Assertion: lignin | /r/MadeOf | methylene
Facets:
Source sentences:
text: The term "crosslinked" can mean, for example, that the lignin contains methylene (i.e., -CH 2 -) and/or ethylene (i.e., -CH 2 CH 2 -) linkages (i.e., linking groups) between phenyl ring carbon atoms in the lignin structure.