Abstract:
:In this work, the protective capacity of galacto-oligosaccharides in the preservation of Lactobacillus delbrueckii subsp. bulgaricus CIDCA 333 was evaluated. Lactobacillus bulgaricus was freeze-dried or dried over silica gel in the presence of three commercial products containing galacto-oligosaccharides. The freeze-dried samples were stored at 5 and 25°C for different periods of time. After desiccation, freeze-drying or storage, samples were rehydrated and bacterial plate counts were determined. According to the results obtained, all galacto-oligosaccharides assays demonstrated to be highly efficient in the preservation of L. bulgaricus. The higher content of galacto-oligosaccharides in the commercial products was correlated with their higher protective capacity. Galacto-oligosaccharides are widely known by their prebiotic properties. However, their role as protective molecules have not been reported nor properly explored up to now. In this work the protective capacity of galacto-oligosaccharides in the preservation of L. bulgaricus, a strain particularly sensitive to any preservation process, was demonstrated. The novel role of galacto-oligosaccharides as protective molecules opens up several perspectives in regard to their applications. The supplementation of probiotics with galacto-oligosaccharides allows the production of self-protected synbiotic products, galacto-oligosaccharides exerting both a prebiotic and protecting effect.
journal_name
Cryobiologyjournal_title
Cryobiologyauthors
Tymczyszyn EE,Gerbino E,Illanes A,Gómez-Zavaglia Adoi
10.1016/j.cryobiol.2011.01.013subject
Has Abstractpub_date
2011-04-01 00:00:00pages
123-9issue
2eissn
0011-2240issn
1090-2392pii
S0011-2240(11)00014-9journal_volume
62pub_type
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