Inhibition‐threshold substrate concentrations

A proposed substrate inhibition model (M. C. Tseng and M. Wayman, Can. J. Microbiol. , 21 , 994 (1975)), (1)\documentclass{article}\pagestyle{empty}\begin{document}$$\mu = \mu _{\max} S/\left[{K + S} \right],{\rm when}S < S_\theta $$\end{document}(2)\documentclass{article}\pagestyle{empty}\begin{document}$$\mu = \mu _{\max} S/\left[{K + S} \right] - i\left[{S - S_\theta} \right],{\rm when}S > S_\theta $$\end{document} derived from yeast growth rates has been applied to data for bacterial growth: Pseudomonas methanica grown on methanol and Arthrobacter AK19 grown on n ‐butanol. The model represents the experimental data very well.