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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.2: 13th ISWFPC Sessions - Oral Papers; 20050516-19; Auckland(NZ) >Chemical properties in CAD-deficient pine and their effect on pulping
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Chemical properties in CAD-deficient pine and their effect on pulping

机译：缺乏CAD的松树的化学性质及其对制浆的影响

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Incremental cores of 200 selected trees were collected from a 10 years old open pollinated family trail growing under two nutrition treatment in Scotland County, North Carolina. We analyzed wood density, chemical and pulping properties Analysis of the samples with NIR allows estimation of lignin, α-cellulose and hemicellulose contents in each annual ring. Analysis of selected samples by quantitative ~(13)C NMR showed almost no differences between cad-n1 and wild-type MWL isolated from juvenile wood. However, there were some differences between cad-n1 and wild MWL isolated from mature wood. A micro technique was developed to allow isolation and comprehensive analysis of lignin using the amount of wood that can be obtained from each annual ring in an incremental core. Analysis of a fraction of crude MWL containing concentrated LC fragments allows detection and quantification of phenyl-glycoside bonds. Ester bonds between uronic acids and γ-position of lignin were detected in contrast to benzyl ester linkages. Heterozygote did not show any significant differences in kraft pulping as compared to pulping of the wild type. ~(13)C NMR studies showed that the structure of the kraft lignin isolated from pulping of CAD-deficient pine is rather similar to that of the control.
机译：在北卡罗来纳州苏格兰县，采用两种营养处理，从生长了10年的开放授粉家庭小径收集了200棵选定树木的增量核心。我们分析了木材的密度，化学和制浆特性。使用NIR对样品进行分析可以估算每个年轮中木质素，α-纤维素和半纤维素的含量。通过定量〜（13）C NMR分析选定的样品，发现cad-n1和从幼木中分离的野生型MWL之间几乎没有差异。但是，cad-n1和从成熟木材中分离的野生MWL之间存在一些差异。开发了一种微技术，可以使用增量芯中每个年轮获得的木材量来分离和全面分析木质素。分析包含浓缩LC片段的粗制MWL的馏分可以检测和定量苯基糖苷键。与苄基酯键相反，检测到了糖醛酸和木质素的γ-位之间的酯键。与野生型制浆相比，杂合子在牛皮纸制浆中没有显示任何显着差异。 〜（13）C NMR研究表明，从缺CAD的松木制浆中分离出的牛皮纸木质素的结构与对照的相当。

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