SEARCH Articles Figures Tables Acidic xylan, methylation analysis Aldobiouronic acids, from acidic xylans Birch, acidic xylan from Birch, acidic xylan from holocellulose Xylan Xylan nitric acid oxidation Xylan uronic acid content Xylane Xylans acidic, acid hydrolysis Xylans acidic, structure Xylans, acetates acid side chains