Figure 1.
Effects of extraction time (A); extraction temperature (B); liquid-to-solid ratio; (C) and number of extractions (D) on the extraction yield of RGP. Each value is presented as mean ± S.D. (n= 3); Response surface (3D) showing the effects of extraction temperature and liquid-to-solid ratio at a fixed extraction time of 60 min (E); extraction time and liquid-to-solid ratio at a fixed extraction temperature 65 °C (F); extraction time and extraction temperature at a fixed liquid-to-solid ratio of 45 mL/g on extraction yield of RGP (G).
