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  • 1
    Electronic Resource
    Electronic Resource
    Mapping the fermi surface of graphite with a display-type photoelectron spectrometer (1991)
    Springer
    Applied physics 52 (1991), S. 299-301 
    Details
    ISSN: 1432-0630
    Keywords: 79.60.Cn ; 71.25.Pi ; 71.25.Hc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A display spectrometer is used to image the momentum distribution of photoelectrons from the Fermi level in graphite. The Fermi “surface” consists of six points at the corners K of the hexagonal, two-dimensional Brillouin zone, in agreement with band theory. The method is also applied to other equal energy surfaces below the Fermi level, thereby giving the band dispersion of the π-bands.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00324768
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  • 2
    Electronic Resource
    Electronic Resource
    Interleukin-2 lengthens extrajunctional acetylcholine receptor channel open time in mammalian muscle cells (1991)
    Springer
    Pflügers Archiv 419 (1991), S. 380-385 
    Details
    ISSN: 1432-2013
    Keywords: Interleukin-2 ; Neuromodulation ; Dissociated muscle fibres ; C2 myotubes ; Extrajunctional nAChR ; Electrophysiology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effect of interleukin-2 (rIL-2) on nicotinic acetylcholine receptors (nAChR) was examined on cultured muscle fibres isolated from the flexor digitorum brevis muscle (FDB) of the rat and on aneural mouse cultured C2 myotubes. Intracellular measurement of the sensitivity to iontophoretically applied ACh demonstrated that the sensitivity of the extrajunctional nAChRs in cultured fibres showed a transient increase after application of rIL-2 (2,000–3,000 units/ml). Cell-attached patch-clamp experiments on the same fibres proved that rIL-2 (2,000 units/ml) induces a significant increase in the mean open time of the extrajunctional nAChR channel. The other channel parameters were not significantly modified. The same applied also to aneural mouse patch-clamped C2 myotubes exposed to rIL-2 (2,000 units/ml). In freshly dissociated fibres no effects on nAChR channels were observed following rIL-2 application. 125I-rIL-2 binding experiments on either 7-day cultured or freshly dissociated adult muscle fibres showed that a specific binding with a K d of 2.07±0.4 nM develops in cultured fibres but fails to occur immediately after dissociation. It is concluded that rIL-2 modulates the duration of extrajunctional nAChR channels in both myotubes and adult muscle cells, and that this effect is probably due to the activation of a second messenger system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00371120
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    Paper (German National Licenses)
    Fulltext
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