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  • Aktivierungsanalyse, Neutronen  (1)
  • Lymph nodes  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 221 (1981), S. 361-370 
    ISSN: 1432-0878
    Keywords: Lymphocyte migration ; Spleen ; Lymph nodes ; Pig
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Porcine peripheral blood lymphocytes were labelled with tritiated uridine in vitro and transfused into normal young pigs. Serial biopsies were taken from the spleen and mesenteric lymph nodes, and the localization of labelled lymphocytes determined on autoradiographs. Four to five hours after cell infusion samples of Peyer's patches, tonsils and small intestine were taken and the labelled lymphocytes classified by their localization in different organ compartments. In spleens most labelled cells were found in the red pulp and about 30 % in the marginal zone. Within 4 to 5 h there was a constant increase in labelled lymphocytes in the compartments of the white pulp with more cells localized in the periarteriolar lymphatic sheath than in the corona. In lymph nodes about two thirds of all labelled cells were seen in the wall of high endothelial venules 15 min after cell infusion. Labelled cells then decreased in the vessel wall, but, at the same time, increased in the neighbourhood of these vessels and other parts of the paracortex. After 5 h about 10 % of labelled lymphocytes had already migrated into the corona. In tonsils and Peyer's patches a comparable distribution of labelled cells was found in the organ compartments. The kinetics and the route of migration in the spleen and lymph nodes are therefore comparable to data for other species, despite the peculiar structure of pig lymph nodes and the paucity of lymphocytes in efferent lymphatics in pigs.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 267 (1973), S. 270-273 
    ISSN: 1618-2650
    Keywords: Best. von Antimon, Arsen, Cadmium, Kupfer, Quecksilber, Zink in Wasser ; Aktivierungsanalyse, Neutronen ; Spurenanalyse
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Als Ziel der vorliegenden Untersuchung war festzustellen, ob die Neutronen-Aktivierungs-analyse als Methode für eine routinemäßige Überwachung von Trinkwasserproben geeignet ist. Untersucht wurden Wasserproben von Wasserwerken des Gebietes Südbaden auf den Gehalt der Elemente As, Cd, Cu, Hg, Sb und Zn. Die Wasserproben wurden vor der Bestrahlung gefriergetrocknet. Mit Ausnahme des Cu, bei dem das die Messung störende Na durch einfache chemische Trennung entfernt wurde, konnten die Proben direkt nach der Bestrahlung gemessen werden. Die erhaltenen Ergebnisse werden mit den Richtlinien der WHO verglichen. In 2 Fällen wurden diese Konzentrationen erheblich überschritten. Eine Aufstellung der aufgetretenen Kosten wird vorgenommen.
    Notes: Abstract The aim of the presented paper is to determine the capability of neutron activation analysis as a routine control of drinking water. Water samples of waterworks in an area of Southern Germany have been analysed in respect to the content of As, Cd, Cu, Hg, Sb und Zn. The samples were freeze-dried before irradition. The disturbing Na-24 content has been removed by ion-exchange in the case of Cu, while the other elements have been measured directly. The results are compared with the tentative limits for drinking water suggested by the WHO. The corresponding element concentrations exceeded in two cases significantly these limits. The cost of water analysis by neutron activation is calculated.
    Type of Medium: Electronic Resource
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