Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 13-26 |
| Seitenumfang | 14 |
| Fachzeitschrift | Wood research |
| Jahrgang | 53 |
| Ausgabenummer | 2 |
| Publikationsstatus | Veröffentlicht - 2008 |
Abstract
The reasons for the increased decay resistance of thermally modified timber (TMT) are not yet fully understood and were therefore exemplarily examined for thermally modified spruce against Oligoporus placenta. Spruce specimens heat treated at 200 and 220°C were successively extracted and additionally treated with 2%-KOH solution to modify the moisture sorption properties. The extracts were surveyed regarding their inhibitory effect on fungal growth, while the extracted specimens were tested against O. placenta to determine the decay resistance. Furthermore, maximum swelling and equilibrium moisture content (EMC) were determined. The decrease in swelling and EMC as well as the increased decay resistance of TMT were not affected by extraction and further on, none of the extracts revealed an inhibitory effect. In contrast, the alkali treatment provoked enhanced moisture sorption of TMT specimens and lead to increased fungal decay at the same time. Thus it is assumed, that the reduced moisture sorption of TMT is mainly responsible for the increased decay resistance.
ASJC Scopus Sachgebiete
- Agrar- und Biowissenschaften (insg.)
- Forstwissenschaften
- Werkstoffwissenschaften (insg.)
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in: Wood research, Jahrgang 53, Nr. 2, 2008, S. 13-26.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Increased resistance of thermally modified Norway spruce timber (TMT) against brown rot decay by Oligoporous placenta - Study on the mode of protective action
AU - Rapp, Andreas Otto
AU - Brischke, Christian
AU - Welzbacher, Christian Robert
AU - Jazayeri, Leyla
PY - 2008
Y1 - 2008
N2 - The reasons for the increased decay resistance of thermally modified timber (TMT) are not yet fully understood and were therefore exemplarily examined for thermally modified spruce against Oligoporus placenta. Spruce specimens heat treated at 200 and 220°C were successively extracted and additionally treated with 2%-KOH solution to modify the moisture sorption properties. The extracts were surveyed regarding their inhibitory effect on fungal growth, while the extracted specimens were tested against O. placenta to determine the decay resistance. Furthermore, maximum swelling and equilibrium moisture content (EMC) were determined. The decrease in swelling and EMC as well as the increased decay resistance of TMT were not affected by extraction and further on, none of the extracts revealed an inhibitory effect. In contrast, the alkali treatment provoked enhanced moisture sorption of TMT specimens and lead to increased fungal decay at the same time. Thus it is assumed, that the reduced moisture sorption of TMT is mainly responsible for the increased decay resistance.
AB - The reasons for the increased decay resistance of thermally modified timber (TMT) are not yet fully understood and were therefore exemplarily examined for thermally modified spruce against Oligoporus placenta. Spruce specimens heat treated at 200 and 220°C were successively extracted and additionally treated with 2%-KOH solution to modify the moisture sorption properties. The extracts were surveyed regarding their inhibitory effect on fungal growth, while the extracted specimens were tested against O. placenta to determine the decay resistance. Furthermore, maximum swelling and equilibrium moisture content (EMC) were determined. The decrease in swelling and EMC as well as the increased decay resistance of TMT were not affected by extraction and further on, none of the extracts revealed an inhibitory effect. In contrast, the alkali treatment provoked enhanced moisture sorption of TMT specimens and lead to increased fungal decay at the same time. Thus it is assumed, that the reduced moisture sorption of TMT is mainly responsible for the increased decay resistance.
KW - Extraction
KW - Fungal decay
KW - Heat treatment
KW - KOH treatment
KW - Moisture sorption
KW - Norway spruce
KW - Swelling properties
UR - http://www.scopus.com/inward/record.url?scp=54549112169&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:54549112169
VL - 53
SP - 13
EP - 26
JO - Wood research
JF - Wood research
SN - 1336-4561
IS - 2
ER -