Fig. 2From: Exploring the correlation of metabolites changes and microbial succession in solid-state fermentation of Sichuan Sun-dried vinegarPhysicochemical characteristics of Cupei samples in different fermentation stages. Changes in the moisture (A, B), amino nitrogen (C, D), pH value and titratable acidity (E, F), total phenols and total flavonoids and pigment (G, H). Data were given as mean ± standard deviations. *P < 0.05; **P < 0.01; ***P < 0.001Back to article page