Assertion: lignin's rigidity | /r/HasProperty | structural
Facets:
Source sentences:
text: Lignin is formed between the wood fiber walls and mainly acts as a cement-like material, imparting structural rigidity to the wood.
text: The valorization of lignin is essential to increase the sustainability and economic feasibility of the bio-refinery process, although the decomposition of lignin is complicated by its structural rigidity.