In order to modify their state of aggregation, the seric protein solutions (pH = 7) at different concentrations (3, 5 and 15 g/L) and different ionic forces (3 and 100 mM) have been treated in an APV plate heat exchanger at 80, 100 and 120 °C, after that in a high pressure homogenizer at 1000, 2000 and 3000 bars. The dimensional range of the obtained aggregates has been characterized through laser granulometry and light dynamic diffusion. In order to establish the modification of functional properties of the seric protein solutions, emulsions and foams have been prepared starting from these solutions treated as mentioned before. The results showed that the thermomechanical treatments that have been used allowed the formation of aggregates whose dimensions where more important than the increase in the ionic strength of the solution. The properties of the emulsions obtained with treated protein solutions are similar, whatever the starting concentration or type of applied treatment was. The treated protein solutions exhibited an improved foaming capacity.
