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首页> 外文会议>Appita Annual Conference and Exhibition incorporating the ISWFPC(International Symposium on Wood, Fibre and Pulping Chemistry) vol.3: 13th ISWFPC Sessions - Poster Papers; 20050516-19; Auckland(NZ) >Evolution of lignin - structural characteristics of poly phenolic components of bryophytes, pteridophytes and spermatophytes
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Evolution of lignin - structural characteristics of poly phenolic components of bryophytes, pteridophytes and spermatophytes

机译：木质素的演化-苔藓植物，蕨类植物和种子植物的多酚成分的结构特征

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Bjoerkman lignins were isolated from Selaginella tamariscina and Polystichum polyblepharum after extraction with 80% EtOH followed by water to investigate structural characteristics of lignins. S. tamariscina gave rise to syringaldehyde as the major product by alkaline nitrobenzene oxidation and the molar ratios of syringaldehyde to vanillin (S/V) were 2.21 and 2.31 for the ground sample and the Bjorkman lignin, respectively. The presence of syringyl nuclei as the major component of lignin in S. tamariscina was also supported by the results of UV, FTIR and ~1H-NMR spectroscopies. Furthermore, the presence of arylglycerol-β-aryl ether intermonomer linkage was investigated by acidolysis and ozonation. It was confirmed that lignin of S. tamariscina was typical angiospermous syringyl-guaiacyl type lignin, while lignin of P. polyblepharum was typical gymnospermous guaiacyl type lignin. The low content of methoxyl group and low total yield of alkaline nitrobenzene oxidation products and ozonation products suggest that Klason residue was not represent real lignin content of S. tamariscina and F. polyblepharum.
机译：在用80％乙醇和水萃取后，从卷柏卷柏和多枝多糖中分离了Bjoerkman木质素，以研究木质素的结构特征。 tamariscina通过碱性硝基苯氧化生成主要成分为丁香醛，而地面样品和Bjorkman木质素的丁香醛与香兰素的摩尔比（S / V）分别为2.21和2.31。 tamariscina中木质素的主要成分丁香基核的存在还受到UV，FTIR和〜1H-NMR光谱分析结果的支持。此外，通过酸解和臭氧化研究了芳基甘油-β-芳基醚单体连接的存在。可以确定的是，塔玛链球菌的木质素是典型的被子植物丁香基-愈创木脂型木质素，而聚脂假单胞菌的木质素是典型的裸子植物愈创木脂型愈创木脂型木质素。甲氧基基团含量低，碱性硝基苯氧化产物和臭氧化产物的总收率低，这表明Klason残基不能代表葡萄球菌和多角镰刀菌的真正木质素含量。

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