Elemental yield coefficients for nitrogen and carbon determined for P. olevorans during growth in the chemostat with octanoate and ammonium under either nitrogen- or carbon-limited conditions, as a function of the dilution rate. Symbols: ▴, YX/N for carbon-limited growth; ▵, YX/N for nitrogen-limited growth; ■, YX/C for carbon-limited growth; □, YX/C for nitrogen-limited growth; ●, YX/N of PHA-free biomass for carbon-limited growth; ○, YX/N of PHA-free biomass for nitrogen-limited growth.