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(a) Coefficient of friction as a function of entrainment speed for sunflower oil, buffer with α-amylase and OSA starch stabilized emulsion in absence or presence of buffer and/or α-amylase subjected to a normal load of 2 N and at 37 °C; (b) Particle size distribution of the OSA starch stabilized-emulsion (40 wt % oil) with and without α-amylase before and after being subjected to tribological shear.
