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  • 1985-1989
  • 1975-1979  (2)
  • 1935-1939
  • Acetylenic compounds  (1)
  • DNA levels  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 263 (1978), S. 75-81 
    ISSN: 1432-069X
    Keywords: Keratinocyte cell culture ; Retinoic acid ; Thymidine incorporation ; DNA levels ; Keratinocytenkultur ; Vitamin A-Säure ; Thymidin-Einbau ; DNS-Konzentrationen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Der Einfluß von Vitamin A-Säure auf Gewebekulturen von Keratinocyten gewonnen von Meerschweinchen-Ohren wurde untersucht. Vitamin A-Säure sowie die Vorbehandlung der Plastik-Petri-Schalen mit einer Kollagen-Suspension erleichterte die Zelladhäsion und das Wachstum. Vitamin A-Säure versursachte eine DNS-Synthese-Welle, die durch den Einbau von 3H-Thymidin und die Bestimmung der cellulären DNS nachgewiesen werden konnte. Diese DNS-Synthese erfolgte 24–45 h nachdem die Keratinocyten angesetzt wurden. Während dieser Zeitspanne resultierte die Vorbehandlung mit Vitamin A-Säure in einer zehnfachen Erhöhung des Einbaus von 3H-Thymidin und zeigte ein komplexes Muster von Gipfeln und Schultern, welche die synchrone S-Phase der Keratinocyten darstellen könnte.
    Notes: Summary The effect of vitamin A acid on the culture of guinea pig ear keratinocytes was investigated. Use of this agent and treatment of the plastic dishes with collagen solution facilitated attachment and growth. Vitamin A acid elicited a wave of DNA synthesis which was studied by incoporation of tritiated thymidine and quantitation of cellular DNA, particularly during the period 24–45 h after plating. During this period, thymidine incorporation into DNA was increased ten-fold by vitamin A acid and showed a complex pattern of peaks and shoulders which may represent the S phase of synchronous keratinocytes.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 114 (1977), S. 71-76 
    ISSN: 1432-072X
    Keywords: Methylococcus capsulatus ; Methane oxidation ; Methanol oxidation ; Metal binding compounds ; Acetylenic compounds ; Specific inhibitors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Inhibition studies of methane mono-oxygenase activity in whole cell suspensions of Methylococcus capsulatus (Texas) and M. capsulatus (Bath) were performed and the results compared. The inhibition pattern for M. capsulatus (Bath) was not only substantially different from the pattern obtained with M. capsulatus (Texas) but also very limited in the number of potent inhibitors specific for methane oxidation. To confirm the whole cell results of M. capsulatus (Bath) similar experiments were done using cell-free extracts. It was found that only acetylene (100% inhibition) and 8-hydroxyquinoline (71%) significantly inhibited methane oxidation, verifying the restricted inhibition pattern found with the whole cell suspensions. Eight acetylenic compounds were tested for specific inhibition of methane oxidation by whole cells and cell-free extracts of M. capsulatus (Bath). Only two compounds (acetylene and propyne) gave 100% inhibition in both cases with three other compounds (but-1-yne, but-2-yne and propyn-1-ol) giving weaker inhibitions. The inhibition pattern of methane oxidation by whole cell suspensions and cell-free extracts of M. capsulatus (Bath) is discussed and reasons for the prominent results are suggested.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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