Production for High-vitality Starter Culture of <i>Lactobacillus plantarum</i> NDC 75017 by High Cell-density Cultivation and Low-temperature Vacuum Drying

  • Hou Baochao
    Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University Bioengineering Institute, Wahaha R&D Center, Hangzhou Wahaha Group CO., LTD
  • Wang Hui
    Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University
  • Yan Tianwen
    Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University
  • Shan Yi
    National Research Center of Dairy Engineering and Technology
  • Zhou Wenqi
    Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University
  • Zhang Lidong
    Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University
  • Man Chaoxin
    National Research Center of Dairy Engineering and Technology Synergetic Innovation Center of Food Safety and Nutrition
  • Deng Yu
    Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University
  • Jiang Yujun
    Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University National Research Center of Dairy Engineering and Technology Synergetic Innovation Center of Food Safety and Nutrition

抄録

<p>With the predominance of producing γ-aminobutyric acid (GABA) in milk fermentation as basis, the objective of this study was to investigate the production of high-vitality starter cultures by Lactobacillus plantarum NDC 75017. The strain, isolated from traditional yogurt in Inner Mongolia of China, can produce γ-aminobutyric acid-enriched fermented milk and possesses beneficial properties. In this study, the strain was grown in optimized mMRS media in 3.7 L fully instrumented fermenter to produce biomass. Cells grown in the stationary phase were harvested and freeze dried. The viable cell count was up to 2.22 × 1011 CFU g−1 of freeze-dried product upon the addition of 8% w/v trehalose, 4% w/v maltodextrin, 4% w/v L-glutamate sodium salt, and 10% w/v skim milk as cryoprotectants. These freeze dried cells were stored at temperatures of 25°C and 4°C and periodically checked for viability and preparation of fermented milk, which showed a higher cell viability and stability after stored at 4µC in 210 days. Based on our result, the high-viability starter cultures could be easily and economically produced.</p>

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