Assertion: lignin's bond | /r/RelatedTo | syringyl units
Facets:
value: primarily
type: DEGREE
Source sentences:
text: The higher value obtained when NaOH was used as a catalyst can be explain by the different linkages in each sample of lignin, where the -O-4 ether bond is the most common linkage in lignin from E. globulus and is primarily associated with syringyl units.