caa a22 4500 463247647 CHVBK 20180405153330.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10086-006-0860-x doi (NATIONALLICENCE)springer-10.1007/s10086-006-0860-x Characterization of lignin-carbohydrate linkages in the residual lignins isolated from chemical pulps of spruce ( Picea abies ) and beech wood ( Fagus sylvatica ) [Elektronische Daten] [Joon Choi, Don-Ha Choi, Oskar Faix] To investigate the linkage types between carbohydrates and lignin, residual lignins were isolated from three different unbleached pulps [kraft, alkaline sulfite anthraquinone methanol (ASAM), and soda with anthraquinone (AQ) and methanol] of spruce and beech wood and then characterized by oxidation with 2,3-Dichloro-5,6-dicyanobenzoquinone and followed by Prehm's methylation. In residual lignins, sugar moieties were bound to lignins via benzyl ether bonds. In particular, galactose and mannose are predominantly linked to lignin fragments in residual lignins of spruce wood, while xylose and galactose are favored in the formation of LC bonds in the residual lignins of beech wood. In the case of hexoses, primary hydroxyl groups (C6 position) preferentially take part in benzyl ether linkages. Hydroxyl groups in the C2 and C3 positions of xylose participate in LC bonds and a small portion of arabinose was notably connected to lignin via the C5 position. Approximately seven or eight sugars were connected in soda/AQ/methanol residual lignin per 100 C9 lignin units, while the frequencies of LC bonds in kraft and ASAM residual lignins were distinctively less at one to three sugars per 100 C9 lignin units. The Japan Wood Research Society, 2007 Spruce wood ( Picea abies ) nationallicence Beech wood ( Fagus sylvatica ) nationallicence Residual lignin nationallicence DDQ oxidation nationallicence Lignin-carbohydrate complex (LCC) nationallicence Choi Joon Division of Wood Chemistry and Microbiology, Korea Forest Research Institute, 130-712, Seoul, Republic of Korea aut Choi Don-Ha Division of Wood Chemistry and Microbiology, Korea Forest Research Institute, 130-712, Seoul, Republic of Korea aut Faix Oskar Institute of Wood Chemistry and Chemical Technology of Wood, Federal Research Center for Forestry and Forest Products (BFH), 21031, Hamburg, Germany aut Journal of Wood Science Springer-Verlag 53/4(2007-08-01), 309-313 1435-0211 53:4<309 2007 53 10086 https://doi.org/10.1007/s10086-006-0860-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10086-006-0860-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Choi Joon Division of Wood Chemistry and Microbiology, Korea Forest Research Institute, 130-712, Seoul, Republic of Korea aut NATIONALLICENCE 700 1- Choi Don-Ha Division of Wood Chemistry and Microbiology, Korea Forest Research Institute, 130-712, Seoul, Republic of Korea aut NATIONALLICENCE 700 1- Faix Oskar Institute of Wood Chemistry and Chemical Technology of Wood, Federal Research Center for Forestry and Forest Products (BFH), 21031, Hamburg, Germany aut NATIONALLICENCE 773 0- Journal of Wood Science Springer-Verlag 53/4(2007-08-01), 309-313 1435-0211 53:4<309 2007 53 10086 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer