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  • 1
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Plant Physiology 34 (1983), S. 389-417 
    ISSN: 0066-4294
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1435-2451
    Keywords: Liver surgeryv ; Regional perfusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Leber des Hundes wurde von der Gefäßversorgung abgeriegelt, mit Hilfe eines neu entwickelten Kathetersystems und eines Perfusionsaggregates 1 h normotherm und in Rezirkulation perfundiert. Kreislaufparameter, Blutgasanalysen und Gewebsgehalte der Stoffwechselmetabolite wurden zur Beurteilung der Methode herangezogen. Das venöse Blut aus der unteren Körperhälfte und dem portalen Stromgebiet (1,113 l/min) konnten über das Kathetersystem zum Herzen zurückgeführt werden, so daß der mittlere arterielle Systemdruck im Normbereich blieb. Bei einem Perfusionsfluß durch die Leber von 0,55 ml/min/g und einem Perfusionsdruck von 10 cm H2O war eine ausreichende Sauerstoffzufuhr gewährleistet, welcher auch in den Blutgasanalysen und in den Stoffwechseluntersuchungen zum Ausdruck kam. Mit der Anwendung einer Farbstoffverdünnungsmethode wurde die Kreislaufisolierung der Leber geprüft; dabei waren lediglich Leckmengen von 6–7% des gesamten Perfusionskreislaufvolumens festzustellen. Das neue Verfahren ermöglicht eine einstündige, normotherme, isolierte Leberperfusion ohne das gesunde Gewebe irreversibel zu schädigen.
    Notes: Summary The canine liver was isolated from its blood supply and perfused for one hour normothermically by means of a new catheter and a perfusion system consisting of oxygenator, pump and heat-exchanger. Hemodynamic parameters, blood gas analyses, and tissue metabolites were evaluated during the experiments. The venous return from the lower body and portal vein (1.113 1/min) could be maintained with the catheter system so that the mean systemic arterial pressure was within normal limits. With a perfusion rate through the liver of 0,55 ml/min/g and perfusion pressure of 10 cm H2O there was an adequate tissue perfusion; this was also shown by blood gas analyses and tissue metabolite concentrations. Using dye dilution methods the isolation of the liver was tested. This showed a leakage of 6–7% of the total perfusion volume. This new method makes it possible to carry out an isolated, normothermic, liver perfusion for one hour without irreversible tissue damage.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 319 (1984), S. 848-848 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 5 (1983), S. 235-238 
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: For the description of reactions between solids and gases it is important to investigate the compositional changes in the surface of the solid as a function of temperature and reaction time. Conventional methods of surface analysis cannot be applied in such investigations under atmospheric pressure. We have used the techniques of thermal analysis by emission spectrography (TESG) and of X-ray photoelectron spectroscopy (ESCA). Work with aggressive gases under atmospheric pressure was done in a special reactor, connected by a vacuum-lock directly to the ESCA spectrometer. Thus we have been able to establish characteristic reaction temperatures in the BCl3/H2/steel system and to assign them to certain surface changes. From that a model for the initial phase of the formation of the boride layer on a plain carbon steel has been derived.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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