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. 2019 Feb 14;24(4):686. doi: 10.3390/molecules24040686

Figure 4.

Figure 4

2D graphical response of the effects of the independent variables on the extraction of anthocyanin compounds from red rubin basil leaves (see Figure 1 for peak identification). Dots (ʘ) represent the optimal values. In each plot, each independent variable was positioned at the optimal value of the other two variables (Table 3).