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PCA and cluster analysis of the antioxidant potential of malt samples: (a) PCA loading plot of two principal components PC1 and PC2, (b) score plot presenting analyzed samples in terms of PC1 vs. PC2, (c) cluster analysis. Blue lines at (a) indicate active data included in the PCA analysis. The blue line on (b) concerns the separation of a group of data with a similar effect to the examined indicators. Explanations: sample and indicator codes as in Table 1.
