Aerobic SMX biodegradation patterns of pure cultures in MSM-CN media. A, B) measured with UV-AM, initial SMX concentration 10 mg L-1. C, D) LC-UV analyses of SMX concentrations in the used pure cultures in MSM-CN. Determination was performed at experimental startup, after 4 and 10 days to verify UV-AM values. Asterisks indicate measured values below limit of detection. Shown are mean values of SMX absorbance in duplicate experiments. Standard deviations were too low to be shown (<1%).