Abstract
The effect of l-arginine (Arg) on the thermal stability of whey protein-corn oil emulsions was investigated to determine its role in improving emulsion stability. The results indicated that with an increase in Arg concentration, the emulsion stability index, emulsification activity index, and absolute ζ-potential increased initially and decreased after high-temperature sterilization. However, the mean particle size, apparent viscosity, creaming indices, and dynamic interfacial pressure of the emulsions first decreased and then increased, and the performance of samples that only showed an increase in pH could also improve the emulsification stability. These results clarify the mechanism by which Arg increases the thermal stability of emulsions.
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