PRINT ISSN 1222-5304, ISSN-L: 2065-1295, ISSN CD: 2343-9394,ISSN ONLINE 2067-3663
 

COMPARATIVE STUDY OF ACIDIFYING ACTIVITY OF SOME STARTER CULTURES USED IN DAIRY INDUSTRY

Published in Scientific Works. Series C. Veterinary Medicine, Vol. LXIII, Issue 2
Written by Andrei TOPOLICEANU, Mimi DOBREA, Gabriel GAJAILA, Mara GEORGESCU, Gabriel MURARIU

Four starter cultures used in dairy industry were investigated in this study for their acidifying activity. Two of them are mesophilic cultures R-703 and R-708 and the other two are thermophilic cultures FRC-60 and FRC-75. These cultures were inoculated in sterile cow milk and incubated at 32°C (mesophilic cultures) and at 45°C (thermophilic cultures). The pH value was determined every 2 hours. The acidification profile of all cultures was similar, but the termophilic cultures produced a faster acidification (after 4 hours), than the mesophilic cultures (after 6 to 8 hours). After 10 hours of incubation the pH value of the medium for all studied cultures was stabilized around 4.5.

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