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Table 2

Experimental and calculated responses of the centred composite plan of the organosolv pre-treatment of sawdust from Ayous.

Real variables
 Pentose (mg/mL)
 RS (mg/mL)
 PC (μg/mL)
X 1 X 2 X 3 Y ExpP Y CalP Y ExpRS Y CalRS Y ExpPC Y CalPC
1 190 35 50 3.750 2.925 0.094 2.049 20.177 21.106
2 190 35 50 2.700 2.925 0.067 2.049 19.592 21.106
3 190 35 50 2.938 2.925 0.073 2.049 24.788 21.106
4 190 35 50 3.869 2.925 0.097 2.049 19.584 21.106
5 190 20 30 4.450 3.747 0.111 1.029 8,329 0
6 210 20 30 5.080 5.024 0.127 1.662 14.982 18.898
7 170 50 30 2.045 2.007 0.051 2.150 42.206 46.503
8 210 50 30 4.641 4.337 0.116 2.960 67.032 63.277
9 170 20 70 2.356 3.881 0.059 2.109 2.175 6.068
10 210 20 70 2.942 2.902 0.074 2.124 46.151 41.992
11 170 50 70 3.642 3.219 0.091 2.449 71.651 67.873
12 210 50 70 2.668 3.293 0.067 2.640 87.493 98.817
13 218.2 35 50 3.407 3.214 0.085 1.992 52.791 47.652
14 161.8 35 50 1.911 2.261 0.048 1.411 5.639 10.500
15 161.8 56.15 50 2.173 1.955 0.054 3.475 92.250 86.571
16 190 13.85 50 2.232 2.906 0.056 2.321 6.309 11.710
17 190 35 78.2 5.122 4.531 0.128 1.997 48.557 43.450
18 190 35 21.8 4.424 5.172 0.111 1.461 7.275 12.103

X1 = temperature; X2 = time; X3 = ratio ethanol–water; Yexp = experimental response; Ycal = calculated response RS = Reducing Sugars; PC = Phenolic Compounds.

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