Table 1 Estimated glucose and glycerol conversion rates calculated with the logistic model (in h⁻¹) and simple linear regression (in mg substrate h⁻¹) for (a) treatments with single and mixed substrate in Experiment I and (b) single substrate controls at 5 bar pCO₂ (glucose GLU_CO2 and glycerol GLY_CO2), mixed substrate control at 5 bar pN₂ (GG_N2) and treatments with mixed substrate at 5 bar pCO₂ (GG_CO2) in the different phases of Experiment II

I

Single substrate—glucose

Logistic

− 0.36*** (0.95)

k (h⁻¹)

Single substrate—glycerol

Linear regression

− 7.4*** (0.96)

(mg Glycerol h⁻¹)

Mix substrate

Logistic + linear regression

− 1.10*** (0.95)

− 4.7*** (0.99)

k (h⁻¹) (mg Glycerol h⁻¹)

II

Single substrate—glucose (GLU_CO2)

II-A

Logistic

− 0.15** (0.99)

k (h⁻¹)

II-B

NA

II-C

− 0.41*** (0.99)

Single substrate—glycerol (GLY_CO2)

II-A

− 0.04*** (0.98)

II-B

− 0.21** (0.99)

II-C

− 0.36*** (0.99)

Mixed substrate (GG_CO2)

II-A

− 0.12*** (0.99)

− 0.27*** (0.99)

II-B

NA

− 0.03*** (0.99)

II-C

− 0.27** (0.98)

− 0.07* (0.89)

Mixed substrate (GG_N2)

II-A

NA

− 0.29** (0.99)

II-B

NA

− 0.19*** (0.99)

II-C

NA

− 1.95* (0.99)