Significance of lignin S/G ratio in biomass recalcitrance of Populus trichocarpa variants for bioethanol production Authors Yoo, Chang Geun; Dumitrache, Alexandru; Muchero, Wellington; Natzke, Jace; Akinosho, Hannah; Li, Mi; Sykes, Robert W.; Brown, Steven D.; Davison Brian H.; Tuskan, Gerald A.; Pu, Yunqiao; Ragauskas, Arthur J. Journal-Book ACS Sustainable Chemistry and Engineering Year 2018