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Development of resin-bead isotope-dilution mass spectrometric techniques for Tc-99 analysis

Description: An isotope dilution mass spectrometric method was developed for the analysis of Tc-99 after isolating it onto anion exchange resin beads. A single resin bead containing Tc-99 and Tc-97 spike is loaded onto a rhenium V-shaped filament for thermal emission mass spectrometry. The application of this technique requires the use of a mass spectrometer of high abundance sensitivity and pulse counting capability for the necessary ion detection sensitivity. This paper discusses the development of the te… more
Date: January 1, 1979
Creator: Walker, R.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Molecular mechanisms of the epithelial transport of toxic metal ions, particularly mercury, cadmium, lead, arsenic, zinc, and copper. Progress report, January 1, 1979-December 31, 1979. [3-week-old cockerels]

Description: The purpose of the present studies was to elucidate the mechanism of lead transport, and especially the particular similarities or dissimilarities between lead and calcium in this process. The absorption of these metals was determined in 3-week old White Leghorn cockerels, raised on a commercial diet or on a specified diet, using in vivo ligated loop procedure. The dose administered into the loop contained 0.5 ..mu..Ci /sup 203/Pb (and/or 0.1 ..mu..Ci /sup 47/Ca), and 0.01 mM lead acetate (and/… more
Date: January 1, 1979
Creator: Wasserman, R H
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Molecular mechanisms of the epithelial transport of toxic metal ions, particularly mercury, cadmium, lead, arsenic, zinc, and copper. Progress report, January 1, 1979-December 31, 1979. [Ca; Pb; cockerels]

Description: The mechanism of lead transport is presented, and especially the particular similarities or dissimilarities between lead and calcium in this process. The absorption of these metals was determined cockerels, raised on a commercial diet or on a specified diet, using in vivo ligated loop procedure. The dose administered into the loop contained 0.5 ..mu..Ci /sup 203/Pb (and/or 0.1 ..mu..Ci /sup 47/Ca), and 0.01 mM lead acetate (and/or mM CaCl/sub 2/) in 0.5 ml 0.15 M NaCl,pH 6.5. It was shown that … more
Date: January 1, 1979
Creator: Wasserman, R H
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Long-term leach rates of glasses containing actual waste

Description: Leach rates of borosilicate glasses that contained actual Savannah River Plant waste were measured. Leaching was done by water and by buffer solutions of pH 4, 7, and 9. Leach rates were then determined from the amount of /sup 137/Cs, /sup 90/Sr, and Pu released into the leach solutions. The cumulative fractions leached were fit to a mathematical model that included leaching by diffusion and glass dissolution.
Date: January 1, 1979
Creator: Wiley, J. R. & LeRoy, J. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Discrepancy between differential and integral results for the /sup 63/Cu(n,. cap alpha. )/sup 60/Co cross sections. [Threshold to 10 MeV]

Description: The threshold-reaction /sup 63/Cu(n,..cap alpha..)/sup 60/Co is of special importance in reactor dosimetry for long-term fast-flux integration. The inconsistency in the available differential and integral data base has limited the applicability of that reaction as a reliable monitor. The availability of results from a recent measurement of the excitation function for the reaction /sup 63/Cu(n,..cap alpha..) at ANL prompted a further investigation of this problem. The implications of the new dat… more
Date: January 1, 1979
Creator: Winkler, G.; Smith, D. L. & Meadows, J. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Organic radiopharmaceuticals: recent advances

Description: Organic radiopharmaceuticals are considered in light of accelerator and nuclide production requirements, special problems relating to the carrier-free state, including terminology, of the special technology required to prepare and manipulate these compounds and new trends in compound design and synthesis. The emphasis is on medical cyclotrons and the positron-emitting radionuclides, carbon-11, nitrogen-13, oxygen-15, and fluorine-18. New routes to synthetic precursors and organic compounds of h… more
Date: January 1, 1979
Creator: Wolf, A. P. & Fowler, J. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Efficient microscale preparation of tin-117m-tin tetrachloride-a pivotal intermediate for the synthesis of tin-117m-labeled radiopharmaceuticals

Description: A microscale technique has been developed for the preparation of /sup 117m/SnCl/sub 4/. The radiolabeled tin tetrachloride is an important intermediate for the synthesis of /sup 117m/Sn-labeled organic radiopharmaceuticals. The flow-through system involves high temperature chlorination of metallic /sup 117m/Sn with subsequent cryogenic collection of the /sup 117m/SnCl/sub 4/ in a special reaction vessel. This vessel can then be used for the conversion of the tin tetrachloride to various useful … more
Date: January 1, 1979
Creator: Woo, David V.; Knapp, Furn F., Jr.; Butler, Thomas A. & Callahan, Alvin P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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