Time course study of RDX biodegradation with Rhodococcus sp. strain DN22. (Top) Removal of RDX (○), growth of cells (•), evolution of nitrite (□), and nitrous oxide (×). (Bottom) Removal of RDX (○), evolution of formaldehyde (□), and cumulative percentage of 14CO2 (×). Values are the averages and standard deviations of duplicate experiments.