The pH range of the wines was generally 3.0–3.5, and the esterase activities showed an increasing trend, indicating that the two test strains had good pH adaptability.
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Studies on the pure fermentation and aroma contributions of <i>Torulaspora delbrueckii</i> killer yeasts with high enzymatic activity in different white wine varieties.
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The sentences
When the SO 2 content was in the range of 0–200 mg/L, the esterase activity showed a decreasing trend, indicating that the esterase activity was inhibited by SO 2 .