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(A) Saliva Precipitation Index (SPI, g/L of gallic acid equivalent, GAE), (B) subqualities of wines at the end of the experiment. Different letters indicate a statistically significant difference in SPI before and after the oxidation oxygen treatment (A, B), while for a different stage of oxygen saturations (a, b, c) differences among subqualities of wines at the end experiment are denoted with an asterisk (p < 0.05).
