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Preparation of Arabinoxylan and its Sorption on Bacterial Cellulose During Cultivation
Author(s) -
Winter Heiko,
Barakat Abdellatif,
Cathala Bernard,
Saake Bodo
Publication year - 2005
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200551409
Subject(s) - arabinoxylan , sorption , cellulose , molar mass , lignin , crystallinity , chemistry , bacterial cellulose , hemicellulose , hydrolysis , polysaccharide , xylan , xylanase , nuclear chemistry , chromatography , organic chemistry , polymer , enzyme , adsorption , crystallography
The sorption of arabinoxylan (AX) on bacterial cellulose was investigated by adding AX to the culture medium of Gluconacetobacter xylinus . The starting AX material was produced by alkaline extraction of oat spelts. To investigate the impact of varying AX quality, the residual lignin was reduced by ClO 2 bleaching. Furthermore, bleached and unbleached xylans were subjected to xylanase hydrolysis in order to produce fractions of varying molar mass. Of all samples only the water soluble fractions were used for sorption experiments. A reduced molar mass resulted in a lower sorption of AX to the cellulose, while the lignin content increased the sorption of AX on bacterial cellulose. The sorption of AX resulted in a reduction of bacterial cellulose crystallinity and cellulose Iα content. In combined treatments of AX with xyloglucan and β‐glucan no synergistic effect of those polysaccharides on the AX sorption was found.