id	keyword
brj-22297	bfs
brj-22297	pretreatment
brj-22297	bamboo
brj-22297	fiber
brj-22297	doi
brj-22297	alkali
brj-22297	lignin
brj-22297	et al
brj-22297	surface
brj-22297	hemicellulose
brj-22297	pressure