Assertion: lignin's group | /r/HasProperty | sjöström
Facets:
Source sentences:
text: The lignin macromolecule carries multiple functional groups, which are responsible for its reactivity: hydroxyl (either phenolic or aliphatic), methoxyl, carboxyl, carbonyl, benzyl alcohol, hydrolysable ether linkages, and condensed units in C2, C5, and C6 (Sjöström 1993; Brunow et al. 1998; Wang et al. 2017).
text: Molecular representations of the composition of native lignins generally show few, if any, carboxylic acid groups (Sjöström 1993; Frederick 1997), and certainly not enough of them to justify the emphasis depicted in Table 1.