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  • Title: Fermentation parameters, antioxidant capacities, and volatile flavor compounds of tomato juice-skim milk mixtures fermented by Lactobacillus plantarum ST-III.
    Author: Wang K, Ma C, Gong G, Chang C.
    Journal: Food Sci Biotechnol; 2019 Aug; 28(4):1147-1154. PubMed ID: 31275714.
    Abstract:
    This study evaluated the influence of tomato juice enriched with the probiotic strain Lactobacillus plantarum ST-III on the flavor and health-promoting effects of fermented skim milk. Fermentation parameters, such as titratable acidity, viable cell counts, antioxidant activity, and volatile components, were examined. The viable bacterial cell counts of 40% tomato juice samples were significantly higher than those in the control group, peaking at 1.09 × 109 CFU/mL after 48 h, and the titratable acidity was increased by 2.76-fold versus the control value. The antioxidant ability of fermented milk was correlated with the tomato juice content in addition to fermentation time in the 2,2-diphenyl-1-picrylhydrazyl and ferric reducing/antioxidant power assays; for these methods, the scavenging activities of 40% samples were 1.18- and 1.28-fold higher than the control values, respectively, at 24 h. Moreover, abundant flavor components, especially aldehydes, were detected after the addition of L. plantarum ST-III-supplemented tomato juice.
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