Assertion: crude lignin | /r/HasAspect | wide absorption band
Facets:
value: at 3410 cm-1
type: OTHER
Source sentences:
text: As shown in Fig 1, all crude lignin had a wide absorption band at 3410 cm-1 caused by the O-H stretching vibration of hydroxyl groups, which represented the typical function group of lignin (Huang et al. 2012).