Figure 3. Enzymatic reduction of nitrate (a) and nitrite (b) by intact cells of Paracoccus pantotrophus P16 after growing with glucose at cultivation times of 24 hrs (∆) and 32 hrs (○) or with ethanol at cultivation times of 24 hrs (▲) and 32 hrs (●). Standard deviations of all measurements did not exceed 5% of corresponding value.