4.7 Article

Microencapsulation of Lactobacillus Acidophilus by Xanthan-Chitosan and Its Stability in Yoghurt

期刊

POLYMERS
卷 9, 期 12, 页码 -

出版社

MDPI
DOI: 10.3390/polym9120733

关键词

xanthan-chitosan; encapsulation; Lactobacillus acidophilus; RSM; storage stability

资金

  1. Scientific Research Program - Shaanxi Provincial Education Department [17JF005]
  2. Science and Technology Project of Xianyang city [2017K02-69]
  3. Shaanxi University of Science and Technology [2017BJ-04]
  4. Science and Technology Overall Planning for innovation Engineering project of Shaanxi Province [2016KTZDNY02-08]

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Microencapsulations of Lactobacillus acidophilus in xanthan-chitosan (XC) and xanthan-chitosan-xanthan (XCX) polyelectrolyte complex (PEC) gels were prepared in this study. The process of encapsulation was optimized with the aid of response surface methodology (RSM). The optimum condition was chitosan of 0.68%, xanthan of 0.76%, xanthan-L. acidophilus mixture (XLM)/chitosan of 1:2.56 corresponding to a high viable count (1.31 +/- 0.14) x 10(10) CFU.g(-1), and encapsulation yield 86 +/- 0.99%, respectively. Additionally, the application of a new encapsulation system (XC and XCX) in yoghurt achieved great success in bacterial survival during the storage of 21 d at 4 degrees C and 25 degrees C, respectively. Specially, pH and acidity in yogurt were significantly influenced by the new encapsulation system in comparison to free suspension during 21 d storage. Our study provided a potential encapsulation system for probiotic application in dairy product which paving a new way for functional food development.

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