期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 66, 期 6, 页码 1479-1487出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.7b05279
关键词
fermented milk products; in situ quantitative monitoring; NMR
资金
- Japan Society for the Promotion of Science (JSPS) [23228003]
- Grants-in-Aid for Scientific Research [23228003] Funding Source: KAKEN
Fermented milk products are rising in popularity throughout the world as a result of their health benefits, including improving digestion, normalizing the function of the immune system, and aiding in weight management. This study applies an in situ quantitative nuclear magnetic resonance method to monitor chemical changes in three kinds of fermented milk products, Bulgarian yogurt, Caspian Sea yogurt, and kefir, during fermentation. As a result, the concentration changes in nine organic compounds, alpha/beta-lactose, alpha/beta-galactose, lactic acid, citrate, ethanol, lecithin, and creatine, were monitored in real time. This revealed three distinct metabolic processes in the three fermented milk products. Moreover, pH changes were also determined by variations in the chemical shift of citric acid during the fermentation processes. These results can be applied to estimate microbial metabolism in various flora and help guide the fermentation and storage of various fermented milk products to improve their quality, which may directly influence human health.
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