Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1975-1979  (4)
  • Hydra  (2)
  • Head formation  (1)
  • Rattenpfote  (1)
  • 1
    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
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Development genes and evolution 183 (1977), S. 193-206 
    ISSN: 1432-041X
    Keywords: Hydra mutant ; Morphogenetic substances ; Head formation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A mutant ofHydra attenuata is analysed, theaberrant, which is distinct from the wild type in having a smaller head with fewer tentacles and only half the number of head-specific cells. The rate of head and foot regeneration and the doubling time are slower inaberrants than in normal hydra. The lower head-forming potential is paralleled by a reduced concentration of head-specific morphogens: compared to the wild type, in theaberrant the concentration of head activator is reduced to 70% in the head and to 50% in the body, the concentration of head inhibitor is reduced to 50% in the head and to 80% in the body. Theaberrant is more sensitive (3 times) to added head activator and less sensitive (〉5 times) to added head inhibitor than the wild type. The slower rate of foot regeneration is paralleled by a lower content of foot-specific morphogens: compared to the wild type, in theaberrant the foot activator is reduced to 40% and the foot inhibitor to 70%.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    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
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Development genes and evolution 180 (1976), S. 287-295 
    ISSN: 1432-041X
    Keywords: Hydra ; Head regeneration ; Morphogenetic substances
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Hydra regenerating heads release at least two substances into the surrounding medium: one stimulates and one inhibits head formation. The inhibitor is released mainly during the first hour after cutting, the activator is released more slowly with a maximum in the second hour and with substantial release still during the following six hours. The release of both substances seems to be specific for head regeneration: it is not found in animals regenerating feet. The sequential release of these substances leads to the early changes observed at the cellular level during head regeneration inhydra: the inhibitor produces a decrease, the activator an increase in the mitotic activity of interstitial and epithelial cells, if assayed on intact animals. Head regeneration is blocked, if the release of the head activator is prevented. It is therefore suggested that these substances are necessary to initiate head regeneration inhydra.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...