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  • Articles  (2)
  • Alamethicin pore  (1)
  • Alginate  (1)
  • Springer  (2)
  • De Gruyter
  • 1980-1984  (2)
  • 1925-1929
Collection
  • Articles  (2)
Publisher
  • Springer  (2)
  • De Gruyter
Years
  • 1980-1984  (2)
  • 1925-1929
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European biophysics journal 9 (1983), S. 181-191 
    ISSN: 1432-1017
    Keywords: Alamethicin pore ; Voltage-dependent conductance ; α-helical structure ; Dipole moment ; Lipid bilayers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract The voltage-dependency of alamethicin pore formation is explained by a flip-flop gating mechanism of single alamethicin molecules. The energetically preferred aggregate structure is changed from antiparallel to parallel molecule orientation by membrane voltage application. The electrical field is sensed by the permanent dipole of the α-helical molecule part which spans the hydrophobic membrane core. Ion conducting pore and pore states result from electrostatic repulsion of a varying number of parallel dipoles which arrange circularly. This model is consistent with published data and with two additional experimental facts, that pore state distributions are ionic strength dependent and pore state conductances depend on ionic current direction.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Plant and soil 65 (1982), S. 219-231 
    ISSN: 1573-5036
    Keywords: Alginate ; Carob gum ; France ; Inoculant ; Nodulation ; Polyacrylamide ; Polymer ; Rhizobium japonicum ; Senegal ; Soja ; Xanthan
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Field and cylinder experiments conducted in France and in Senegal showed that polyacrylamide, previously proposed as an entrapping gel for preparing Rhizobium inoculants, could be replaced by alginate (AER inoculant) or a mixture of xanthan and carob gum (XER inoculant). Semi-dried or dried AER and XER were used successfully provided that their storage time was less than 90 days. In soil inoculation trails, no marked differences were observed among semi-dried XER, dried AER, and dried XER. A number of seed inoculation experiments indicated that dried XER significantly outranked AER. Seeds preinoculated by up to 48 days with XER yielded plants which were comparable in nodulation and growth parameters to those derived from plant receiving peat inoculation at the time of planting.
    Type of Medium: Electronic Resource
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