Fig. 4From: Green ultrasound-assisted extraction of fish oil from rainbow trout intestines and purification with adsorbentsA Appearance of the oils after extraction, with the addition of antioxidants and subsequent purification, and B impact of antioxidant addition and purification on the peroxide value (POV) in the oils. The asterisks indicate significant differences in values (p < 0.05) when antioxidants are added to the oilBack to article page