Fig. 5 | Scientific Reports

Fig. 5

From: Bioactive constituents of amphibious Rotala rotundifolia at different growth stages and response surface optimization for flavonoid extraction

Fig. 5

Three-dimensional (3D) response surface plots: effects of extraction time (X1) and extraction power (X2) (a), extraction time (X1) and ethanol concentration (X3) (b), extraction time (X1) and solid–liquid ratio (X4) (c), extraction power (X2) and ethanol concentration (X3) (d), extraction power (X2) and solid–liquid ratio (X4) (e), and ethanol concentration (X3) and solid–liquid ratio (X4) (f).

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