| he influence of selected prebiotics on the growth of lactic acid bacteria for bio-yoghurt production. | |
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MedLine Citation:
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PMID: 22230927 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Background. Prebiotics are a category of nutritional com-pounds grouped together, not necessarily by structural similarities, but by ability to promote the growth of spe-cific beneficial (probiotic) gut bacteria. Fructooligosaccharides (FOS) and inulin are among the most famous prebiotic compounds. In order to improve viability of probiotic bacteria during storage, fermented food should be supplemented with prebiotics. Material and methods. Yoghurts were produced from skimmed milk powder and prebiotics (FOS, inulin or resistant starch), which were added at concentrations of 1%, 2% and 3%. Yoghurts were stored in +4°C for three weeks. Every week each kind of fermented drink was examined in order to check the growth of lactic acid bacteria. Apparent viscosity and texture of bio-yoghurt were determinated during refrigerated storage. Results. The FOS and inulin addition to yoghurt caused an increase in the numbers of all bacteria in comparison to control yoghurt obtained without addition of prebiotics. The viable counts of Str. thermophilus, Lb. acidophilus and Bifidobacterium sp. when 1% of FOS was added to yoghurt were about 9 log cfu/g, 7.8 log cfu/g and 7.7 log cfu/g, respectively. In the presence of 1% of inulin, streptococci and bifidobacteria reached the growth at the level 8.8 log cfu/g and 7.5 respectively. Hardness and adhesiveness of yoghurt obtained with addition resistant starch increased systematically during 21 days of refrigerated storage. Conclusions. The numbers of lactic acid bacteria in obtained bio-yoghurts were sufficient in 97% of samples (106-109 cfu/g) according to FAO/WHO protocols. Generally, viability of bacteria was sufficient for 14 days and then their numbers decreased but usually not below 106 cfu/g. Prebiotics as FOS and inulin added to bio-yoghurt exhibited stimulatory effect on growth Lb. acidophilus and Bifidobacterium sp. Addition of prebiotics caused an increase in apparent viscosity and hardness (in case of FOS) and decrease in syneresis of obtained bio-yoghurts. |
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Authors:
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Waldemar Gustaw; Monika Kordowska-Wiater; Justyna Kozioł |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Acta Scientiarum Polonorum. Technologia Alimentaria Volume: 10 ISSN: 1644-0730 ISO Abbreviation: Acta Sci Pol Technol Aliment Publication Date: 2011 Oct |
Date Detail:
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Created Date: 2012-01-10 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101295615 Medline TA: Acta Sci Pol Technol Aliment Country: Poland |
Other Details:
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Languages: eng Pagination: 455-66 Citation Subset: IM |
Affiliation:
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University of Life Sciences in Lublin. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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