RT Journal Article SR Electronic(1) A1 Hopton, J. W.YR 1958 T1 The Differential Effect of Temperature on Gas Production by a Coliform Orǵanism JF Microbiology, VO 19 IS 3 SP 507 OP 516 DO https://doi.org/10.1099/00221287-19-3-507 PB Microbiology Society, SN 1465-2080, AB SUMMARY: The influence of the temperature of incubation on the course of formic acid and gas production by cultures of a coliform organism growing in buffered and unbuffered peptone media was studied. The evidence suggests that at 30° and at 37° the onset of gas production is determined by the concentration of undissociated formic acid in the culture, but that a higher concentration of acid is required to elicit response at 37° than at 30°. Undissociated formic acid is toxic to the organism and it appears that gas is not produced in unbuffered glucose medium at 37° because the environmental conditions do not allow elaboration of hydrogenlyase before inhibitory conditions of pH value and formate concentration are attained., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-19-3-507