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Fig. 10 | Heritage Science

Fig. 10

From: A review of analytical methods for assessing preservation in waterlogged archaeological wood and their application in practice

Fig. 10

(Adapted with permission from Bardet et al. [117]. Copyright American Chemical Society, 2002.)

Examples of a typical 13C-CPMAS high-resolution solid-state NMR spectra of: modern beech (a) and archaeological beech samples (b) and (c). Peaks relating to either celluloses (C) or lignin (L) are highlighted. An increase in relative intensity of the lignin compared to carbohydrate peaks is observed in archaeological samples. Signal 16 relates to CH3 groups in hemicellulose and is completely absent in the archaeological samples. Signal 2 relates to ß-O-4 linkages and is retained in all samples

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