Table 2.

Equations used for primary model developmenta

Table 2.
  • a Ethanol production was not modeled, as only the ethanol concentrations of end samples were measured. X, cell counts of the growing population (CFU ml−1); Xmax,R and Xmax,N, maximum cell counts (CFU ml−1) on residual carbohydrates and nucleosides, respectively; λ, lag time (h); μmax,R and μmax,N (either μmax,In or μmax,Ao), maximum specific growth rate (h−1) on residual carbohydrates and nucleosides, respectively; [In], [Ao], [Hx], and [Ai], concentrations (mM) of inosine, adenosine, hypoxanthine, and adenine, respectively; kIn and kAo, specific rate constants (mM [h CFU ml−1]−1) for the catabolism of inosine and adenosine, respectively; YHx/In and YAi/Ao, yield coefficients (mM [mM]−1) for the excretion of hypoxanthine and adenine from inosine and adenosine, respectively; [L], [A], [F], and [N], concentrations (mM) of lactic acid, acetic acid, formic acid, and nucleosides, respectively; YL/N, YA/N, and YF/N, yield coefficients (mM [mM]−1) for the production of lactic acid, acetic acid, and formic acid, respectively, produced from the nucleosides inosine or adenosine; [Arg], [Cit], and [Orn], concentrations (mM) of arginine, citrulline, and ornithine, respectively; and kAC(M h CFU ml−1]−1), KAO (M h CFU ml−1]−1), and kCO(M [h CFU ml−1]−1) specific rate constants.