Figure 3.
Three-dimensional contour plots showing the experimental factors and their mutual interactions: (A) effect of ultrasound-assisted extraction (UAE) power and EtOH% on the yield of flavonoids; (B) effect of UAE power and the amount of cellulase on the yield of flavonoids, and (C) effect of EtOH% and the amount of cellulase on the yield of flavonoids. Two-dimensional contour plots showing the experimental factors and their mutual interactions: (a) effect of ultrasound-assisted extraction (UAE) power and EtOH% on the yield of flavonoids; (b) effect of UAE power and the amount of cellulase on the yield of flavonoids, and (c) effect of EtOH% and the amount of cellulase on the yield of flavonoids.

