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  • 1990-1994  (2)
  • 42.70.-a  (1)
  • Rearterialization  (1)
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  • 1990-1994  (2)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 55 (1992), S. 144-148 
    ISSN: 1432-0649
    Keywords: 42.70.-a ; 78.20.-e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Fluorescence at 3 μm and 545 nm in a YAlO3:Er (30 at.%) crystal has been measured as a function of wavelength, intensity and polarization for the excitation in the 800 nm wavelength region. Emission at 545 nm is an indicator of losses for 3 μm emission due to excited-state absorption and upconversion. The experimental results allow to determine the excitation mechanisms, the upconversion coefficient W 2 and the optimum pump wavelengths to generate 3 μm radiation.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 377 (1992), S. 360-367 
    ISSN: 1435-2451
    Keywords: Orthotopic liver transplantation ; Rat ; Rearterialization ; Proliferation kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In der Ratte kann eine orthotope Lebertransplantation (OLT) ohne arterielle Anastomose des Transplantats durchgeführt werden. In der vorliegenden Studie haben wir die Proliferationskinetik von Leberparenchymzellen nach einer OLT mit und ohne arteriellen Wiederanschluß mittels Bromo-2-deoxyuridin untersucht. Tiere mit einer reinen portokavalen Anastomose zeigten hierbei eine signifikant erhöhte Proliferationsrate von Hepatozyten, Kupffer-Sternzellen und Gallengangsepithelzellen, erkennbar an einer starken Anfärbung mit BrdU am 8. Tag post transplantationem, im Vergleich zu Tieren mit einem arteriellen Wiederanschluß. Dies läßt auf eine ausgeprägte Regeneration und Proliferation von ischämisch geschädigten Leberparenchymzellen nach einer rein portokavalen Anastomose schließen. Die OLT mit arteriellem Wiederanschluß scheint daher auch bei der Ratte das physiologischere Transplantationsmodell zu sein.
    Notes: Abstract Successful orthotopic liver transplantation (OLT) can be achieved in the rat. We used bromo-2-deoxyuridine (BrdU) as a proliferation marker to document morphological differences between OLT with and without rearterialization. Animals with portal anastomosis alone had a significantly increased proliferation rate of hepatocytes, Kupffer cells, and bile duct epithelial cells, as indicated by strong staining with BrdU, 8 days post-transplant compared to animals with rearterialization. Regeneration of ischemically damaged liver parenchymal cells may account for this observation. Thus, OLT with rearterialization appears to be the more physiological transplant model.
    Type of Medium: Electronic Resource
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