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  • 1965-1969  (3)
Materialart
Erscheinungszeitraum
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Naturwissenschaften 55 (1968), S. 393-393 
    ISSN: 1432-1904
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie , Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Cell & tissue research 97 (1969), S. 564-575 
    ISSN: 1432-0878
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The ultrastructure of the Paraventricular organ in the hypothalamus of Xenopus laevis tadpoles is described. It appeares that the Paraventricular organ of this anuran species is homologous with the Organon vasculosum hypothalami or the Paraventricular organ of other vertebrates. The Paraventricular organ of Xenopus laevis is characterized by an ependymal lining with only few cilia and by two types of nerve cells. Both types of nerve cells have ventricular processes, protruding into the lumen of the third ventricle and forming a network. The protrusions bear cilia of the 8+1 pattern. It has been possible to distinguish both types of nerve cells on account of their dense-core vesicles. A secretory function of both cell types is suggested. In a region close to the Paraventricular organ, another granulated type of nerve cell has been observed. A relationship between these cells and the preoptic nucleus is discussed.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Cell & tissue research 83 (1967), S. 441-448 
    ISSN: 1432-0878
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Using a modified Alcian blue/Alcian yellow method, differences in stainability in the fibres of the preoptic-hypophyseal tract of Rana temporaria were observed. Near the preoptic nucleus most of the fibres stained yellow, in the tract the fibres stained lightgreen or showed green inclusions on a yellow background, whereas at the fibre-endings a colour switch to blue-green was found. This colour switch was the most pronounced in the neural lobe, where the neurosecretion stained blue-green, whereas in the fibre-endings in the outer zone of the median eminence a colour switch to green was noticed. The results can best be explained with the assumption that a modification or transformation of the neurosecretion occurs during its transport from the preoptic nucleus to the fibre-endings. Literature related to this hypothesis is discussed.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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