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Food Science and Technology

versão impressa ISSN 0101-2061versão On-line ISSN 1678-457X

Resumo

MONTANUCI, Flávia Daiana; PIMENTEL, Tatiana Colombo; GARCIA, Sandra  e  PRUDENCIO, Sandra Helena. Effect of starter culture and inulin addition on microbial viability, texture, and chemical characteristics of whole or skim milk Kefir. Ciênc. Tecnol. Aliment. [online]. 2012, vol.32, n.4, pp.580-865.  Epub 13-Nov-2012. ISSN 0101-2061.  https://doi.org/10.1590/S0101-20612012005000119.

The effect of inulin addition and starters (Kefir grains or commercial starter culture) on the microbial viability, texture, and chemical characteristics of Kefir beverages prepared with whole or skim milk was evaluated during refrigerated storage. The type of starter did not influence microbial viability during the storage of the beverages, but the chemical and textural changes (decreases in pH, lactose concentration, and inulin and increased acidity, firmness, and syneresis) were more pronounced in the formulations fermented with grains than those fermented with the starter culture. The addition of inulin did not influence acidity or viability of lactic acid bacteria, but in general, its effect on the survival of acetic acid bacteria, Lactococcus and yeasts, firmness, and syneresis depended on the type of milk and starter culture used. Generally, the yeast, acetic acid bacteria, and Leuconostoc counts increased or remained unchanged, while the total population of lactic acid bacteria and Lactococcus were either reduced by 1 to 2 logs or remained unchanged during storage.

Palavras-chave : fermented milk; fat replacer; storage stability.

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