Extraction Optimization, Preliminary Identification, and Bioactivities in Corn Silk

Table 1

The factors and levels of the single-factor experiment of the flavonoid extraction process.

Variables	Levels
Ultrasonic power (W)	300, 350, 400, 450, 500
Ultrasonic time (min)	10, 20, 30, 40, 50
Ultrasonic temperature (°C)	40, 50, 60, 70, 80
Liquid-solid ratio (mL/g)	10, 15, 20, 25, 30
Ethanol concentration (%)	40, 50, 60, 70, 80