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  • 1
    Electronic Resource
    Electronic Resource
    The theoretical small signal impedance of the frog node,Rana pipiens (1976)
    Springer
    Pflügers Archiv 366 (1976), S. 273-276 
    Details
    ISSN: 1432-2013
    Keywords: Frog node ; Small signal impedance ; Membrane noise
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The small signal impedance of the frog node is calculated for frequencies from 1 Hz to 10,000 Hz and transmembrane potentials from −80 mV to −30 mV by linearizing the voltage clamp equations of Dodge [7] and Hille [8]. The modulus of the impedance is presented for the total system, and separately for the potassium and sodium systems as a function of frequency and voltage. There is a broad resonance in the total impedance with a voltage-dependent peak frequency. At 22°C, in the range −75 mV to −45 mV, the peak frequencies occur between 50 and 500 Hz. Removing the potassium system leaves a relatively shapr resonance centered around 200 Hz at −45 mV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00585890
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Localization of dopamine in the endocrine hypothalamus of the rat (1976)
    Springer
    Cell & tissue research 166 (1976), S. 461-473 
    Details
    ISSN: 1432-0878
    Keywords: Arcuate-periventricular region ; (rat) ; Microspectrofluorometry ; Electron microscopic autoradiography ; Radiolabeled dopamine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Microspectrofluorometry, fluorescence histochemistry and light and electron microscopic autoradiography have established the presence of sub-populations of neurons in the arcuate-periventricular region of the rat hypothalamus that sequester both radiolabeled dopamine and demonstrate formaldehyde-induced fluorescence. These characteristics are consistent with a catecholaminergic function. Selective sequestration of 3H-dopamine at the light and ultrastructural level is discussed in the context of an ultrashort loop autoregulatory mechanism for this neuronal population.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00225911
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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