Effects of Ultrasonic-Microwave-Assisted Technology on Hordein Extraction from Barley and Optimization of Process Parameters Using Response Surface Methodology

Table 1

Independent variables and their levels used for the CCD.

Variables	Symbols	Level
		−2	−1	0	1	2
Temperature (°C)		45	55	65	75	85
Microwave power (W)		185	220	255	290	325
Ultrasonic power (W)		560	600	640	680	720
Extraction time (min)		12	15	18	21	24