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. 2022 Feb 25;12:3232. doi: 10.1038/s41598-022-07322-0

Figure 4.

Figure 4

Correlations between TPC, TFC, phenolic acid content, antioxidant activities and extraction parameters; (a) UAE with ethanol, (b) MAE with ethanol. Positive correlations are displayed in blue and negative correlations in red. Color intensity and the size of the circles are proportional to the correlation coefficients. Values of Spearman’s rank correlation coefficient above 0.6 are described as a strong correlation; t—extraction time, C—solvent concentration.