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  • 1990-1994
  • 1970-1974  (3)
  • 1970  (3)
Material
Years
  • 1990-1994
  • 1970-1974  (3)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 74 (1970), S. 457-466 
    ISSN: 1432-1335
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Vier verschiedene hepatotrop wirkende Carcinogene (4-Dimethyl-amino-azobenzol, Dimethylnitrosamin, Diäthylnitrosamin, Nitrosomorpholin) wurden an 96 Ratten des Stammes BR 46 oral über 580 Tage in solchen Tagesdosen verabreicht, die bei alleiniger Gabe nur einer Substanz “unterschwellig” sind, also innerhalb der Lebenserwartung nicht zu Leberkrebs führen. Nach einer mittleren Induktionszeit von 700±110 Tagen beobachteten wir bei 34% der Ratten maligne und bei 9% benigne Lebertumoren. In der Kontrollgruppe entstand bei keinem einzigen Tier eine Lebergeschwulst. Damit ist die Addition und Summationsfähigkeit der carcinogenen Einzeleffekte auch dann nachweisbar wenn minimale Dosen chemisch verschiedener Carcinogene mit gleicher Organotropie gegeben werden.
    Notes: Summary 96 rats of the strain BR 46 were given orally for 580 days at the same time four different liver carcinogens (4-dimethyl-amino-azobenzene, dimethylnitrosamine, diethylnitrosamine, nitrosomorpholine) in such daily dosages which are “subtreshold” if only one of these carcinogens was given alone and produced no liver cancer during the normal life time of the animals. After a medium induction time of 700±110 days we observed in 34% of the rats malignant and in 9% benign liver tumors. In the controls no liver tumors were found. By this, the addition and ability of summation of carcinogenic single effects is also then demonstrable if minimum dosages of chemically different carcinogens with the same organotropic action are applied.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 74 (1970), S. 112-113 
    ISSN: 1432-1335
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Orally and subcutaneously administered dibutylnitrosamine caused tracheal papillomata, lung tumors, some papillomata of the forestomach and the urinary bladder in Syrian hamsters, while Chinese hamsters showed numerous papillomata of the forestomach and slight changes of the bladder epithelium.
    Notes: Zusammenfassung 13–30 Wochen nach oraler bzw. subcutaner Verabreichung von Dibutylnitrosamin entstanden bei syrischen Hamstern Trachealpapillome, Lungentumoren und einige Papillome des Vormagens und der Harnblase, während sich bei chinesischen Hamstern außer vergleichbaren Blasenepithelveränderungen in einem hohen Prozentsatz Vormagenpapillome entwickelten.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 74 (1970), S. 110-111 
    ISSN: 1432-1335
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 40 männliche Ratten des Sprague-Dawley-Stammes erhielten Butyläthyl-nitrosamin in einer Dosis von 50 mg/kg/Woche über 20 Wochen rectal appliziert. Neben toxischen Leberschäden entstanden bei 8 Tieren maligne und bei 7 benigne Lebertumoren. 9 Ratten zeigten Papillome bzw. Hyperkeratosen der Speiseröhre.
    Notes: Summary Butyl-ethyl-nitrosamine was given by rectal application in 40 male rats of the Sprague-Dawley-strain. The single dose was 50 mg/kg/week and we injected this dose over 20 weeks. Beside toxic liver injuries there arose in 8 animals malignant and in 7 benigne liver tumors. 9 rats showed papillomas and hyperkeratoses of the oesophagus.
    Type of Medium: Electronic Resource
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