Polysaccharides of Scrophularia ningpoensis Hemsl.: Extraction, Antioxidant, and Anti-Inflammatory Evaluation

Table 1

Coded and uncoded levels of independent variables used for BBD.

Independent variable	Coded levels
	−1	0	1
Ultrasonic temperature (X1) (°C)	30	50	70
Ultrasonic power (X2) (W)	285	475	665
Ultrasonic time (X3) (min)	15	25	35