Rast i aktivnost bakterijske kulture Propionibacterium shermanii u obranom mlijeku, retentatu obranog mlijeka i u smjesama retentata obranog mlijeka i retentata demineralizirane sirutke
| Autor: | Ljerka Kršev, Branka Magdalenić, Ljubica Tratnik |
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| Jazyk: | chorvatština |
| Rok vydání: | 1994 |
| Předmět: |
Propionbacterium shermanii culture
growth activity in different media (skim milk skim milk retentate mixtures of skim milk retentate and demineralized whey retentate) Propionbacterium shermanii kultura rast aktivnost u različitim supstratima (obrano mlijeko retentat obranog mlijeka smjese retentata obranog mlijeka i retentata demineralizirane sirutke) |
| Zdroj: | Mljekarstvo : časopis za unaprjeđenje proizvodnje i prerade mlijeka Volume 44 Issue 2 |
| ISSN: | 1846-4025 0026-704X |
| Popis: | U obranom mlijeku, retentatu obranog mlijeka (ugušćenog do 1/2 i 1/3 početnog volumena) i u mješavini retentata obranog mlijeka i retentata demineralizirane sirutke (u omjerima 80 :20, 70 :30 i 50 :50) praćeni su rast i aktivnost bakterije Propionibacterium shermanii. Fermentacijom mlijeka bakterijom P. shermanii postiže se pH 4,6 nakon 24 sata. Maksimalan broj stanica/ml mlijeka dostiže se u redu veličine 10^7 (ml^-1) dok se u retentatu mlijeka postiže 10^9 (ml^-1) stanica. Dodatkom retentata demineralizirane sirutke u retentat mlijeka (ugušćenog do 1/3 početnog volumena) maksimalan broj stanica u ml (10^9/ml) postiže se uz veći dodatak retentata demineralizirane sirutke (30 i 50%) i to za 26 sati fermentacije bakterijom P. shermanii. 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. |
| Databáze: | OpenAIRE |
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