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
  • 1960-1964  (2)
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 3 (1964), S. 480-489 
    ISSN: 1432-0533
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 1. Mittels histochemischer Methoden wurden Aktivität und Lokalisation von oxoreduktiven und gewissen hydrolytischen Enzymen im Plexus chorioideus des Hühnerembryo zwischen dem 35. und 46. Entwicklungsstadium untersucht. 2. Ein Anstieg der Enzymaktivität mit zunehmendem Alter wurde im Plexus chorioideus gefunden; eine Ausnahme bildete die Cytochrom-oxydase, die eine ungefähr gleichbleibende Aktivität zeigte. 3. Auffallend war die Lokalisation der oxoreduktiven und hydrolytischen Enzyme im Bürstenbesatz der Epithelzellen des Plexus chorioideus,-vornehmlich im 40. Entwicklungsstadium. 4. Die Lokalisation verschiedener Enzymsysteme könnte mit den Phänomenen des aktiven Transportes im Plexus chorioideus in Verbindung stehen.
    Notes: Summary 1. By use of histochemical methods the activity and localization of oxo-reductive enzymes and certain hydrolytic enzymes in chick embryo choroid plexus in between the 35 to 46th stage of development was studied. 2. An increase of enzyme activity with increasing age was found in the choroid plexus with the exception of cytochrome oxidase, which revealed activity of a fairly constant level. 3. The localization of oxoreductive and hydrolytic enzymes on the brush borders of epithelial cells of the choroid plexus especially at the 40th stage of development was prominent. 4. The localization of the various enzyme systems may be related to the active transport phenomena in the choroid plexus.
    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
    Acta neuropathologica 2 (1963), S. 482-490 
    ISSN: 1432-0533
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Röntgenbestrahlung des Rattenkopfes hatte im Gehirn die Anhäufung von histochemisch nachweisbaren PAS-positiven Granula zur Folge, die sich als Glykogen erwiesen. Die Glykogen-Granula fanden sich hauptsächlich in Gliazellen; sie traten nicht in Nervenzellen auf. Die Anzahl der Glykogen-Granula war ungefähr proportional der verabreichten Strahlendosis. Obgleich das Vorkommen derartiger Veränderungen unter den Bedingungen von ionisierenden Teilchenbestrahlungen bekannt ist, stellt dies den ersten Nachweis nach Röntgenbestrahlung dar. Quantitative chemische Analysen des Gehirnes mittels der Glucose-Oxydase-Methode zeigten — 24 Std nach Applikation von 3.000 r — einen Anstieg des Glykogengehaltes um ca. 40%.
    Notes: Summary X-irradiation of the head of rats resulted in the accumulation of histochemically demonstrable PAS-positive granules in the brain, which were identified as glucogen. The glycogen granules were confined predominantly to the neuroglial cells; they did not appear in neurons. The amount of glycogen granules was approximately proportional to the dose administered. Although such changes are known to occur under conditions of ionizing particle radiation, this is the first demonstration that they appear following X-irradiation. Quantitative chemical analysis of the brains by the glucose oxydase method demonstrated an increase of glycogen of approximately 40%, 24 hours after exposure to 3.000 r. The biochemical change responsible for the glycogen accumulation may consist in an impairment of the enzymes mediating the incorporation and release of glucose from glycogen.
    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...