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  • 1
    Electronic Resource
    Electronic Resource
    Coenzyme-substrate adducts as inhibitors of mouse liver 3,4-dihydroxyphenylalanine decarboxylase (1979)
    s.l. : American Chemical Society
    Journal of medicinal chemistry 22 (1979), S. 233-237 
    Details
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jm00189a003
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis of 5′-deoxypyridoxal derivatives (1979)
    Springer
    Cellular and molecular life sciences 35 (1979), S. 451-452 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A convenient synthesis of 5′-deoxypyridoxal derivatives is described. The method involves catalytic hydrogenolysis of the corresponding 5′-phosphorylated derivatives; products are obtained in high yields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01922699
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Multielement analysis of foods by neutron capture prompt γ-ray activation analysis (1993)
    Springer
    Journal of radioanalytical and nuclear chemistry 167 (1993), S. 139-144 
    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 is described for the determination of H, B, Cl, K, Na, S, Ca, and Cd in foods using in-beam neutron capture prompt γ-ray activation analysis. Special calibration procedures were necessary because of matrix-related thermal neutron scattering-induced sensitivity and background enhancements. Detection limits and sensitivities are presented for best-case and worst-case irradiation conditions. The method was applied to multielement analysis of 41 foods and to B, Cl, and K analysis of 13 orange juice produts in conjunction with analysis by inductively coupled plasma atomic emission spectrometry. The purpose of the latter application was to study B losses during acid digestion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02035473
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Maple syrup analysis for137Cs, K, and B, using a low-background counting system and PGAA (1995)
    Springer
    Journal of radioanalytical and nuclear chemistry 194 (1995), S. 351-357 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Fifteen maple syrups were analyzed for137Cs and K (via40K) by using a low-background γ-ray counting system, and for B and K by using neutron capture prompt γ-ray activation analysis (PGAA). For low-background γ-ray counting, 3σ limits of detection (24-hour counts) were 0.03 Bq137Cs/kg and 10 mg K/kg for 3.5-L portions and 0.08 Bq137Cs/kg and 20 mg K/kg for 1.0-L portions. K concentrations determined by the two methods (using 2-g portions for PGAA) were in excellent agreement. The products were obtained in 1991, with one produced in Maryland, three in New York, four in Pennsylvania, two in New Hampshire, and five in Canada. The average activity concentration for Canadian syrups (2.8 Bq137Cs/kg) was nearly a factor of 20 greater than the average (0.15 Bq137Cs/kg) for the other syrups, but all137Cs activity concentrations were at least 100 times lower than those for which controls would be recommended according to Federal Radiation Council guidance. The data exhibited distinct groupings related to the sources of the products when the ratios of137Cs activity to K content (BqCs/mgK) were plotted vs. B concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02038434
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  • 5
    Electronic Resource
    Electronic Resource
    Analysis of foods for iodine by epithermal neutron activation analysis (1987)
    Springer
    Journal of radioanalytical and nuclear chemistry 112 (1987), S. 341-346 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Epithermal-neutron activation analysis (ENAA) was applied to the analysis of foods for iodine. The procedure involves irradiation of wet foods in a boron nitride, vessel, followed by direct counting of the 442.9 keV gamma ray of128I without any processing of the sample. Three research reactors were evaluated for use in determining iodine by ENAA. The University of Virginia reactor at Charlottesville was chosen for this study because the reactor facilities minimized thermal heating of the boron nitride vessel, enabling irradiation of larger, more representative analytical portions. Iodine concentrations ranging from 〈0.003 to 0.74 μg/g are reported for 17 different food matrices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02132366
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  • 6
    Electronic Resource
    Electronic Resource
    Radiochemical determination of As, Cr, Mo, Sb and Se in foods (1987)
    Springer
    Journal of radioanalytical and nuclear chemistry 113 (1987), S. 423-430 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A radiochemical neutron activation analysis procedure was applied to the analysis of foods for As, Cr, Mo, Sb and Se. The elements are retained on an inorganic chromatographic resin of hydrated managanese dioxide while interfering elements are removed. Activities from Br, K, Na and P interferences are reduced by up to six orders of magnitude, and detection limits for food analysis are reduced by factors of 100–2000, compared with those normally found for instrumental neutron activation analysis. Detection limits for the foods analyzed are 0.1–0.3 ng/g for As and Sb and 1–10 ng/g for Cr, Mo and Se. Results are presented for various foods and several National Bureau of Standards Standard Reference Materials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02050516
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  • 7
    Electronic Resource
    Electronic Resource
    Determination of boron in food and biological reference materials by neutron capture prompt-γ activation (1990)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 338 (1990), S. 554-558 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Boron concentrations were determined by in-beam neutron capture prompt-γ activation analysis for 31 food and biological reference materials prepared by the National Institute of Standards and Technology, Agriculture Canada, the National Institute for Environmental Studies of Japan, and the International Atomic Energy Agency. Sensitivity and background enhancements that are consequences of neutron scattering in hydrogenous matrices such as biological reference materials are discussed, as are correction methods for nuclide interferences, with emphasis on sodium. The limit of quantitation for these materials is 1.0–2.5 μg/g and the limit of detection is 0.3–0.8 μg/g, depending on the irradiation time. For materials with boron levels ≥30 μg/g (e.g., most botanicals), the total analytical uncertainty is ≤2%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00322537
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    Paper (German National Licenses)
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