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Sökning: WFRF:(Edlund C) > Mittuniversitetet

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1.
  • Amenitsch, H, et al. (författare)
  • Bile salts form lyotropic liquid crystals
  • 2003
  • Ingår i: Colloids and Surfaces A: Physicochemical and Engineering Aspects. - 0927-7757 .- 1873-4359. ; 213:1, s. 79-92
  • Tidskriftsartikel (refereegranskat)abstract
    • A reinvestigation of the phase diagrams relative to some conjugated and non-conjugated bile salts in water has demonstrated the formation of lyotropic liquid crystalline phases, in contradiction with generally accepted statements. The phase behaviour is complex and the phase diagrams are unusual, compared to most surfactants and lipids. In particular, coexistence of liquid crystalline phases with crystals has been obser ed. The formation of liquid crystalline phases requires very long equilibration times and the thermal stability of the lyotropic phases is moderate. The observed structure is tentatively assumed to be of the reverse hexagonal type. Structural relations with currently accepted models for the organisation of bile salts into micelles and solid form have been found. (C) 2002 Elsevier Science B.V. All rights reserved.
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  • Edlund, Håkan, 1966-, et al. (författare)
  • Formation of a Liquid Crystalline Phase in the Sodium Taurodeoxycholate-Water System
  • 1998
  • Ingår i: Langmuir. - Washington DC : ACS Publications. - 0743-7463 .- 1520-5827. ; 14, s. 3691-3697
  • Tidskriftsartikel (refereegranskat)abstract
    • The binary phase equilibria for the system sodium taurodeoxycholate-water have been studied. The system forms a liquid crystalline phase in addition to the previously known isotropic solution phase at 22 °C. 2H (water) NMR quadrupole splitting, SAXS data in combination with the polarizing microscopic texture observed for the liquid crystal indicate that the liquid crystalline phase consists of a hexagonal-type aggregate structure. A metastable liquid crystal, probably with lamellar-type structure, also appears to exist prior to the formation of the stable hexagonal phase. A micellar growth is measured with the NMR self-diffusion method for the isotropic solution phase. Electrical conductance experiments are used to determine the liquid crystal-solution thermal transition.
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  • Resultat 1-6 av 6

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