Table 3. Ultrasound application in the extraction of components from animal-based food

Animal-based food type	Extracted compound	Type of ultrasound	Ultrasound specification	Processing condition	Highlights	Reference
Pork liver	Ferrochelatase	Low frequency-high power	- Frequency: 24 kHz- Power: 400 W	- Time: 1, 2.5, and- 5 min- Extraction T°: 4±2°C	- Extraction rate ↑- Enzymatic activity ↑ (33.3% increment in 1 min), zinc-protoporphyrin formation ↑	Abril et al. (2021)
Mechanically separated chicken meat	Meatresidue collagen	Low frequency-high power	- Frequency: 24 kHz- Power: 400 W	- Time: 0, 15, and- 30 min- Extraction T°: 4°C	- Collagen yield ↑ (by 40%)- Collagen integrity was not disturbed- Thermal stability of collagen ↑	Schmidt et al. (2021)
Chicken blood	Erythrocyte haemoglobin	Low frequency-high power	- Frequency: 20 kHz- Power: 600 W	- Extraction T°: 20°C	- Highly effective for lysing blood to extract hemoglobin	Garcia et al. (2015)