Abstract
The interfacial adsorptivity of lysophosphatidylcholine (LPC) was investigated in relation to formation of stable emulsions and interaction of LPC on lipoproteins. The proportion of adsorbed LPC on the interface was measured by using the quantitative interaction between free LPC in an aqueous phase and multilamellar vesicle PC (MLV-PC) that was added after emulsification. Moreover, the effects of free fatty acid on the adsorptivity of LPC were measured by the decrease of LPC-fatty acid vesicles after emulsification. The line widths of 31P-NMR spectra broadened and mean diameters of droplets decreased with the increase of absorptivity. Thus, the restriction of headgroup motional freedom of LPC was correlated with the interaction between LPC and triacylglycerol or free fatty acid on the interface, and the adsorptivity and interaction varied with the fatty acid composition of oil phase and with the emulsifying temperature.
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