1997 Volume 61 Issue 4 Pages 604-608
The growth of a newly isolated strain of Pediococcus sp., designated ISK-1, was very slow and the concentration of cells in the medium remained low. Fermentation with an initial 30 g/liter glucose required about 60h. To stimulate fermentation, we attempted to optimize the medium by flask culture and jar fermentation tests. Mevalonic acid and mieki (soy bean hydrolyzate) stimulated fermentation and increased the rate of formation of DL-lactate. Kinetic analysis of the fermentation showed that mevalonic acid markedly increased the specitic glucose consumption rate and the specific lactate production rate. Mieki and mevalonic acid had a synergistic effect, but the effect of mevalonic acid was different from that of mieki.
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