Vergleich der Extrakte und des Lignins aus frischem und gelagertem Kiefernholz (Pinus sylvestris L.) |
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| Authors: | D. Fengel P. Stöcklhuber |
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| Affiliation: | 1. Institut für Holzforschung der Universit?t München, München, Deutschland
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| Abstract: | The degradation processes of the extractives of pine wood caused by aging are only noticeable in the heartwood. In seasoned sapwood the percentages of the water extracts and the cyclohexane-ethanol extract increase compared with the green sample; the alkali extracts, however, do not vary. The contents of acid lignin as well as the UV and IR spectra of MWL do not show differences. The amount of OCH3/C9 is in all samples 0.96, but the degree of oxidation is higher in the seasoned wood than in the green one. |
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