Abstract

Following structural and cytochemical studies (Part I) on thermally modified ash wood (TMW) by the thermo-vacuum (Termovuoto) process, changes in the distribution of noncellulosic polysaccharides have been investigated in TMW treated for 3 h at 220 by means of immunogold localization methods. Pectins (homogalacturonan, rhamnogalacturonan-I) and xyloglucan were significantly degraded in compound middle lamella (CML), including the middle lamella cell corner regions (CML Xylan and mannan degradation were also visible in fiber cell walls. In particular, degradation of mannan was very significant and showed variation between cell wall regions even within the same cell wall. The degradation of pectins was more significant than that of hemicelluloses. In summary, results suggest that each noncellulosic polysaccharide may have a different degradation process in ash TMWs°C (TMW3 h, 220°C)cc), of all xylem cells after thermal modification.

Keywords

ash, hemicelluloses, immunolocalization, pectins, thermally modified wood (TMW), thermo-vacuum (Termovuoto) process

Published in

Holzforschung
2015, Volume: 69, number: 5, pages: 615-625

SLU Authors

• Kim, Jongsik

  • Department of Forest Products, Swedish University of Agricultural Sciences
    

• Gao, Jie

  • Department of Forest Products, Swedish University of Agricultural Sciences
    

• Daniel, Geoffrey

  • Department of Forest Products, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Wood Science


Publication identifier

DOI: https://doi.org/10.1515/hf-2014-0149

Permanent link to this page (URI)

https://res.slu.se/id/publ/69739