title: Influence of water in the lamellar rearrangement of internal wool lipids.
abstract: Small angle X-ray scattering (SAXS) was applied to a new lipid model arrangement, which was achieved by concentrating or diluting internal wool lipid liposome suspensions in varying water concentrations. The influence of the water content in the lamellar structure of the internal wool lipids is compared with the lamellar structure of phosphatidylcholine bilayers present in the membranes of the living cells. The high increase in the lamellar distances with the water content indicates that large amounts of water can be retained in the lipid wool membrane in contrast to the case of phosphatidylcholine liposomes. A transition temperature between 40 and 50 degrees C tends to eliminate the ordered lamellar structure when more than 60% of water is present in the bilayer structure. This could account for the increase in the permeability of the wool fibres when these are soaked in water at temperatures exceeding 40 degrees C.
authors.affiliation: Instituto de Investigaciones Químicas y Ambientales de Barcelona (I.I.Q.A.B.), C.S.I.C., Jordi Girona 18-26, 08034 Barcelona, Spain. lcnesl@liqab.csic.es
authors.forename: Luisa
authors.initials: L
authors.lastname: Coderch
authors.forename: Sandra
authors.initials: S
authors.lastname: Méndez
authors.forename: Meritxell
authors.initials: M
authors.lastname: Martí
authors.forename: Ramon
authors.initials: R
authors.lastname: Pons
authors.forename: José Luis
authors.initials: JL
authors.lastname: Parra
mesh_terms: D000818:Animals; D008055:Lipids / Q000737:chemistry*; D008081:Liposomes; D053838:Scattering, Small Angle; D012756:Sheep; D014867:Water / Q000737:chemistry*; D014935:Wool / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D008055:Lipids; D008081:Liposomes; D014867:Water