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  • 1970-1974  (2)
  • 1965-1969  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 17 (1970), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract— In cerebral myelin from man, ox, rabbit, guinea pig and chicken, the amounts of proteolipid protein, basic protein and the fraction of further protein components were found to be present in a fixed ratio of 5·0: 3·5: 2·0 by weight. The molecular weights of 25,000 and 35,000 as obtained for the basic protein and proteolipid protein might indicate that cerebral myelin contains one molecule of basic protein per molecule of proteolipid protein. This fixed ratio of protein components was found to be changed in myelin from the PNS and in cerebral myelin from rat and carp, with their exceptional basic proteins. Using the polyacrylamide-gel electrophoresis it was possible to demonstrate that a homogeneous structural protein (the Folch-Lees proteolipid protein) constitutes about 50 percent of the total amount of myelin proteins in all species studied. An attempt was made to correlate myelin protein and lipid patterns from various species.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 27 (1971), S. 78-79 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Der Einfluss der trunkulären Vagotomie wurde an der gastrischen Mukosa von Hunden elektronenmikroskopisch untersucht. Dabei kommt es zu einer sehr deutlichen Verengung der Kapillaren mit Abweichungen der Endothelzelle von der Normalstruktur. Der ischämische Effekt der Vagotomie setzt sofort ein und ist nach 4 Wochen fast vollständig aufgehoben.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 25 (1969), S. 486-487 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Die Rattenepiphyse von Tieren, die 30 Tage lang einer ständigen Belichtung von 70 Lux Stärke ausgesetzt worden waren, wurde elektronen-optisch untersucht. Alle Tiere wiesen mitochondriale Veränderungen der Pinealozyten auf. Diese Veränderungen sind vermutlich auf den erhöhten Serotoninstoffwechsel zurückzuführen, der durch die ständige Belichtung induziert wird, da die Kontrolltiere keine derartigen Abartigkeiten zeigten.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 13 (1969), S. 157-168 
    ISSN: 1432-0533
    Keywords: Gangliosides ; Tay-Sachs Disease ; Brain Subcellular Localization ; Hale Stain ; Electron Microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Reaktion von kolloidalem Eisen mit Sialomucinen (Hale stain) wurde zur elektronenmikroskopischen Darstellung der neuraminsäurehaltigen Ganglioside in den subcellulären Fraktionen des Gehirns angewandt. Zunächst wurde mit Hilfe tritiummarkierter Ganglioside überprüft, ob bei der Gewinnung subzellulärer Fraktionen Ganglioside nicht unspezifisch subcellulär adsorbiert werden. Eine nennenswerte Adsorption konnte ausgeschlossen werden. Das Verfahren wurde zuerst auf die aus Meerschweinchengehirnen isolierten Fraktionen angewandt. Da Nervenendigungen, Mitochondrien und Synapsenbläschen Hale-positiv reagierten, dienten Enzyminkubationen mit Neuraminidase und Hyaluronidase zur Differenzierung von anderen Hale-positiven sauren Substanzen. Schließlich wurde die Methode auf die cytoplasmatischen multilamellären Körperchen (MCB) übertragen, die aus Gehirnen an Tay-Sachs'scher Krankheit Verstorbener isoliert wurden. Aus den Versuchen konnte abgeleitet werden, a) daß die Hale-Färbung auch Ganglioside anfärbt, b) daß Ganglioside auf der Oberfläche der Membran von den multilamellären Körperchen und mit hoher Wahrscheinlichkeit auch auf der Membran der Nervenendigungen lokalisiert sind, c) daß die Synapsenbläschen eine positive Reaktion ergeben, die jedoch nicht mit Sicherheit auf vorhandene Ganglioside zurückgeführt werden kann, d) daß die äußere Mitochondrienmembran Hale-positive Substanzen enthält, deren Natur unbekannt ist.
    Notes: Summary The reaction of colloidal ferric oxide with sialomucins (Hale stain) was applied to sialic acid-containing gangliosides in subcellular fractions of the brain, in order to investigate their localization by electron microscopy. Prior to all experiments, a check was made, by means of tritium-labeled ganglioside, to confirm that the ganglioside content in the subcellular particles was not the result of an unspecific adsorption during the isolating procedure. No considerable unspecific adsorption could be registered. Hale stain was first applied to subcellular fractions obtained from guinea-pig brains. Since nerve-endings, mitochondria and synaptic vesicles gave a positive staining reaction, incubations with neuraminidase and hyaluronidase were carried out in order to achieve a differentiation. Finally, the method was applied to the membranous cytoplasmic bodies (MCB) which were isolated from the brain of a patient with Tay-Sachs disease. It was concluded that: a) Hale stain stains gangliosides also, b) gangliosides are localized in the membrane of membranous cytoplasmic bodies and also very probably in the membrane of nerve-endings, c) synaptic vesicles give a Hale-positive reaction which cannot with certainty be attributed to gangliosides, d) the outer membrane of mitochondria contains Hale-positive substances, the nature of which is not known.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 76 (1967), S. 100-107 
    ISSN: 1432-0878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Electron microscopical studies dealt with the reversible action of Ro4-1284 on norepinephrine and serotonin with respect to the granulated vesicles of the ventromedial hypothalamus and the pineal body of the rat. In the normal rat various types of vesicles were classified according to their size and form. In the hypothalamus two types of granulated vesicles were distinguished from the ungranulated ones. In the pineal gland granular and agranular vesicles have the same diameter; in addition to them large granular vesicles were also to be found. After the application of Ro4-1284 the same types of vesicles appear, which are almost totally deprived of their osmiophilic content. Homogeneous vesicles partially containing membranous bodies remain. The results were interpreted as a visible depletion of norepinephrine and possibly serotonin from their pools which leave behind elements capable of becoming functionally active after the action of the depleting agent.
    Type of Medium: Electronic Resource
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