Figure 1.

Unsupervised classification using principal component analysis on metabolomic data (phenolic compounds and organic acids) from the experimental wines produced by Vivace and Zymaflore X5 yeasts. The two circles highlight the two groups of wines, categorized by yeast strain. Letters of the samples in the Biplot indicate the ID: V—Vivace, Z—ZymafloreX5, F—French oak, A—American oak, C—control (no oak), 0—no resin, 0.5—0.5 g/L resin, 1—1 g/L resin, a; b; c—replication.