Figure 2: Growth characteristics and carbon cycle for G. sulfurreducens DL-1.
From: Probing single- to multi-cell level charge transport in Geobacter sulfurreducens DL-1

Growth of the inoculating culture was characterized using optical density at 600 nm with simultaneous measurement of acetate and fumarate concentration by HPLC. The growth phase was important to allow for reproducible results during replicate single-cell measurements. Cultures were utilized at early stationary phase, which was ~40 h after inoculation and 10 h before complete acetate consumption.