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  • Electronic Resource  (4)
  • 1975-1979  (1)
  • 1960-1964  (3)
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  • Electronic Resource  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 40 (1961), S. 119-125 
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Zusammenfassung 1. Zum Nachweis von biologischen radioprotektiven Substanzen wurde eine mikrobiologische Screening-Methode ausgearbeitet. 2. Bei diesen Untersuchungen wurden Escherichia coli 0 111 und Streptomyces bikiniensis als Testorganismen verwendet. 3. Die Empfindlichkeit des Tests wurde mit Dosen von 1, 10, 100 μg der bekannten Radioprotektoren kontrolliert. 4. Unter den in äquimolaren Dosen verglichenen Protektoren erwiesen sich die SH-Stoffe an beiden Mikroorganismen am wirksamsten. 5. Unter 40 unbekannten Streptomyces-Fermentsäften fanden wir zwei wirksame.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 85 (1976), S. 117-124 
    ISSN: 1432-1335
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Der Einbau von radioaktiv markiertem Methylcholanthren wurde autoradiographisch (Licht-und Elektronenmikroskopie) und mit der Liquid-Szintillationsmethode untersucht. Nach 24 stündiger Behandlung mit einer Methylcholanthren-Konzentration von 0,01–2,5 μg/ml stehen die Zahlen der markierten Zellen und auch die Silberkornzellen in Korrelation mit der Behandlungszeit und mit den angewandten Dosen. Nach Behandlung mit 2,5 μg/ml Methylcholanthren sind alle Zellen markiert, bei 0,01 und 0,1 μg/ml nur 2 bzw. 10% der Zellpopulation. Diese Ergebnisse weisen darauf hin, daß der Markierungsindex früher 100% erreicht als das bei der Durchschnittszahl der Silberkörner zu erwarten ist. Die elektronenmikroskopische Autoradiographie zeigt eine ziemlich gleichmäßige Verteilung der Silberkörner und keine bevorzugte Bindungsstelle des Methylcholanthrens. Durch biochemische Analysen wird gezeigt, daß 1 Std und 24 Std nach Beginn der Behandlung 59 bzw. 44% der Radioaktivität an die Makromoleküle gebunden ist.
    Notes: Summary The incorporation of radioactive labelled Methylcholanthrene into CBA/T6T6 mouse embryonic fibroblast cultures was studied by using light and electronmicroscopic autoradiographic and also liquid scintillation counting techniques. During 24 hrs treatment time at the applied Methylcholanthrene concentrations (0.01–2.5 μg/ml) the proportion of cells labelled with 3H-Methylcholanthrene and the number of grains above the cells showed a relationship with the duration of treatment and also with the doses. Up to 24 hrs all cells were labelled after treatment with 2.5 μg/ml whereas at 0.01 and at 0.1 μg/ml concentrations Methylcholanthrene could have been detected only 2 and 10% of the cell population resp. The presented results suggested that labelling index reached saturation level earlier than the average number of grains. Electronmicroscopic autoradiography revealed a rather even distribution of grains and there were no signs for preferential binding site of Methylcholanthrene. Biochemical separation showed that 59 and 44% of the radioactivity was bound to macromolecules at 1 and 24 hrs after commencing treatment resp.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 44 (1962), S. 228-232 
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. The radioprotective activity of several hundreds of fermentation liquids have been examined by methods described in our previous reports. 2. Out of the tested fermentation liquids, good protective ability was rendered—mainly after acid hydrolysis—by the fermentation liquid of Penicillium notatum strain which is applied also in industry. 3. The agent, when it was produced, proved to be d-Penicillamine. 4. The radioprotective activity of d-Penicillamine as well as its ability to reduce the toxicity of nitrogen mustard have been compared with the effect of other wellknown radioprotectors, on an equimolar basis. 5. It was found that its protective ability for E. coli B against both X-ray and nitrogen mustard is about the same degree as that of cysteine. 6. From the results, theoretical and practical conclusions have been drawn.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 49 (1962), S. 236-236 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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