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Abstract
The metabolic activity of the lactic acid bacteria Lactobacillus plantarum and Leuconostoc mesenteroides were determined in mixed cultures by a bioelectrochemical method. Several artificial electron acceptors were tested for their reaction with the two strains. By use of three suitable mediators (potassium hexacyano-ferrate(III), 2,6-dichlorophenolindophenol, toluidin blue O) patterns were measured electrochemically reflecting the microbial reduction of the mediators. A relationship between composition of the mixed cultures and shape of the patterns was observed after an optimal reaction time of 12 min.
