Response 3D surface plot of the four variables to the interaction of AMRP yield. A: the interaction between liquid-to-solid ratio and ultrasonic power, B: the interaction between liquid-to-solid ratio and extraction time, C: the interaction between liquid-to-solid ratio and extraction temperature, D: the interaction between extraction time and ultrasonic power, E: the interaction between extraction temperature and ultrasonic power, F: the interaction between extraction time and extraction temperature.