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. 2014 Mar 1;52(4):2336–2343. doi: 10.1007/s13197-014-1275-0

Fig. 2.

Fig. 2

Contour plots (2D) showing the effect of different extraction parameters (X1: ethanol concentration, %; X 2: extraction time, h; X3: extraction temperature, °C; X4: liquid–solid ratio, mL/g) added on the response Y