612132.fig.003
Figure 3: Normalized average spectra for each of the four marine particle types and (below) corresponding reference spectra with similar features. Spectra were reproduced from [41] (alginic acid), [38] (carbohydrate and protein-like marine POM), and http://xray1.physics.sunysb.edu/~micros/xas/xas.html, unpublished (CaCO ). Vertical grey lines mark relevant transitions (from left to right): 285 eV (R(C = C)R ), 286.7 eV (R(C=O)R ), 288.1 eV (R(C–H) R ), 288.3 eV (R–NH(C=O)R ), 289.5 eV (R–COH), 290.4 eV ( ), 292 eV (R(C–H) R ), 297.4 eV (K), and 299 eV (K).