In the denitrifying growth of R. sphaeroides S, the evaluation of growth yield based on electron equivalent (Y,,,) has already been analyzed in order to evaluate the efficiency of energy conversion (11, 12).
where ENo3 and ENoz are the electron equivalents to the reduction of nitrate and nitrite to NZ, respectively. ENo3 and EN02 are -5 and -3 equivalents/mol, respectively (11).