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  • Chemistry  (1)
  • Peroxidase  (1)
  • thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TC Biochemical engineering::TCB Biotechnology  (1)
  • 1
    Publication Date: 2024-04-11
    Description: Biotechnology
    Keywords: Technology, engineering, agriculture ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TC Biochemical engineering::TCB Biotechnology
    Language: English
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 114 (1971), S. 253-261 
    ISSN: 1432-0878
    Keywords: Conjunctival Epithelium ; Guinea-Pig ; Peroxidase ; Diffusion Barrier
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Die Resorptionsfähigkeit des Konjunktivalepithels vom Meerschweinchen wurde nach verschieden langer Einwirkung (5–120 min) elektronendichter Markierungssubstanzen (Thoriumdioxyd, Goldsol, Ferritin, Peroxydase) geprüft. Alle Substanzen werden in geringen Mengen aus dem Konjunktivalsack resorbiert, Peroxydase nach 10 min, die übrigen Tracer nach 20 min. Eine Vorbehandlung mit EDTA-haltigen Spüllösungen ändert diese Ergebnisse nicht. Die Prüfung der Verteilung subepithelial injizierter Thoriumdioxydund Peroxydaselösungen 10 min nach Injektion ergibt, daß Thoriumdioxyd als umschriebenes Depot liegen bleibt, während Peroxydase gut diffundiert und die Interzellularräume bis zu den Zonulae occludentes gleichmäßig erfüllt. Eine Phagocytose der Tracer durch Epithelzellen ist auch hier nur in geringen Mengen nachweisbar. Das Konjunktivalepithel ist eine Barriere gegen die Aufnahme der verwendeten Markierungssubstanzen in die Bindehaut.
    Notes: Summary The resorption capability of the guinea pig conjunctival epithelium was studied applying electron dense markers (thoriumdioxide, colloidal gold, ferritin, peroxidase) for 5–120 min. All these substances are resorbed in small amounts from the epithelial surface; peroxidase after 10 min, the other markers after 20 min. Pretreatment with EDTA-containing solutions does not alter these results. Studying the localization of subepithelial injected thoriumdioxide- or peroxidase solutions 10 min after the injection shows that the thoriumdioxide remains confined to the site of injection, while peroxidase penetrates the epithelial intercellular space up to the zonulae occlndentes. A tracer uptake by phagocytosis into the epithelial cells is seen very rarely under these conditions. Thus, the epithelial layer is a barrier, preventing the diffusion of the used tracers into the conjunctiva.
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 136 (1933), S. 202-204 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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