 83%.
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Sulphur-isotope geochemistry of silver–selpnarsenide vein mineralization, Cobalt, Ontario
Canadian Journal of Earth Sciences, 1986The silver–sulpharsenide vein deposits of Cobalt, Ontario, crosscut basement Archean metavolcanic rocks, Proterozoic strata, and younger Proterozoic diabase sills. A petrographic and sulphur-isotope study of the metallic minerals was initiated to assess possible genetic models of vein formation.
M. D. Goodz +3 more
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Lead-isotope study of mineralization in the Cobalt district, Ontario
Canadian Journal of Earth Sciences, 1986Twenty-seven lead-isotope analyses for galena specimens from 14 localities in the Cobalt district represent sulphide-rich interflow sedimentary units in the Archean volcanic sequence, mineralized zones, fracture fillings, and local sulphide concentrations in the Cobalt Group (Proterozoic) sedimentary rocks, and vein-filling and breccia-cementing ...
R. I. Thorpe +3 more
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Determination of Small Amounts of Cobalt by Isotope Dilution Analysis
Analytical Chemistry, 1962Isotope dilution analysis is combined with solvent extraction and spectrophotometry to produce an effective general method for the determination of constituents that are not extracted quantitatively. Combining isotope dilution with extraction of the cobalt-- 2-nitroso-1-naphthol complex into chloroform results in an accurate and reliable method for the
W. D. Ralph, T. R. Sweet, Inara Mencis
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