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  • 1
    Digitale Medien
    Digitale Medien
    Alkaline Phosphatase and Tumour Inhibition (1948)
    [s.l.] : Nature Publishing Group
    Nature 162 (1948), S. 338-339 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] IN the course of bioassays of extracts of normal male urine1,2 for tumour-inhibiting properties, we have investigated their effect on alkaline phosphatase present in certain tumours by Gomori's histological technique. Similar examinations were carried out using other ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/162338b0
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Analytical applications of neutron depth profiling (1987)
    Springer
    Journal of radioanalytical and nuclear chemistry 112 (1987), S. 33-46 
    Details
    ISSN: 1588-2780
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Energietechnik
    Notizen: Abstract Using a low-energy neutron beam as an isotopic probe, neutron depth profiling (NDP) provides quantitative depth profiles in nearly all solid matrix materials. Several of the light elements, such as He, Li, B, and N can be nondestructively analyzed by NDP. The information obtained using NDP is difficult if not impossible to determine by non-nuclear techniques. As a result, NDP is used collaboratively with techniques such as SIMS, RBS, FTIR, PGAA, and AES. Profiles measured by NDP are given for semiconductor and optical processing materials, and light weight alloys. Improvements in the technique are discussed with emphasis on the use of intense cold neutron beams.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02037274
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  • 3
    Digitale Medien
    Digitale Medien
    Direct measurement ofk o for monitor neutron activation analysis (1994)
    Springer
    Journal of radioanalytical and nuclear chemistry 179 (1994), S. 105-112 
    Details
    ISSN: 1588-2780
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Energietechnik
    Notizen: Abstract This paper introduces the thermal column or the cold neutron guide beam of the 20 MW NBSR at the National Institute of Standards and Technology as a directk o measurement facility. Measurement ofk o at this facility not only produces accurate values, but avoids the additional correction factors needed in other measurement methods. Thek o of Sb, Ag and Cr with respect to Sc as monitor have been measured and their values are comparable to values based on tabulated nuclear constants and to those measured by other researchers.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02037930
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Precise determination of aluminum by instrumental neutron activation (1987)
    Springer
    Journal of radioanalytical and nuclear chemistry 113 (1987), S. 35-42 
    Details
    ISSN: 1588-2780
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Energietechnik
    Notizen: Abstract Because of the short half life of Al-28, the determination of aluminum by neutron activation is subject to many inaccuracies: variation of irradiation conditions between sample and standard, uncertainties in timing, and the effects of high and varying count rate, in addition to other sources of error that must be controlled even in work with long-lived nuclides. These errors can all be made smaller than the fundamental limit set by counting statistics, even when that limit is below 0.5 percent. The transfer function from the observed number of net counts to the counting rate at the end of irradiation is modeled as a product of three processes: radioactive decay and extending and nonextending dead time. The procedure has been applied to the analysis of NBS SRM 1633a Fly Ash. The mean concentration measured was 14.085% Al, with a standard deviation of the mean 0.023% Al for four determinations. The final results showed no significant imprecision beyond counting statistics. The accuracy of the method is shown by the analysis of high-purity single-crystal sapphire.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02036046
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