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Fig. 8. Carbon-13 nuclear magnetic resonance (NMR) spectra at 75 MHz for the <2-mm mineral soil fraction (MIN-FLOAT) Plot 11: (a) cross-polarization with magic-angle spinning (CPMAS); (b) CP with total suppression of sidebands (TOSS); (c) single-pulse excitation (SPE) after background correction; and (d) dipolar dephasing (DD) with TOSS.
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