Effect of Ultrasonic-Assisted Enzymatic Hydrolysis on Functional Properties and Antioxidant Activity of Eri Silkworm Pupa Protein Isolate

Table 2

Functional properties of untreated and treated protein isolate.

Treatment	Water-holding capacity (gwater/gsample)	Oil-holding capacity (goil/gsample)	Emulsion capacity (%)	Emulsion stability (%)	Foam capacity (%)	Foam stability (%)
EPI	a	b	c	b	c	b
EPIU20	a	a	a	a	b	a
EPIH95	b	c	b	a	a	d
EPIU20-H30	b	c	b	a	a	c

Values in the same column having the same letter for each parameter are not significantly different at a confidence level of 95%. EPI: control/protein isolate; EPIU20: 20-minute ultrasound protein isolate; EPIH95: acid-digested protein isolate for 95 minutes; EPIU20-H30: the protein isolate was treated by ultrasound for 20 minutes and acid-digested for 30 minutes.