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Effect of growth parameters on the residual activity of Lactobacillus plantarum after drying
Author(s) -
Linders L.J.M.,
Meerdink G.,
Van ‘t Riet K.
Publication year - 1997
Publication title -
journal of applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 1364-5072
DOI - 10.1046/j.1365-2672.1997.00183.x
Subject(s) - bioprocess , lactobacillus plantarum , bioprocess engineering , agricultural science , library science , microbiology and biotechnology , engineering , biology , computer science , lactic acid , bacteria , genetics , chemical engineering
In order to select optimal conditions for the production of dry and active starter cultures it is important to determine the influence of growth conditions on the residual activity of dried bacteria. The influence of medium composition, pH during growth, continuous vs batch reactor and growth phase was studied on the residual activity of Lactobacillus plantarum after drying. The effect of high sodium chloride concentrations during growth on the residual activity of Lact. plantarum after drying was measured. The samples were dried by convection and in a fluidized bed. Bacteria with the highest residual activity after drying were produced in batch or chemostat with pH‐controlled growth using enriched or diluted MRS medium. The presence of 1 or 1·25 mol l −1 NaCl during growth resulted in a decreased residual activity after drying. Variations in growth conditions (application of stress) generally did not result in higher residual activities after drying.