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Characterization of Hardwood Lignin: Investigation of Syringyl/Guaiacyl Composition by 13C Nuclear Magnetic Resonance Spectroscopy
| Content Provider | Semantic Scholar |
|---|---|
| Author | Obst, John R. Ralph, John |
| Copyright Year | 1983 |
| Abstract | Carbon-13 nuclear magnetic resonance Spectroscopy was investigated äs a method to determine the relative syringyl/guaiacyl composition of hardwood lignins. By this technique, red oak fiber and middle lamella milled wood lignins (MWLs) were similar while white birch MWLs from different morphological regions gave apparent differences in their syringyl/guaiacyl ratios. However, methoxyl contents of MWLs were similar, indicating the unsuitability of carbon magnetic resonance Spectroscopy, äs performed, äs a quantitative method. A correlation was noted between the measured carbon magnetic resonance syringyl/ guaiacyl ratio and the molecular weight distribution of the MWLs. Molecular weight distributions of the MWLs suggested that birch middle lamella lignin was higher in molecular weight than fiber cell wall lignin. |
| Starting Page | 297 |
| Ending Page | 302 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| DOI | 10.1515/hfsg.1983.37.6.297 |
| Volume Number | 37 |
| Alternate Webpage(s) | https://www.fpl.fs.fed.us/documnts/pdf1983/obst83b.pdf |
| Alternate Webpage(s) | https://doi.org/10.1515/hfsg.1983.37.6.297 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |