Abstract

A study has been made of the kinetics of two strains of the sheath-forming bacterium Halisco menobacter hydrossis (syn. Streptothrix hyalina) by growing the bacteria axenically in continuous culture, with glucose as the limiting substrate. The maximum specific growth rates were approx. 0.05 h −1 for strain AN and 0.09h −1 for strain AZ, corresponding to minimum doubling times of 14 and 9h, respectively. Depending on the history of the population, appreciably lower values were found in batch experiments. The maintenance coefficient was low, 20 and 21 mg glucose (g biomass) −1 h −1 for strain AN and strain AZ, respectively. The “true” yield coefficients were 0.59 and 0.42 g biomass (g glucose) −1, for strain AN and strain AZ, respectively.

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