Fig. 6
From: NMR-based metabolomics in wine quality control and authentication
Principal component analysis (PCA) score plot (PC1 vs PC2) of spectral data obtained from 1H NMR spectra of wines produced with autochthonous (A; closed triangles) or commercial (C; open circles) yeast starter. The explained variance (%) is reported for each principal component, and dotted ellipses represent the 95% confidence limits for each wine type. Reprinted with permission from Ref. [43]. Copyright (2013) American Chemical Society