Results 161 to 170 of about 6,347 (227)

Irradiation of strontium chloride targets at proton energies above 35 MeV to produce PET radioisotope Y-86

Radiochimica Acta, 2011
Abstract Proton irradiation of natural and enriched SrCl2 targets was used to produce PET radioisotope 86Y. The proton energy was degraded from the incident 117.8 MeV to induce the 88Sr(p,3n) reaction. For the irradiation three pellets made of natSrCl2 (6.61 and 74.49 g) and 88SrCl2 (5.02 g) were pressed and individually encapsulated in ...
Dmitri Medvedev, L.F. Mausner, S.C. Srivastava   +2 more
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The optimization of the precision of the strontium/calcium ratio measurement in coral samples by radioisotope induced X-ray fluorescence

Spectrochimica Acta Part B: Atomic Spectroscopy, 1997
Abstract The estimation of sea surface water temperatures from the determination of the [Sr/Ca] atomic ratio in coral skeletons has been shown to be a promising method for investigating climate models. The determination of the Sr/Ca ratio by atomic absorption spectrometry was shown not to be acceptable because of the poor precision (around 3 ...
J. J. LaBrecque, P. A. Rosales
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Competetive transport of cobalt-60, strontium-90, and cesium-137 radioisotopes across polymer inclusion membranes with DNNS

Journal of Membrane Science, 2007
Abstract Plasticized cellulose triacetate membranes with 3,7-dinonyl-naphtalene-1-sulfonic acid (DNNS) containing o -nitrophenyl pentyl ether (ONPPE) as the plasticizer were prepared for competitive transport of Cs-137, Sr-90, and Co-60 isotopes from aqueous solutions at concentration of 1.0 × 10 −7  M each and containing 0.10 M sodium nitrate.
Cezary Kozłowski, W. Walkowiak
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Separation of cobalt-60, strontium-90, and cesium-137 radioisotopes by competitive transport across polymer inclusion membranes with organophosphorous acids

Desalination, 2006
Abstract The removal and separation of Co-60, Sr-90, and Cs-137 radioisotopes from nitrate aqueous solutions were studied by competitive transport across cellulose triacetate plasticized membranes using organophosphorous acids compounds (D2EHPA, Cyanex 272, Cyanex 301 and Cyanex 302). Competitive transport of trace radionuclides ions from 0.10 M NaNO
Cezary Kozłowski, Jolanta Kozłowska, Witalis Pellowski, W. Walkowiak   +3 more
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Local structure of strontium adsorbed on 2:1 clay minerals and its comparison with cesium by XAFS in terms of migration of their radioisotopes in the environment

Journal of Radioanalytical and Nuclear Chemistry, 2018
This study aimed to reveal local structures of strontium (Sr) and cesium (Cs) adsorbed on clay minerals (vermiculite and montmorillonite), which suggests stabilities of the adsorbed species of 90Sr and 137Cs in the environment. Adsorption experiments to determine solid-water distribution, XRD for interlayer distances of the clay minerals, and EXAFS for
A. Yamaguchi, Masato Tanaka, Yuich Kurihara, Yoshio Takahashi   +3 more
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An Overview of Fukushima-Derived Strontium Radioisotopes

, 2022
Ismail M.M. Rahman, Hikaru Sawai, Md. Ferdous Alam, Zinnat A. Begum   +3 more
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Determination of strontium radioisotopes in routine and emergency samples

Applied Radiation and Isotopes, 2022
We present the radioanalytical strategies used for the determination of strontium radioisotopes in routine and emergency samples. While in routine monitoring, the main goal is to achieve limits of detection as low as possible. In emergency, priority is given to the rapid procurement of data about a contamination.
J A, Corcho-Alvarado, R, Gosteli, S, Röllin, H, Sahli, M, Stauffer, M, Burger   +5 more
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Strontium-calcium metabolism in man and animals as studied by radioisotope methods

The International Journal of Applied Radiation and Isotopes, 1957
C. L. Comar, R. H. Wasserman
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The uptake of radioisotopes onto clays and other natural materials [PDF]

Journal of Radioanalytical and Nuclear Chemistry, 1999
Montmorillonite and illite clays were examined for their ability to take up cesium and strontium radioisotopes from solution. Uptakes onto near homoionic Na, Ca, Mg and Sr clays were assessed by distribution coefficients measured at different Na, Cs, Mg, Ca and Sr solution concentrations.
J. K. K. Chow, I. M. Umar, A. Dyer
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Systemic administration of new therapeutic radioisotopes, including phosphorus, strontium, samarium, and rhenium

Current Opinion in Oncology, 1994
New advances in systemic radionuclide therapy have increased the number of treatment options available for patients with painful osseous metastases. This form of therapy has three major appeals: 1) it addresses all sites of involvement; 2) selective absorption into bone limits irradiation of normal tissues; and 3) as a result, toxicity may be reduced ...
Lawrence P. Davis, Edgar Ben-Josef, Arthur T. Porter   +2 more
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