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  • Fluorescence microscopy  (2)
  • Bone
  • Springer  (3)
  • American Physical Society
  • Annual Reviews
  • Cell Press
  • International Union of Crystallography
  • Oxford University Press
  • 2010-2014
  • 1970-1974  (3)
  • 1945-1949
  • 1940-1944
  • 2012
  • 1973  (3)
  • 1969
  • 1945
Collection
Publisher
  • Springer  (3)
  • American Physical Society
  • Annual Reviews
  • Cell Press
  • International Union of Crystallography
  • +
Years
  • 2010-2014
  • 1970-1974  (3)
  • 1945-1949
  • 1940-1944
  • 1965-1969  (5)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 12 (1973), S. 8-15 
    ISSN: 1432-0827
    Keywords: Insulin ; Bone ; Calcium ; Resorption ; Orthophosphate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Description / Table of Contents: Résumé L'administration d'insuline cristallisée à des rats thyroparathyroidectomisés provoque une augmentation de la calcémie et de la phosphorémie. Le calcium plasmatique s'élève de façon linéaire entre 31 et 250 m Unités d'insuline/100 g de poids corporel. La courbe obtenue n'est guère différente de celle obtenue par extrait parathyroidien. L'administration simultanée d'insuline et d'extrait parathyroidien à des rats thyro-parathyroidectomisés agit sur la calcémie et la phosphorémie par un effet additif. Lorsque des os frontaux d'embryons de poulet sont cultivésin vitro en présence d'insuline cristallisée, le taux de résorption augmente. L'insuline augmente le taux de consommation en glucose des explants et induit une accumulation de citrate dans le milieu de culture. L'insuline stimule donc la résorption osseuse.
    Abstract: Zusammenfassung Der Plasmagehalt an Calcium und Phosphor bei thyroparathyreoidektomierten Ratten wurde durch die Verabreichung von kristallinem Insulin erhöht. Das Plasmacalcium verhielt sich zwischen 31 und 250 m Einheiten Insulin pro 100 g Körpergewicht linear. Die Steigung der erhaltenen Kurve ist nicht signifikant verschieden von derjenigen, die nach Parathyreoidea-Extrakt erhalten wird. Die gleichzeitige Verabreichung von Insulin und Parathyreoidea-Extrakt von thyroparathyreoidektomierten Ratten hatte eine kumulative Wirkung auf den Gehalt von Calcium und Phosphor im Plasma. Wenn Stirnbeine von Kükenembryos mit kristallinem Insulinin vitro kultiviert wurden, erhöhte sich die Resorptionsrate. Das Insulin steigerte den Glucoseverbrauch der Explantate und verursachte eine Anreicherung von Citrat im Kulturmedium. Die Ergebnisse deuten auf eine Stimulation der Knochenresorption durch Insulin.
    Notes: Abstract the administration of crystalline insulin to thyroparathyroidectomized rats raised their calcium and phosphorus plasma levels. The plasma calcium gave a linear response between 31 and 250 mU of insulin/100 g body weight. The slope obtained is not significantly different from that obtained with parathyroid extract. The simultaneous administration of insulin and parathyroid extract to thyroparathyroidectomized rats affected the calcium and phosphorus plasma levels in an additive fashion. When chick embryo frontal bones were cultivatedin vitro with crystalline insulin the rate of resorption increased. Insulin increased the rate of glucose consumption by the explants and induced the accumulation of citrate in the culture medium. It is concluded that insulin stimulates bone resorption.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0878
    Keywords: Noradrenergic nerves ; Chicks ; 6-hydroxydopamine ; Degeneration ; Regeneration ; Fluorescence microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The fluorescence histochemical method of Falck and Hillarp for the cellular localisation of biogenic amines was used to follow the disappearance and reappearance of peripheral noradrenergic nerves in the chick after treatment with 6-hydroxydopamine. With certain exceptions, it seemed that the disappearance and reappearance of the nerves was due to their degeneration and subsequent regeneration. However, there was not a uniform destruction of the noradrenergic nerves associated with different effector tissues. The extent of degeneration was greater in older than in younger chicks following equivalent doses of the drug, possibly indicating a greater uptake efficiency of the older nerves. It appeared that the noradrenergic nerves in the younger chicks regenerated more rapidly than those of older chicks, but in none of the animals studied were there any obvious morphological modifications of the regenerating nerves.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0878
    Keywords: Auerbach's plexus ; Avian gizzard ; Noradrenergic neurones ; Nonadrenergic inhibition ; Fluorescence microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Fluorescence histochemical observations on Auerbach's plexus of the avian gizzard have confirmed the presence of catecholamine-containing cell bodies. These cell bodies have many of the morphological and pharmacological characteristics of noradrenergic neurones, but some of the cell processes appear to be markedly resistant to the destructive action of 6-hydroxydopamine. These findings are discussed in the light of current ideas about the innervation of the gut.
    Type of Medium: Electronic Resource
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