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  • 1990-1994  (1)
  • 1975-1979
  • 1970-1974  (1)
  • 12.20.Fv  (1)
  • Cerebral Metabolism  (1)
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  • 1990-1994  (1)
  • 1975-1979
  • 1970-1974  (1)
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Psychopharmacology 35 (1974), S. 169-177 
    ISSN: 1432-2072
    Schlagwort(e): Isolated Rat Brain ; Methods ; Perfusion ; Cerebral Metabolism ; Animal EEG
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract An isolated perfused brain preparation is regarded as offering some important advantages over intact animals or tissue slices for studying drug effects on the CNS. The rat is by far the most suitable laboratory animal for this technique because of low cost, ease of preparation and extensive literature available for comparative purposes. In this paper various preparation techniques and perfusion systems for an isolated rat brain are reported. Investigations are presented proving the viability of the isolated perfused rat brain for more than seven hours and its suitability for studies on cerebral metabolism. Until now this preparation has been successfully used for pharmacological investigations concerning the drug effects on cerebral energy metabolism, on the EEG and on the biogenic amines in the CNS. The results further demonstrate that the use of an isolated perfused rat brain affords the possibility of clarifying pharmacological problems which has not been possible using conventional methods. In addition, this preparation should become a very useful tool for studies on pharmacokinetics, on brain circulation or on brain oxygen consumption.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1434-601X
    Schlagwort(e): 12.20.Fv ; 13.10.+q ; 14.80.Pb
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The cross sections for Bhabha and Møller scattering have been investigated in the energy range 2.1–2.4 MeV using monoenergetic positrons and electrons to search for hypothetical resonances superimposed to the continuum predicted by quantum electro dynamics. Bhabba-to-Mott, Møller-to-Mott and Møller-to-Bhabha cross section ratios were measured. The Bhabha-to-Mott ratios could be determined with statistical errors of typically 1% and remaining systematic errors not exceeding the statistical ones. No resonances in Bhabha scattering were observed. Limits for the intrinsic widths of hypothetical resonances are given. For the first time upper limits are deduced from our data for hypothetical resonances in the Møller scattering cross section in the MeV range. Additionally, Møller-to-Bhabha cross section ratios could be determined with good precision. A good agreement between the experimental and theoretical Møller-to-Bhabha ratios can be stated calling in question the recently predicted existence of series of narrow, unresolvable resonances in the Bhabha scattering cross section.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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