标题：Growth and activity of Propionibacterium shermanii bacterial culture in skim milk, skim milk retentate and skim milk retentate mixtures and demineralized whey retentate
摘要：Growth and activity of Propionbacterium shermanii in skim milk, skim milk retentate thickened to 1/2 and 1/3 of initial volume and In mixture of skim milk retentate and demineralized whey retentate (ratios 80 : 20, 70 : 30 and 50 : 50) were studied. P. shermanii culture fermenting milk attained pH 4,6 after 24 hours. The maximum number of cells/ml is reached In milk In the vicinity of 10^7 (ml^-1), and corresponding count in milk retentate is 10^9 (ml^-1) ceels. The addition of demineralized whey retentate (30 to 50 %) to milk retentate (thickened to 1/3 of Initial volume) delayed the achievement of maximum cells' number (10^9/ml) to over 26 hours of fermentation.
关键词：Propionbacterium shermanii culture;; growth activity in different media (skim milk; skim milk retentate; mixtures of skim milk retentate and demineralized whey retentate).
