Figure 1From: Reduced complexity of multidimensional and diffusion NMR spectra of soil humic fractions as simplified by Humeomics1H NMR spectra of RES4 (A) and its six size fractions separated by HPSEC F1 to F6 (B to G). Colored rectangles differentiate sets of proton from different functional groups, assigned as follows: aromatic (dark green); olefinic (blue); CHn-X where X = O/N (light green); Alkyl CHn (orange); highly shielded alkyl CHn (purple).Back to article page