Origin of the acetylated structures present in white birch (Betula pendula Roth) milled wood lignin
Origin of the acetylated structures present in white birch (Betula pendula Roth) milled wood lignin
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白桦（Betula pendula Roth）磨碎木质素中乙酰化结构的起源
DOI：
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发表时间：
2011
影响因子：
3.4
通讯作者：
K. Lundquist
中科院分区：
文献类型：
--
作者：
J. Rencoret;J. D. del Río;A. Gutiérrez;Angel T. Martı́nez;Shiming Li;J. Parkås;K. Lundquist
采用光谱（2D-NMR）和化学降解（衍生化还原裂解，DFRC）方法研究了从白桦（Betula pendula Roth）中提取的木质素中乙酸酯基的存在和性质。在MWL制剂中存在相当数量的乙酸酯基团。然而，2D-NMR分析表明，木质素聚合物没有被广泛乙酰化，并且乙酸酯基团的主要部分连接到MWL制备中存在的木聚糖部分。然而，DFRC分析提供了木质素侧链的γ-碳存在少量乙酰化的证据（<3%的双辛基和愈创木基木质素单元）。
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 γ-carbon of the lignin side chain (<3% of both syringyl and guaiacyl lignin units) was provided by DFRC analysis.
影响因子：
3.2
作者：
Kim H;Ralph J
通讯作者：
Ralph J