Origin of the acetylated structures present in white birch (Betula pendula Roth) milled wood lignin
Artikel i vetenskaplig tidskrift, 2012

The occurrence and nature of acetate groups in the milled wood lignin (MWL) isolated from birch (Betula pendula Roth) has been addressed by spectroscopic (2D-NMR) and chemical degradative (derivatization followed by reductive cleavage, DFRC) methods. Considerable amounts of acetate groups were present in the MWL preparation. However, 2D-NMR analysis indicated that the lignin polymer is not extensively acetylated and that the major part of the acetate groups is attached to the xylan moieties present in the MWL preparation. Nevertheless, evidence of the presence of minor acetylation of the gamma-carbon of the lignin side chain (< 3% of both syringyl and guaiacyl lignin units) was provided by DFRC analysis.

cleavage

kenaf

sinapyl

2d nmr

acetate

plants

nmr-spectroscopy

ether type

dfrc method

monomers

nuclear-magnetic-resonance

Författare

J. Rencoret

CSIC - Instituto de Recursos Naturales y Agrobiologia de Sevilla (IRNAS)

J. C. del Rio

CSIC - Instituto de Recursos Naturales y Agrobiologia de Sevilla (IRNAS)

A. Gutierrez

CSIC - Instituto de Recursos Naturales y Agrobiologia de Sevilla (IRNAS)

A. T. Martinez

CSIC - Centro de Investigaciones Biologicas (CIB)

Shiming Li

Chalmers, Kemi- och bioteknik, Fysikalisk kemi

Knut Lundquist

Chalmers, Kemi- och bioteknik, Skogsindustriell kemiteknik

Wood Science and Technology

0043-7719 (ISSN) 1432-5225 (eISSN)

Vol. 46 1-3 459-471

Ämneskategorier

Pappers-, massa- och fiberteknik

DOI

10.1007/s00226-011-0417-z