Research Article

Systematic and Empirical Study of the Dependence of Polyphenol Recovery from Apricot Pomace on Temperature and Solvent Concentration Levels

Figure 7

Polyphenols (a), flavonoids content (b), tannins content (c), and antiradical activity (d) surface plots. The three-dimensional graphs were plotted between two independent variables (temperature and ethanol concentration).
(a) Estimated response surface
(b) Estimated response surface
(c) Estimated response surface
(d) Estimated response surface