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  • 1
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: In the photon energy range from 40 to 1000 eV, we have measured reflectances and transmittances of polyimide foils as well as reflectances and total photoelectron yields of Cu and Pt films. We compare sets of optical constants derived by the different methods applied to the same sample. The degree of agreement gives an indication of the present status of determining optical properties in the XUV. This is relevant for the planning of advanced instrumentation.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract From XPS core level spectroscopy the average copper charge on the Cu sites in the high temperature superconductor Y1Ba2Cu3O7−x is determined as function of the oxygen vacancy concentrationx. Analysis of these data leads to the suggestion that there are holes on the oxygen sites in the basal plane of the crystal structure. The probability for holes on these oxygen ions is rather constant for 0≦x≦0.3 with a value of 0.64 and decreases to zero forx=0.5. The dependence of the superconducting transition temperature on the hole concentration is discussed. An energy level diagram for Cu2+ and Cu3+ in YBa2Cu3O7−x is constructed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European journal of nutrition 24 (1985), S. 44-53 
    ISSN: 1436-6215
    Keywords: Vitamin D ; Vitamin-D-Metaboliten ; Frauenmilch ; Kuhmilch ; Säuglingsnahrung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Summary A review is given of the results of vitamin D determinations in human and cow's milk using physico-chemical methods. Thereby only parent vitamin D is determined. Further, the results obtained with protein-binding assays are discussed in detail. With the aid of these newer methods the concentrations of hydroxylated vitamin D derivatives can also be measured. A comparison of the concentration of these vitamin D metabolites in human milk and infant formulas based upon cow's milk suggests that the higher anti-rachitic activity of human milk is connected with its higher concentration of 25-hydroxy-vitamin D.
    Notes: Zusammenfassung Nach einer übersicht der Untersuchungen von Frauenmilch und Kuhmilch, die mit biologischen und physikalisch-chemischen Methoden durchgeführt worden sind und die nur das native Vitamin D erfassen, werden die Ergebnisse, die mit neueren Nachweisverfahren gewonnen wurden, ausführlich diskutiert. Die Anwendung von Proteinbindungsassays ermöglicht auch eine Bestimmung von hydroxylierten Vitamin-D-Metaboliten. Ein Vergleich der Konzentrationen von Frauenmilch und Säuglingsformulae auf Kuhmilchbasis deutet darauf hin, daß die günstigere antirachitische Aktivität von Frauenmilch vor allem auf den höheren Gehalt an 25-Hydroxy-Vitamin D zurückzuführen ist.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Infection 16 (1988), S. 171-174 
    ISSN: 1439-0973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Vor der geplanten Hepatitis-B-Impfung wurden 36 000 Angehörige von medizinischen Berufen auf HBs-Antigen, HBc-Antikörper und HBs-Antikörper getestet. Dabei wurde in 210 Sera HBs-Antigen und HBc-Antikörper nachgewiesen. 171 dieser Sera konnten auch mittels Hybridisierungstechnik auf virale Hepatitis B-DNS als Marker der Infektiosität untersucht werden. Nur bei 15 war virale Nukleinsäure nachweisbar. Bei 139 fanden sich HBe-Antikörper, von denen aber nur zwei HBV-DNS-positiv waren. Zwölf Personen, die alle HBV-DNS-negativ waren, hatten weder HBe-Antigen noch HBe-Antikörper. Hingegen wurde virale Nukleinsäure bei 13 von 20 Sera gefunden, die HBe-Antigen, aber keine HBe-Antikörper enthielten. Unsere Untersuchung bestätigt die epidemiologische Beobachtung, daß dem medizinischen Personal kaum eine Rolle als Infektionsquelle für die Patienten zukommt.
    Notes: Summary Prior to hepatitis B vaccination, 36,000 persons of the medical staff were tested for HBs antigen, HBc antibodies, and HBs antibodies. 210 sera were found positive for HBs antigen and HBc antibodies. Of these sera, 171 were available for testing for hepatitis B virus DNA as a marker of infectivity by spot hybridization. DNA was detected in only 15. One hundred and thirty-nine had HBe antibodies but no detectable HBe antigen, and only two of these were hepatitis B virus DNA positive. 12 had neither HBe antigen nor HBe antibodies and none had hepatitis B virus DNA. Hepatitis B virus DNA was, however, detected in 13 of 20 HBe antigen-positive but HBe antibody-negative sera. Our study confirms epidemiological observations that medical staff hardly plays any role as a source of HBV infection for patients.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Type of Medium: Electronic Resource
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