Abstract
Recent and fossil woods from the genus of Sequoiadendron, as well as their milled wood lignins were investigated by means of FTIR spectroscopy and pyrolysis GC/MS technique. Though almost same in appearance the differences in band intensities of FTIR-spectra reveals the distinctly increased aromatic character and the oxidation in fossil specimens. More detailed information about the changes in old wood were obtained by analytical pyrolysis, which delivers degradation products with shortened side chains and more saturated units relating to fossil lignin.
Zusammenfassung
Recentes und fossiles Holz der Gattung Seqoiadendron giganteum, sowie daraus isoliertes Björkman-Lignin wurden mittels FTIR Spektroskopie und GC/MS Pyrolyse-Technik untersucht. Obwohl sich die Holzarten äußerlich sehr ähneln, zeigen die Unterschiede der Bandenintensität in den FTIR Spektren einen deutlich erhöhten, aromatischen Charakter und Oxidationsgrad in den fossilen Proben. Detailliertere Information über Veränderungen in den alten Holzarten wurden durch pyrolytische Analyse gewonnen, welche Abbauprodukte mit kürzeren Seitenketten und gesättigtere Einheiten des fossilen Lignin aufweisen.
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Acknowledgment
G. Uçar expresses his thanks to DAAD for the scholarship of summer 1998.
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Uçar, G., Meier, D., Faix, O. et al. Analytical pyrolysis and FTIR spectroscopy of fossil Sequoiadendron giganteum (Lindl.) wood and MWLs isolated hereof. Holz Roh Werkst 63, 57–63 (2005). https://doi.org/10.1007/s00107-004-0530-x
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DOI: https://doi.org/10.1007/s00107-004-0530-x