Microbiological and chemical properties of kefir manufactured by entrapped microorganisms isolated from kefir grains
Open accessAbstract
In this study, various yeasts (Kluyveromyces marxianus, Saccharomyces turicensis, Pichia fermentans) and lactic acid bacteria (Lactobacillus kefiranofaciens, Lactobacillus kefiri, Leuconostoc mesenteroides) were entrapped in 2 different microspheres using an entrapment ratio for the strains that was based on the distribution ratio of these organisms in kefir grains. The purpose of this study was to develop a new technique to produce kefir using immobilized starter cultures isolated from kefir grains. An increase in cell counts with fermentation cycles was observed for both the lactic acid bacteria (LAB) and yeasts, whereas the cell counts of kefir grains were very stable during cultivation. Scanning electron microscopy showed that the short-chain lactobacilli and lactococci occupied the surface of the LAB microspheres, whereas the long-chain lactobacilli were inside the microspheres. When the yeasts were analyzed, cells at a high density were entrapped in cracks on the surface and within the microspheres, where they were surrounded by the short-chain lactobacilli. The distribution of the LAB and yeast species in kefir produced from grains and microspheres showed that there was no significant difference between the kefirs produced by the 2 methods; moreover, Leu. mesenteroides and K. marxianus were the predominating microflora in both types of kefir. There was no significant difference in the ethanol and exopolysaccharide contents between the 2 kefirs, although the acidity was different.
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- Authors
- Chen, T.-H., Wang, S.-Y., Chen, K.-N., Liu, J.-R., & Chen, M.-J.
- Affiliations
- National Taiwan University (TW)
- Tungnan University (TW)
- Corresponding author
- Chen, M.-J.
- Venue
- Journal of Dairy Science
- Publisher
- American Dairy Science Association
- Published
- 2009-07
- Volume
- 92
- Issue
- 7
- Pages
- 3002-3013
- ISSN
- 0022-0302 (ISSN-L)
- OpenAlex
- W1973532079
- Cited by
- 62
- References
- 52
- Citations by year
- 2026: 2 · 2025: 3 · 2024: 2 · 2023: 4 · 2022: 4 · 2021: 10 · 2020: 7 · 2019: 2 · 2018: 1 · 2017: 4 · 2016: 2 · 2015: 2 · 2014: 2 · 2013: 4 · 2012: 6
- FWCI
- 6.33
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Journal of Dairy Science (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Ministry of Science and Technology, Taiwan
- Topics
- Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
- Life Sciences › Agricultural and Biological Sciences › Food Science › Advanced Scientific Research Methods
- Life Sciences › Agricultural and Biological Sciences › Food Science › Fermentation and Sensory Analysis
- Keywords
- kefir, kefir grains, microspheres, lactic acid bacteria, yeast, Kluyveromyces marxianus, Pichia fermentans, Lactobacillus kefiranofaciens, Lactobacillus kefiri, Leuconostoc mesenteroides, kefiran, ethanol, acidity
- MeSH terms
- Alginates, Fermentation, Food Handling, Food Technology, Gram-Positive Bacteria, Hexuronic Acids, Lactobacillus, Leuconostoc, Microscopy, Electron, Scanning, Microspheres, Yeasts, Glucuronic Acid, Cultured Milk Products
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