Fig. 4: Microlevel analysis of composite protein nanoparticle formation.

Particle size potential (A) and transmission electron microscopy (B–H) of the solution formed by composite nanoparticles. All the values are expressed as mean ± SD. Mean values with different letters are significantly different (p < 0.05). SW1: Ultrasonic (0 W)—laccase-modified SPI cross-linked WPI; SW2: Ultrasonic (150 W)—laccase-modified SPI cross-linked WPI; SW3: Ultrasonic (300 W)—laccase-modified SPI cross-linked WPI; SW4: Ultrasonic (450 W)—laccase-modified SPI cross-linked WPI; SW5: Ultrasonic (600 W)—laccase-modified SPI cross-linked WPI. SPI soy protein isolate, WPI whey protein.