Fig. 7.

Long-term analysis of various reservoir compositions without biology. Left column: Reservoir composition with various initial glucose concentrations and 40 g/L ammonium carbonate, depiction of a ammonium concentration; d glucose concentration; g absorbance measurement to characterize Maillard reaction compounds; j pH; middle column: reservoir composition with various initial glucose concentrations and 50.47 g/L ammonium sulfate, depiction of b ammonium concentration; e glucose concentration; h absorbance measurement; k pH; right column: reservoir composition with various initial glucose concentrations with 40 g/L ammonium carbonate and initial pH adjusted to 7.5 with sulfuric acid, depiction of c ammonium concentration; f glucose concentration; i absorbance measurement; l pH; conditions: temperature: 37 °C, volume: 45 mL, initial glucose concentration: 250/375/500/750 g/L, blue dextran concentration: 1 g/L