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  • 1985-1989  (2)
  • 25.70.Jj  (1)
  • Denervation  (1)
  • Polymer and Materials Science
  • 1
    Electronic Resource
    Electronic Resource
    Cholinergic but not monoaminergic denervation increases nerve growth factor content in the adult rat hippocampus and cerebral cortex (1986)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 334 (1986), S. 346-351 
    Details
    ISSN: 1432-1912
    Keywords: Nerve growth factor (NGF) ; Rat basal forebrain ; Cholinergic neurons ; Monoaminergic neurons ; Denervation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We have investigated whether degeneration of basal forebrain cholinergic neurons is a potential trigger for increased NGF production in the adult rat brain. Electrolytic lesions of cholinergic neurons in the septum-diagonal band and in the nucleus basalis of Meynert induced a transient increase in NGF in the ventral hippocampus (+70%) and cerebral cortex (+125%), respectively. In contrast, selective aminergic denervation of the forebrain by electrolytic lesion of the medial forebrain bundle, did not increase NGF levels in hippocampus and cerebral cortex. Thus, a cholinergic mechanism appears to regulate NGF production in adult rat basal forebrain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00569368
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Evidence for quasi-fission in40Ar+208Pb collisions near the coulomb-barrier (1987)
    Springer
    The European physical journal 326 (1987), S. 313-326 
    Details
    ISSN: 1434-601X
    Keywords: 25.70.Jj
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Fission-fragment angular distributions were measured in the reaction of40Ar with208Pb near the fusion barrier. For nearly symmetric mass-/charge splits we find angular distributions symmetric around θ=90 degrees, however, with unusually large anisotropies. These develop gradually into forward-backward asymmetric distributions as one moves away from mass-/charge symmetry. This indicates that non-compound fission (‘quasi-fission’) competes with true fusion-fission. The relative contribution of quasi-fission to the total fission cross section is somewhere between 51 and 85%. In the framework of the extra-push model this is equivalent to an extra-extra push energy for compound-nucleus formation inside the true fission saddle point of 4〈E xx 〈9 MeV in agreement with a recent empirical parametrization of fusion-barrier shifts based on fusion-fission cross sections. On the basis of cross sections for fusion-evaporation residues it had previously been concluded that fusion of40Ar with Pb isotopes occurs unhindered. Possible reasons for this apparent discrepancy are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01297586
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    Paper (German National Licenses)
    Fulltext
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