UP	Ultrasound pretreatment
US	Ultrasound simultaneous treatment
CCHs	Chinemys reevesii skin collagen hydrolysates
CE	Conventional enzymatic treatment
UPH	Ultrasound pretreatment-assisted enzymatic hydrolysis
WUH	Whole-process ultrasound-assisted hydrolysates
TSE	Transmissible spongiform encephalopathy
FMD	Foot-and-mouth disease
AI	Avian influenza
ABTS	2,2-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid)
DPPH	1,1-diphenyl-2-picrylhydrazyl