Membrane Self Assembly in Mixed DMPC/NaC Systems by SANS (Articolo in rivista)

Type
Label
  • Membrane Self Assembly in Mixed DMPC/NaC Systems by SANS (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Kiselev M.A. (1), D. Lombardo(2), P. Lesieur(3), A. M. Kisselev(4), S. Borbely(5), T. N. Simonova(6), L.I. Barsukov(6) (2007)
    Membrane Self Assembly in Mixed DMPC/NaC Systems by SANS
    in Chemical physics (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Kiselev M.A. (1), D. Lombardo(2), P. Lesieur(3), A. M. Kisselev(4), S. Borbely(5), T. N. Simonova(6), L.I. Barsukov(6) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • XXX (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (1)FLNP, Joint Institute for Nuclear Research, Dubna 141980, Russia. (2)CNR-IPCF, Istituto per i Processi Chimico Fisici (Sez. Messina), Messina I-98123, Italy. (3)LURE, Université Paris-sud, F-91405 Orsay, France (4)Department of Materials Science and Engineering, Pennsylvania State University, USA. (5)Research Institute for Solid State Physics, Budapest, Hungary. (6)Institute of Bioorganic Chemistry, Moscow, Russia (literal)
Titolo
  • Membrane Self Assembly in Mixed DMPC/NaC Systems by SANS (literal)
Abstract
  • Morphological transition in a mixed system of the dimyristoylphosphatidylcholine (DMPC)/sodium cholate (NaC) has been investigated by small-angle scattering of neutron (SANS) and X-ray (SAXS). Structural investigation, performed as a function of temperature and NaC concentration, show that the system containing 15 mM DMPC and 6 mM NaC reveals a strong dependence of SANS spectra on the temperature. The morphological transformations has been interpreted as a micelle-to-vesicle transition which is induced by the temperature variation (TI-MVT). The main features of the obtained results show that the temperature effect are far less profound in the system containing 2 or 12 mM NaC and can be assigned to small morfological changes within the same population of particles (vesicular or micellar, respectively). The main features of the structural analysis suggest that structural transformations at the TI-MVT proceed in the following sequence: globular micelles – rod-like micelles – polymer-like micelles – unilamellar vesicles. More specifically the globular and rod like micelles present an ellipsoidal cross-section rather than circular one, the former being geometrically more favourable for accommodation of bilayer- forming molecules like DMPC into the micellar structures. (literal)
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