Assertion: lignin | /r/CapableOf | present complex structure
Facets:
Source sentences:
text: The thermal degradation of lignin occurred over a wide temperature range (200 to 400 °C) and can be explained by the fact that lignin presented a complex structure made up of phenolic hydroxyl, carbonyl groups, and benzylic hydroxyl, interlinked by various types of chemical linkages, which are connected by straight carbon-to-carbon links (Sjöström 1993; Domínguez et al. 2008).