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  • 1965-1969  (5)
  • 1905-1909  (1)
  • 1967  (5)
  • 1909  (1)
Material
Years
  • 1965-1969  (5)
  • 1905-1909  (1)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 16 (1967), S. 57-64 
    ISSN: 1432-0584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The ultrastructure of megakaryocytes in different stages of maturation from normal human bone marrow is described. The authors propose a possible mechanism of platelet release by the megakaryocyte.
    Abstract: Zusammenfassung Beschreibung der Ultrastruktur von Megakaryozyten des normalen menschlichen Knochenmarks in ihren verschiedenen Reifestadien. Eine Hypothese über den Mechanismus der Liberation der Plättchen aus den Megakaryozyten wird aufgestellt.
    Notes: Résumé Description de l'ultrastructure des mégacaryocytes de la moelle osseuse humaine normale dans leurs différents stades de maturation. Les auteurs formulent une hypothèse sur le mécanisme de la libération des plaquettes par le mégacaryocyte.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Histochemistry and cell biology 9 (1967), S. 58-67 
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé Les auteurs, dans le cadre d'une étude ultrastructurale du foie foetal humain, ont utilisé une méthode directe à pH 8 pour mettre en évidence l'activité de la phosphatase alcaline. L'accumulation du produit final de la réaction histochimique (phosphate de plomb) a pu être observée de façon constante sur les membranes plasmatiques des hepatocytes et des érythroblastes. Dans la lignée érythropoïétique les dépôts sont toujours plus intenses sur les cellules les plus immatures. Les auteurs ont observé également des dépôts importants de phosphate de plomb dans certains ≪granules≫ péribiliaires ainsi que dans des ≪granules≫ des cellules érythropoïétiques. La disposition des dépôts le long des membranes cellulaires et dans certains organites cytoplasmiques est discutée en fonction de la technique de mise en évidence.
    Notes: Summary A direct lead method for visualization of alkaline phosphatase activity at pH 8 was used in an electron microscope study of the foetal development of human liver. An accumulation of lead phosphate, the final product of the enzymatic reaction, was observed on the cell membranes of hepatocytes and also on those of erythroblasts, especially in immature cells. An intense reaction was observed in peribiliary granules and in granules of the erythropoietic cells. The localization of lead phosphate precipitate along the cell membranes and in some cytoplasmic bodies is discussed in relation to the procedure used.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 78 (1967), S. 267-279 
    ISSN: 1432-0878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The hepatocytes of 15 liver biopsies from 13 patients suffering from nonhemolytic constitutional jaundice were studied with respect to the presence of mitochondria with fibrillary inclusions or with vacuoles and to the presence of «paracrystalline cytoplasmic inclusions». Intramitochondrial fibrillary inclusions were found in all cases in quite various proportions, from 1 to 45% of the observed organelles. Intramitochondrial vacuoles were less frequent: they were observed only in three cases, and in one case only in more than 10% of the organelles. Mugnaini's paracrystalline inclusions, dispersed in the cytoplasm of the hepatocytes without outer membranes, were abundant in two cases. None of these morphological characters could be considered as pathognomonic and their origin is unknown: nevertheless their repartition in human liver in pathological conditions seems worthy of further study.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 84 (1967), S. 311-318 
    ISSN: 1432-0878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé Les auteurs, étudiant les diverses cellules épithéliales rencontrées dans la région périportale du foie foetal humain, décrivent deux types d'éléments qui possèdent des caractères ultrastructuraux intermédiaires entre ceux de la cellule épithéliale biliaire et ceux de l'hépatocyte. Ils décrivent un type cellulaire à cytoplasme et noyau fortement denses, différents de ceux que l'on observe dans les «dark cells» de Steiner et coll. (1962b).
    Notes: Summary The fine structure of the different cells at the margin of the portal spaces was investigated in the foetal human liver. Two types of cells intermediate between biliary epithelial and parenchymal elements were described. In addition, a type of cell in which both the cytoplasm and nucleus are electron-dense was observed. This element is different from the dark cell of Steiner et al. (1962b).
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 84 (1967), S. 319-327 
    ISSN: 1432-0878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé Les auteurs, étudiant les régions périportales et centrolobulaires des foies d'un embryon et de quatre foetus humains, tendent à préciser quelques aspects de la formation des canaux biliaires intrahépatiques. Ils apportent ainsi une nouvelle contribution à la théorie hépatogène de la cholangiogénèse intrahépatique.
    Notes: Summary The present study describes the fine structure of tubules surrounded by parenchymal or biliary epithelial cells at the margin of the centrolobular or portal spaces. The hepatogenic theory of intrahepatic cholangiogenesis is discussed.
    Type of Medium: Electronic Resource
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