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Oxidation of atmospheric methane in the St culture after 10 days of exposure to laboratory air. Equal volumes of CH3OH, NaCOOH (166.7 μM pulses), or water were added as indicated by the arrows. Uptake rates are denoted by k. Note the logarithmic vertical axis (k of 1 equals 30 nl of CH4 oxidized h−1 at 1 ppmv of CH4).
