highly significantp < 0.0001
The analysis also quantified the influence of parameters on TPPs yield through standardized coefficients: liquid-to-solid ratio (X 3 ) and ultrasonic temperature (X 4 ) were highly significant ( p < 0.0001), followed by ultrasonic time (X 1 ) ( p = 0.005) and ultrasonic power (X 2 ) ( p = 0.0049).