It seems incomprehensible that new structures in lignins and new pathways in lignification remain to be discovered after all this time. With new technologies and the improved understanding of the process that comes from new ways to perturb lignification, such discoveries continue to be made, however. Some may be of rather academic interest only, while others underlie important new approaches to...

Poplar (Populus tremula x alba) lignins with exceedingly high syringyl monomer levels are produced by overexpression of the ferulate 5-hydroxylase (F5H) gene driven by a cinnamate 4-hydroxylase (C4H) promoter. Compositional data derived from both standard degradative methods and NMR analyses of the entire lignin component (as well as isolated lignin fraction) indicated that the C4HF5H transgeni...

This work deals with lignin antioxidant properties in polypropylene. We extracted and characterised 15 lignin samples from various botanical origins (wheat straw and wheat bran) using different processes of extraction and using industrial Kraft lignins fractions (Westaco). These lignins were incorporated in polypropylene (1% weight). We underline the effect of lignin solubility in PP on stabili...

Lignocellulosic biomass (Moso Bamboo, Chinese tallow tree wood, switchgrass, and pine wood) was subjected to a novel delignification process using microwave energy in a binary glycerol/methanol solvent. The physicochemical properties of the recovered lignin were analyzed prior to its application in the fabrication of polylactic acid (PLA)–lignin composites. The results showed that the samples h...

Lignin is a precursor of humus, and by-product the pulp paper industry. This study investigated synthesis soil conditioning materials from industrial lignins (kraft, soda sulphite), through ammoxidation. The were characterized ammoxidized in 1 L Parr reactor at 80 °C, 10 barg, for 4 h, with 7 wt% ammonia lignin reaction mixture. A plant trial assessment products was conducted over four weeks. N...