Valorization of Glycine max (Soybean) Seed Waste: Optimization of the Microwave-Assisted Extraction (MAE) and Characterization of Polyphenols from Soybean Meal Using Response Surface Methodology (RSM)

Table 1

Screening plan.

Variable	Experiments	1	2	3
Power	Power (W)	120	180	240
	Time (min)	5	5	5
	Ethanol percentage (%)	20	20	20
	Solvent/dry matter ratio (ml/g)	30/1	30/1	30/1
Time	Power (W)	240	240	240
	Time (min)	2	4	6
	Ethanol percentage (%)	20	20	20
	Solvent/dry matter ratio (ml/g)	30/1	30/1	30/1
Ethanol percentage	Power (W)	240	240	240
	Time (min)	5	5	5
	Ethanol percentage (%)	20	50	80
	Solvent/dry matter ratio (ml/g)	30/1	30/1	30/1
Solvent/dry matter ratio	Power (W)	240	240	240
	Time (min)	5	5	5
	Ethanol percentage (%)	20	20	20
	Solvent/dry matter ratio (ml/g)	20/1	30/1	40/1