Effect of structural changes of lignin during the autohydrolysis and organosolv pretreatment on Eucommia ulmoides Oliver for an effective enzymatic hydrolysis

Abdelkafi, 2011, Structural analysis of alfa grass (Stipa tenacissima L.) lignin obtained by acetic acid/formic acid delignification, Biomacromolecules, 12, 3895, 10.1021/bm2008179 Björkman, 1956, Studies on finely divided wood. Part 1. Extraction of lignin with neutral solvents, Sven. Papperstidn., 59, 477 Cetin, 2002, Use of organosolv lignin in phenol–formaldehyde resins for particleboard production: I. Organosolv lignin modified resins, Int. J. Adhes. Adhes., 22, 477, 10.1016/S0143-7496(02)00058-1 Chandra, 2007, Substrate pretreatment: the key to effective enzymatic hydrolysis of lignocellulosics?, Adv. Biochem. Eng. Biotechnol., 108, 67 Del Rio, 2009, Structural characterization of the lignin from jute (Corchorus capsularis) fibers, J. Agric. Food Chem., 57, 10271, 10.1021/jf900815x Donohoe, 2008, Visualizing lignin coalescence and migration through maize cell walls following thermochemical pretreatment, Biotechnol. Bioeng., 101, 913, 10.1002/bit.21959 El Hage, 2010, Effect of autohydrolysis of Miscanthus x giganteus on lignin structure and organosolv delignification, Bioresour. Technol., 101, 9321, 10.1016/j.biortech.2010.06.143 Garrote, 2004, Production of substituted oligosaccharides by hydrolytic processing of barley husks, Ind. Eng. Chem. Res., 43, 1608, 10.1021/ie0342762 Gavrilescu, 2014, Chapter 14 – biorefinery systems: an overview, 219 Granata, 1995, 2-Chloro-4, 4, 5, 5-tetramethyl-1, 3, 2-dioxaphospholane, a reagent for the accurate determination of the uncondensed and condensed phenolic moieties in lignins, J. Agric. Food Chem., 43, 1538, 10.1021/jf00054a023 Hallac, 2010, Chemical transformations of Buddleja davidii lignin during ethanol organosolv pretreatment, Energy Fuel, 24, 2723, 10.1021/ef901556u Hu, 2012, Pseudo-lignin formation and its impact on enzymatic hydrolysis, Bioresour. Technol., 117, 7, 10.1016/j.biortech.2012.04.037 Ji, 2006, Effects of planting modes on secondary metabolite contents in Eucommia ulmoides barks, Acta Bot. Boreal. -Occident. Sin., 26, 1911 Kumar, 2012, The lignin present in steam pretreated softwood binds enzymes and limits cellulose accessibility, Bioresour. Technol., 103, 201, 10.1016/j.biortech.2011.09.091 Leschinsky, 2008, Effect of autohydrolysis of Eucalyptus globulus wood on lignin structure. Part 1: Comparison of different lignin fractions formed during water prehydrolysis, Holzforschung, 62, 645, 10.1515/HF.2008.117 Li, 2014, Investigation of lignin deposition on cellulose during hydrothermal pretreatment, its effect on cellulose hydrolysis, and underlying mechanisms, Biotechnol. Bioeng., 111, 485, 10.1002/bit.25108 Li, 2008, Improved lignin properties and reactivity by modifications in the autohydrolysis process of aspen wood, Ind. Crops Prod., 27, 175, 10.1016/j.indcrop.2007.07.022 Li, 2000, Cleavage of arylglycerol beta-aryl others under neutral and acid conditions, Nord. Pulp Pap. Res. J., 15, 292, 10.3183/NPPRJ-2000-15-04-p292-299 Liu, 2010, Woody biomass: Niche position as a source of sustainable renewable chemicals and energy and kinetics of hot-water extraction/hydrolysis, Biotechnol. Adv., 28, 563, 10.1016/j.biotechadv.2010.05.006 Nabarlatz, 2004, Kinetic modeling of the autohydrolysis of lignocellulosic biomass for the production of hemicellulose-derived oligosaccharides, Ind. Eng. Chem. Res., 43, 4124, 10.1021/ie034238i Pan, 2007, Pretreatment of lodgepole pine killed by mountain pine beetle using the ethanol organosolv process: fractionation and process optimization, Ind. Eng. Chem. Res., 46, 2609, 10.1021/ie061576l Pu, 2011, Application of quantitative 31P NMR in biomass lignin and biofuel precursors characterization, Energy Environ. Sci., 4, 3154, 10.1039/c1ee01201k Pu, 2008, The new forestry biofuels sector, Biofuels, Bioprod. Biorefin., 2, 58, 10.1002/bbb.48 Ragauskas, 2014, Lignin valorization: improving lignin processing in the biorefinery, Science, 344, 1246843, 10.1126/science.1246843 Ragauskas, 2006, The path forward for biofuels and biomaterials, Science, 311, 484, 10.1126/science.1114736 Ralph, 2010, 137 Sluiter, A., Hames, B., Ruiz, R., Scarlata, C., Sluiter, J., Templeton, D., Crocker, D., 2008. Determination of structural carbohydrates and lignin in biomass. Laboratory analytical procedure (NERL). Sun, 2015, Assessment of integrated process based on hydrothermal and alkaline treatments for enzymatic saccharification of sweet sorghum stems, Bioresour. Technol., 175, 473, 10.1016/j.biortech.2014.10.111 Thomsen, 2009, Identification and characterization of fermentation inhibitors formed during hydrothermal treatment and following SSF of wheat straw, Appl. Microbiol. Biotechnol., 83, 447, 10.1007/s00253-009-1867-1 Vandenbrink, 2013, Quantitative models of hydrolysis conversion efficiency and biomass crystallinity index for plant breeding, Plant Breeding, 132, 252, 10.1111/pbr.12066 Wen, 2013, Quantitative structures and thermal properties of birch lignins after ionic liquid pretreatment, J. Agric. Food Chem., 61, 635, 10.1021/jf3051939 Wen, 2013, Recent advances in characterization of lignin polymer by solution-state nuclear magnetic resonance (NMR) methodology, Materials, 6, 359, 10.3390/ma6010359 Wen, 2013, Fractionation of bamboo culms by autohydrolysis, organosolv delignification and extended delignification: understanding the fundamental chemistry of the lignin during the integrated process, Bioresour. Technol., 150, 278, 10.1016/j.biortech.2013.10.015 Xiao, 2013, Autohydrolysis of bamboo (Dendrocalamus giganteus Munro) culm for the production of xylo-oligosaccharides, Bioresour. Technol., 138, 63, 10.1016/j.biortech.2013.03.160 Yuan, 2010, Structural and physico-chemical characterization of hemicelluloses from ultrasound-assisted extractions of partially delignified fast-growing poplar wood through organic solvent and alkaline solutions, Biotechnol. Adv., 28, 583, 10.1016/j.biotechadv.2010.05.016