. 2012 Mar 9;17(3):3008–3024. doi: 10.3390/molecules17033008

Table 2.

Coded and real variables of a central composite design for two factors and experimental and calculated values of the objective functions during operation with Diaion HP20.

	Coded Variables		Real Variables		Objective Functions
Exp.	T	E	T (°C)	EtOH (%)	Y_1exp	Y_1calc	Y_2exp	Y_2calc	Y_3exp	Y_3calc	Y_4exp	Y_4calc	Y_5exp	Y_5calc
1	−1	−1	25	48	62.0	59.6	20.9	21.3	0.444	0.439	0.242	0.255	11.4	11.1
2	1	−1	45	48	63.2	62.2	21.6	22.1	0.475	0.467	0.263	0.270	8.90	9.60
3	−1.4142	0	20.858	68	62.2	64.2	22.3	22.3	0.475	0.479	0.276	0.269	10.3	11.2
4	1.4142	0	49.142	68	63.8	63.8	23.5	23.3	0.469	0.476	0.279	0.281	11.3	10.8
5	0	−1.4142	35	40	56.7	58.7	21.6	20.9	0.434	0.441	0.268	0.255	10.7	10.3
6	0	1.4142	35	96	63. 6	63.6	21.7	22.1	0.497	0.500	0.275	0.281	12.4	13.1
7	−1	1	25	88	66.9	65.9	22.4	22.2	0.514	0.511	0.279	0.279	13.0	11.9
8	1	1	45	88	62.3	62.7	23.0	22.8	0.483	0.478	0.289	0.282	12.8	12.8
9	0	0	35	68	64.1	64.5	21.8	22.2	0.475	0.469	0.262	0.261	10.9	11.1
10	0	0	35	68	64.5	64.5	22.2	22.2	0.474	0.469	0.264	0.261	11.6	11.1
11	0	0	35	68	64.5	64.5	22.6	22.2	0.457	0.469	0.260	0.261	11.1	11.1
12	0	0	35	68	64.6	64.5	22.2	22.2	0.460	0.469	0.256	0.261	10.9	11.1
13	0	0	35	68	64.6	64.5	22.1	22.2	0.479	0.469	0.265	0.261	11.0	11.1

Y₁: Phenolic desorption yield (%); Y₂: Sugars desorption yield (%); Y₃: Total phenolic content (g GAE/g extract); Y₄: Total sugar content (g D-glucose/g extract); Y₅: Radical scavenging activity (mM Trolox).