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. 2015 Oct 2;1(9):e1500531. doi: 10.1126/sciadv.1500531

Fig. 2. Examples of FT-ICR-MS spectra of mesocosm DOM at different time points and with different treatments.

Fig. 2

(A) Day −1 after closing mesocosm bags. (B) Day 103 ambient PCO2 mesocosm. (C) Day 103 high PCO2 mesocosm. Mass range is from 150 to 750 daltons and zoomed into one exemplary nominal mass (251 daltons). m/z, mass/charge ratio. The peak in the gray shaded area is exemplary of mass peaks that show a significant difference in intensities between day 1 and day 103 in a Student’s t test (P < 0.001).