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. 2018 Jun 8;9:1234. doi: 10.3389/fmicb.2018.01234

FIGURE 2.

FIGURE 2

C K-edge sXAS spectra [in total electron yield (TEY) mode] of DOM during incubation (one of the three replicates was presented at each time point). C = C bond is shown as 285–287 eV; C = O bond is 288.2–288.7 eV; and C–O bond is 289.1–289.4 eV.