Thermodynamic and structural aspects of internal wool lipids

Jordi Fonollosa, Meritxell Martí, Alfons De La Maza, Manel Sabés, José Luis Parra, Luisa Coderch

Research output: Contribution to journalArticleResearchpeer-review

16 Citations (Scopus)


Thermotropic physicochemical techniques such as differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), and electron paramagnetic resonance (EPR) were applied to liposomes made up of internal wool lipids. These vesicles can be regarded as a model of wool membranes. Differences in fluidity obtained from EPR allow us to deduce a high rigidity of the polar external section of the vesicle in contrast to the high fluidity of the hydrophobic internal section, which accounts for the thermotropic properties of the liposome. The coincidence of the thermotropic changes obtained with the EPR, FTIR and DSC techniques allows us to infer a reversible phase transition temperature in the range of 30-40°C, indicating a transition from a mixture of hexagonal gel-liquid crystal state to a single liquid crystal state.
Original languageEnglish
Pages (from-to)4808-4812
Issue number11
Publication statusPublished - 30 May 2000


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