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. Author manuscript; available in PMC: 2017 May 3.
Published in final edited form as: RSC Adv. 2016 May 3;6:46134–46142. doi: 10.1039/C6RA06468J

Table 1.

Bacteria used in the testing of pH sensors.

Bacterium Gram reaction Metabolism Main products of fermentation References
L fermentum positive facultative anaerobic lactic acid, ethanol, CO2 53, 54
E. coli negative facultative anaerobic acetate, ethanol etc. 57-59
B. subtilis positive facultative anaerobic 2,3-butanediol, ethanol and acetate. 60-63