Determination of hydroxyl groups in biorefinery resources via quantitative PNMR)-P-31-N- spectroscopy Authors Meng, Xianzhi; Crestini, Claudia; Ben, Haoxi; Hao, Naijia; Pu, Yunqiao; Ragauskas, Arthur J.; and Argyropoulos, Dimitris S. Journal-Book Nature Protocols Year 2019