Assertion: alkaline lignin | /r/HasProperty | al
Facets:
Source sentences:
text: Alkaline lignin (AL) is obtained as a by-product from black liquor, a waste discharged from paper mills in large quantities which can pose a major problem of disposal.
text: The alkaline lignin (AL) used for the preparation of hydroxymethylated lignin was supplied by South China University of Technology, Guangzhou, China.