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  • Articles  (52)
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  • Articles  (52)
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  • 11
    Electronic Resource
    Electronic Resource
    Multielement neutron activation analysis of biological materials using chemical group separation and Ge(Li) gamma spectrometry (1985)
    Springer
    Journal of radioanalytical and nuclear chemistry 89 (1985), S. 13-22 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Neutron activation analysis (NAA) for the determination of some trace elements in biological materials is described. The method presented permits the simple and rapid determination of Se, Ag, Au, Sb, Pt (via199Au), Hg, Co, Ni (via58Co), Fe, Zn, Mo, Sn, Cr, Cd, Cu and As after radiochemical separation from Na, K, Cs, Rb and partially Br. For this purpose, postirradiation separation by extraction with mercury or zinc amalgam was used. Separation of gold by extraction with ethyl acetate or by precipitation with dimethylglyoxime was applied for the determination of gold and platinum in biological materials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02070199
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  • 12
    Electronic Resource
    Electronic Resource
    The incorporation of selenium and ytterbium into some organs of mice determined by neutron activation analysis (1985)
    Springer
    Journal of radioanalytical and nuclear chemistry 91 (1985), S. 329-335 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The concentration of Se and Yb in the livers, kidneys, spleens and pancreases of mice were determined after the injection of selenodiglutathione and ytterbium chloride (singly or together) by neutron activation analysis. Both Se and Yb were incorporated into all the investigated organs and subcellular liver fractions. The highest Se level was found in the liver and kidneys and the highest Yb level was found in the pancrease and spleen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02061036
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  • 13
    Electronic Resource
    Electronic Resource
    Digital method of net peak area determination in activation analysis (1989)
    Springer
    Journal of radioanalytical and nuclear chemistry 129 (1989), S. 103-112 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A study of the precision by three methods of gamma-ray photopeak integration has been carried out. COVELL's, “total peak area” method and the proposed method have been considered. The latter was considered to be the most advantageous because of its relatively high precision and simplicity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037573
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  • 14
    Electronic Resource
    Electronic Resource
    Use of INAA to study the interaction between Ag and Se, Zn, Rb, Fe or Co in mice (1989)
    Springer
    Journal of radioanalytical and nuclear chemistry 129 (1989), S. 425-433 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The interaction of inorganic silver (as AgNO3) with SeO2 and Se-compounds was studied. Instrumental neutron activation analysis (INAA) was applied as the analytical method. Organ concentrations of Ag were always significantly higher 72 hours after simultaneous intraperitoneal injections with AgNO3 and Se-compounds. Moreover, simultaneous injections elevated the Se-content in organs examined. We suggest that Se-compounds protect against liver lesions by markedly decreasing the concentration of Ag in this organ 2 hours after simultaneous injections. It was also found that Ag supply affects the contents of Zn, Rb, Fe and Co.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02039839
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  • 15
    Electronic Resource
    Electronic Resource
    Interaction between Se and Cr and distribution of Zn, Rb, Co, and Fe in mice given chromate ions and selenium compounds (1989)
    Springer
    Journal of radioanalytical and nuclear chemistry 134 (1989), S. 383-392 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Male SAS/4 mice injected intraperitoneally with chromate ions and Se-compounds (i.e. selenodiglutathione, selenocystine, selenomethionine and SeO2). The distribution of Se, Cr, Zn, Rb, Co and Fe in liver, kidneys, spleen, heart, lungs, blood, small intestine and eyes has been studied by instrumental neutron activation analysis. Cr was incorporated in all investigated organs and the efficiency of the Cr-accumulation was affected upon the Se-injection. It was found that the mutual and indirect interaction occurs between injected Se-compounds and chromate ions. On the other hand, the interaction of Cr with Zn has been competitive. Injection with chromate ions affects the contents of Rb, Co and Fe in mice organs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02278275
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  • 16
    Electronic Resource
    Electronic Resource
    Interaction between Se and In, and distribution of Zn in mice injected with indium ions and selenium compounds (1991)
    Springer
    Journal of radioanalytical and nuclear chemistry 153 (1991), S. 101-110 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Male Swiss mice were injected intraperitoneally with indium ions and Se-compounds (viz. selenomethionine and SeO2). The distribution of Se, In and Zn in liver and spleen has been studied by instrumental neutron activation analysis. Se and In were incorporated in all investigated organs. The simultaneous injections with In and Se-compounds do not produce observable In−Se correlations effects. On the other hand, it was found that the simultaneous and single In injections increase the Zn-content in liver (24 h after injections), whereas no correlation effects were observed in spleen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02164870
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  • 17
    Electronic Resource
    Electronic Resource
    A digital photopeak integration in activation analysis (1992)
    Springer
    Journal of radioanalytical and nuclear chemistry 158 (1992), S. 139-147 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A study of the precision attainable by two methods of γ-ray photopeak computation has been carried out. The “total peak area” method (TPA) and the proposed new method have been compared. The method offered is digital and simulates repeatedly accumulations of γ-ray spectra. The method described here computes the apparent net peak area without a clear distinction between peak and non-peak related channels. The proposed method is considered to be the most advantageous because of its relatively high precision.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02034780
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  • 18
    Electronic Resource
    Electronic Resource
    Effect of selenium on the Hg, Zn, Fe and Co content of yeast cells (1992)
    Springer
    Journal of radioanalytical and nuclear chemistry 158 (1992), S. 455-462 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The yeast cells, Saccharomyces cerevisiae, were exposed to Hg2+ ions (10−4M) and SeO2 (2·10−4−10−2M) or Se- methionine (2·10−4M). Instrumental neutron activation analysis (INAA) was used to analyze changes in the Hg, Zn, Fe and Co levels in these cells. When the yeast was incubated in a medium containing 10−3M and 10−2M SeO2, the Hg content of the yeast markedly increased. It was also found that the uptake of Se and Hg influenced the levels of Zn, Fe and Co found in the cells. While the presence of Se-methionine (Se-Met), SeO2 or Hg2+ ions caused increases in the intracellular Zn levels, the combined presence of Hg2+ and SeO2 and their assumed interaction, reduced the efficiency of Se for increasing the Zn content of yeast.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02047129
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  • 19
    Electronic Resource
    Electronic Resource
    Use of INAA to study the effect of selenium on uranium accumulation in cells of saccharomyces cerevisiae (1994)
    Springer
    Journal of radioanalytical and nuclear chemistry 177 (1994), S. 393-401 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Differences in the effects of seleno-cystine (CySe)2 and inorganic Se(IV) and Se(VI) compounds on uranium(VI) uptake by yeast cells, Saccharomyces cerevisiae have been studied. The Se, U, Zn and Co levels of the yeast cells were measured by neutron activation analysis. An increase in the concentration of U cells within the first 2 hours of incubation was produced by the presence of SeO2 (2·10−4–5·10−4M) and (CySe)2 (1·10−4M) in the yeast medium. Moreover, the highest SeO2 concentration (5·10−4M) and (CySe)2 more efficiently enhanced the U content of the cells than SeO2 at the low concentration end (2·10−4M). However, the effect of SeO2 and (CySe)2 on U uptake diminishes with incubation time (from 2 to 48 hours). Se(VI) [as (NH4)2SeO4] leads to a marked decrease in the content of uranium in Saccharomyces cerevisiae (an antagonistic interaction). As expected, uranium uptake by the yeast influence the retention of selenium in the cells. Uranium significantly increased the uptake yield of Se by Saccharomyces cerevisiae when the yeast was incubated in the medium containing (CySe)2. Furthermore, during the initial 24 hours of the incubation an increase of the Se content of the cells in the presence of U was observed when Se(VI) was in the culture medium. Selenium and uranium dosages affected the Zn and Co contents of cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02061136
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  • 20
    Electronic Resource
    Electronic Resource
    Use of neutron activation analysis for the determination of cesium in Pd electrodes on Pt and Au matrices (1995)
    Springer
    Journal of radioanalytical and nuclear chemistry 199 (1995), S. 375-383 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A method of neutron activation analysis (NAA) for the determination of Cs inside a thin Pd electrode deposited on a Pt or Au matrix is reported. This simple and rapid method involves a post-irradiation radiochemical separation of Cs from high activities of interfering radionuclides. The separated Cs was determined by high resolution γ-ray spectrometry. The method allows the determination of Cs without a time-consuming cooling period. The radiochemical procedure (RNAA) is found to be relatively highly precise, sensitive, rapid and simple. Pre-irradiative chemical separation of Cs is likely to be reasonable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02162947
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