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2000 (1)
1984 (1)
1Author    R. Elsebrock, M. StockhausenRequires cookie*
 Title    Dielectric Spectroscopy of Solutions of Some Alkylammonium Salts in Chloroform and 1-Octanol  
 Abstract    Dielectric loss spectra between 1 MHz and 36 GHz have been measured at 20°C for solutions of hexadecyl trimethylammonium bromide and chloride, tetrahexylammonium bromide and tetrabutylam-monium bromide in chloroform and 1-octanol (three solutes per solvent) at moderate and high concen-trations. The discussion is aimed at identifying relaxation processes involving ions. Describing the relax -ational part of the spectra (after subtraction of the conductivity contribution) by a sum of spectral com-ponents, the lowest frequency component can be attributed to the solute in all cases. Its concentration dependence is indicative of two ionic relaxation processes differing in physical nature. The solvent is partly involved in those processes; moreover a structure breaking effect is likely to occur in case of the alcoholic solvent. The results are also discussed in comparison with a molten alkylammonium salt and with solutions of this and of inorganic salts. 
  Reference    Z. Naturforsch. 55a, 629—636 (2000); received April 13 2000 
  Published    2000 
  Keywords    Dielectric Relaxation, Electrolyte Solutions, Ionic Aggregation 
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 TEI-XML for    default:Reihe_A/55/ZNA-2000-55a-0629.pdf 
 Identifier    ZNA-2000-55a-0629 
 Volume    55 
2Author    C. Ballario, A. Bonincontro, C. Cametti, A. Rosi, L. SportelliRequires cookie*
 Title    Effect of Extracellular Alkali Metal Salts on the Electric Parameters of Human Erythrocytes in Normal and Pathological Conditions (Homozygous ^-Thalassemia)  
 Abstract    The conductivity of human erythrocyte cells dispersed in various uni-univalent electrolyte solutions (NaCl, KC1, LiCl, CsCl; 0.15 m) have been measured in the frequency range from 10 KHz to 100 MHz at five temperatures between 5 and 45 °C. The results were analyzed in the light of the theory of conductivity polarization of a suspension of ellipsoidal particles covered with two confocal shells. Differences in the electrical parameters of the membrane between normal and homozygous /?-thalassemic cells have been evidentiated. 
  Reference    Z. Naturforsch. 39c, 1163—1169 (1984); received April 24/September 10 1984 
  Published    1984 
  Keywords    Conductivity, Radiowave Frequencies, Electrolyte Solutions, Erythrocytes, Homozygous /?-Thalassemic Erythrocytes 
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 TEI-XML for    default:Reihe_C/39/ZNC-1984-39c-1163.pdf 
 Identifier    ZNC-1984-39c-1163 
 Volume    39