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  • Title: Effect of 1-butanol on the microstructure of lecithin/water/tripalmitin system.
    Author: Caboi F, Lazzari P, Pani L, Monduzzi M.
    Journal: Chem Phys Lipids; 2005 Jun; 135(2):147-56. PubMed ID: 15921975.
    Abstract:
    Warm microemulsions based on lipids characterized by a melting point over 50 degrees C have been successfully used as starting matrix in a quenching process to obtain solid lipid nanoparticles (SLN). In this work, we have investigated the effect of 1-butanol (B) on the phase behavior of the lecithin (LCT)/water (W)/tripalmitin (TP) system at 70 degrees C. The study has been carried out at LCT/B=1 (weight ratio). Emulsion and liquid crystalline phase regions have been observed in the ternary phase diagram, while the presence of 1-butanol in the LCT/W/B/TP system allows the formation of a wide area of liquid isotropic phase from the whole (LCT+B)/TP binary axis up to 37 wt% of water. The microstructure of this isotropic phase has been investigated by means of 1H NMR PGSE technique. The self-diffusion coefficients of the different components along oil and water dilution lines indicate a microstructural organization characterized by a highly connected water in oil domains.
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