Fig. 5

Time course of residual macronutrient concentrations for nitrogen, phosphorus, sulfur, and carbon in photobioreactor cultivations of Synechocystis sp. PCC 6714 cultivated photoautotrophically and with nitrate as the nitrogen source is shown a in the culture supernatant b intracellular concentration of the macronutrients. *The vertical bar represents the start of the limitation phase. The values shown are the mean of three individual experiments, a single standard deviation is given as error bar