INFLUENCE DE LA MATIERE SECHE DANS LE LAIT SUR LA CROISSANCE ET L’ACTIVITE FERMENTATIVE DES BIFIDOBACTERIES
BARASCU E. UNIVERSITÉ VALAHIA TARGOVISTE, FACULTÉ D’INGÉNIERIE D’ENVIRONNEMENT ET BIOTECHNOLOGIES, CATHÈDRE DE LA TECHNOLOGIE DES PRODUITS ALIMENTAIRES, 18-24 RUE UNIRII, E-MAIL: ELBARASCU72@MAIL.COM ET ELENABARASCU@VALAHIA.RO
In this study was monitored the growth and the activity of bifidobacteria in reconstituted milk, with different content of nonfat dry milk, in order to obtain optimal conditions of culture for this bacteria. In addition, the possibility to obtaining the useful date for the technology of probiotic milks, fermented with bifidobacteria in pure cultures, was evaluated. In the present, the most probiotic fermented milks available in the marketplace contain mixed cultures of bifidobacteria and other lactic acid bacteria. Milk with 12.4% nonfat dry milk provides the most numbering population of bifidobacteria. The utilization of nonfat dry milk in concentration more than 12.4% is not justified because the growth of bifidobacteria is not proportional with the addition of nonfat dry milk. The developed acidity during the incubation was greatest in the same sample (with 12% nonfat dry milk) and this was correlated with the best growth of bifidobacteria.
