Figure 1 | Scientific Reports

Figure 1

From: Plant Species Rather Than Climate Greatly Alters the Temporal Pattern of Litter Chemical Composition During Long-Term Decomposition

Figure 1

Spectral editing for undecomposed Acer saccharum (ACSA), Drypetes glauca (DRGL), Pinus resinosa (PIRE) and Thuja plicata (THPL);

(a–d) full CP/TOSS spectra for reference with a contact time of 1 ms; (a1–d1) dipolar dephasing spectra showing nonprotonated C and mobile segments such as CH3 and OCH3 with 40 μs dephasing time; (a2–d2) selection of alkyl C with a 13C CSA filter, which in particular identifies OCO-C typical of sugar rings (CSA filter time = 47 μs); (a3–d3) selection of nonprotonated and mobile alkyl C with a CSA filter and dipolar dephasing, which in particular identifies OC (RR’)O-C (CSA filter time = 47 μs; dipolar dephasing time = 40 μs); (a4–d4) selection of protonated alkyl C with a CSA filter and short CP, in particular OCHO around 100 ppm (CSA filter time = 47 μs; CP time = 50 μs); (a5–d5) selection of protonated-C-only groups.

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