FIG 6.

Generation rates of biomass (dry weight), CO₂, and hydrogen in response to increases in sucrose feeding rates of A. vinelandii strains growing in chemostat culture (D = 0.066 h⁻¹) at 30°C in iron-sufficient, nitrogen-free Burk medium. Triangles (△) give values for strain CA, circles (○) for HS2, empty squares (□) for CA6, and filled squares (■) for CA6 plus tungsten. Error bars (present for all points) indicate standard deviations. Yield values given in Table 4 were obtained for each strain by calculating the slope of the best-fit line for these points for each strain. (A) Dry weight values, in carbon moles (standardized by moles of carbon); (B) values for hydrogen, given as hydrogen produced, i.e., total hydrogen minus environmental hydrogen; (C) values for CO₂, given as CO₂ produced, i.e., total CO₂ minus environmental CO₂.