Assertion: lignin's amount | /r/HasProperty | 3.1 spruce
Facets:
Source sentences:
text: (2013) have reported only some differences between spruce and birch kraft lignins; the total amount of aromatic hydroxyl groups 4.1 (spruce) and 4.3 (birch) mmol/g, total amount of aliphatic hydroxyl groups 3.1 (spruce) and 1.7 (birch) mmol/g, and total content of sulfur 1.4 to 1.6 (spruce) and 2.2 to 2.4 (birch) %.