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  • 1975-1979  (4)
  • 1979  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Development genes and evolution 187 (1979), S. 323-328 
    ISSN: 1432-041X
    Keywords: Nerve-depletedhydra ; Morphogenetic substances
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary By a double colchicine treatment the nerve-cell population ofhydra was reduced to less than 1% of the normal complement. Such severely nerve-depletedhydra contained normal or higher than normal concentrations of head activator, head inhibitor, foot activator and foot inhibitor which in normal animals are produced by nerve cells. According to typical chromatographic properties all four morphogenetic substances were chemically identical to those found in normal animals. It is suggested that in nervedepletedhydra the epithelial cells, as the only remaining cell type, have taken over the morphogen-producing function of nerve cells.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Development genes and evolution 186 (1979), S. 139-149 
    ISSN: 1432-041X
    Keywords: Hydra ; Morphogenetic substances ; Regeneration ; Budding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A procedure is presented by which four previously described morphogenetic substances can be purified from hydra: an activator and an inhibitor of head formation and an activator and an inhibitor of foot formation. We show that all four substances act specifically. At low concentrations, the head factors only influence head and not foot formation, and the foot factors only influence foot and not head formation.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 278 (1979), S. 365-367 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Gene Il-protein was purified from Escherichia coli cells '? ? WIthPhaSe fd mutan* in gene V using the stimulation of DNA synthesis on fd RFI as an assay. The purification steps were ammonium sulphate precipitation and various columns Details of the isolation procedure will be published ...
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1433-8580
    Keywords: Edema, traumatic ; Rat paw ; Ödem, traumatisches ; Rattenpfote
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Berichtet wird über ein Versuchsmodell, das es zuverlässig ermöglicht, am Beispiel des Rattenpfotentestes ein posttraumatisches Ödem mit hoher Volumenausbeute und sicherer Reproduzierbarkeit unter größtmöglicher Gewebeschonung zu erzeugen. Das Ödem wird durch Quetschen der Rattenhinterpfote unter standardisierten Bedingungen in einer Wringe mit gegenläufigen Holzwalzen induziert und volumetrisch gemessen. Die Ergebnisse werden diskutiert und denen anderer Versuchsmodelle gegenübergestellt.
    Notes: Summary A standardized reproducible technique is reported for inducing traumatic edema in the rat paw showing considerable swelling volume and low tissue damage. The edema is measured volumetrically subsequent to squashing the rat paw under standardized conditions in a wringing-machine with two wooden rollers. The technique is compared with other methods.
    Type of Medium: Electronic Resource
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