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  • 1990-1994  (2)
  • 1970-1974
  • 68.55.Ce  (1)
  • Cl− channel  (1)
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  • 1990-1994  (2)
  • 1970-1974
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Characterization of an outwardly rectifying chloride channel in a human submandibular gland duct cell line (HSG) (1994)
    Springer
    Pflügers Archiv 427 (1994), S. 203-209 
    Details
    ISSN: 1432-2013
    Keywords: Cl− channel ; Human submandibular gland ; Duct cell line ; Patch clamp
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We have used the single-channel patch-clamp technique to study ion channels in the plasma membrane of the HSG human submandibular gland duct cell line. In cell-attached and excised inside-out patches, at least six channel types were observed. When the pipette contained an isotonic KCl-rich solution and the bath an isotonic NaCl-rich solution, the predominant channel type seen in excised inside-out patches was a Cl− channel with an outwardly rectifying current/voltage (I/V) relation that had a conductance of 12 pS at positive pipette potentials and 43 pS at negative pipette potentials. The channel was only seen in excised patches and its open probability was not significantly increased by membrane depolarization. The channel selectivity sequence (relative to Cl−) was estimated from reversal potential measurements to be: SCN− (1.8)〉NO 3 − (1.4)〉 I− (1.1) ∼ Cl− (1) ∼ Br− (0.8) 〉 acetate (0.35). In inside-out patches the channel was blocked by addition of 5-nitro-2-(3-phenylpropylamino)-benzoate (NPPB) (100 μmol/l) to the bath but not by 9-anthracene carboxylic acid (9-AC) (100 μmol/l). The channel was not activated by increases in the free Ca2+ concentration on the cytosolic surface. This is the first report of an outwardly rectifying Cl− channel in a salivary epithelium. The properties of this channel are not in accordance with the properties of the Cl− conductances in the acinar or duct tissues which have been studied so far and its physiological role is unclear.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00374525
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Structure and optical properties of CdSe quantum dots embedded in CaF2 vacuum-deposited films (1993)
    Springer
    The European physical journal 26 (1993), S. 225-227 
    Details
    ISSN: 1434-6079
    Keywords: 68.55.Ce ; 75.60.Jp ; 61.16.Di ; 42.65-K
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract CdSe nano-crystallites as quantum dots are prepared in CaF2 films by a simultaneous vacuumdeposition technique. The crystallites have a ZnS-type structure and a parallel epitaxial orientation in the CaF2 films, the size being 2–5 nm. Annealed samples realize CdSe quantum dots of 5 nm in size, the lattice being shrunk by 3 % due to the embedding effect. The CdSe-CaF2 composite film is a new type of sample of semiconductor quantum dots embedded in insulators, different from previous ones embedded in glass. The non-linear optical properties are measured in relation to the atomic structures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01425672
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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