title: Decay resistance of thermally-modified Eucalyptus grandis wood at 140 degrees C, 160 degrees C, 180 degrees C, 200 degrees C and 220 degrees C.
abstract: The objective of this study was to evaluate the effect of thermal treatment on the biological resistance of Eucalyptus grandis wood to the decay fungus Picnoporus sanguineus. Boards from 5 years and 11 months old E. grandis trees, taken from the stock possessed by the Duratex-SA company, were thermally-modified at 140 degrees C, 160 degrees C, 180 degrees C, 200 degrees C and 220 degrees C in the Laboratory of Wood Drying and Preservation from UNESP, Botucatu, SP, Brazil. Samples of each treatment were treated according to ASTM D-2017 (1994). The experiment tested the accelerated decay caused by the decay fungus P. sanguineus on a system of soil-block wood. The results of thermal treatment showed that an increase of temperature of 180-220 degrees C caused reductions of between 15.7% and 82.4% in the weight loss in the samples from E. grandis incubated with P. sanguineus.
authors.affiliation: UNESP, Department of Natural Resource/Forest Science, Fazenda Experimental Lageado, s/n, Post Box 237, Botucatu, SP, Brazil. fwcalonego@ig.com.br
authors.forename: Fred Willians
authors.initials: FW
authors.lastname: Calonego
authors.forename: Elias Taylor Durgante
authors.initials: ET
authors.lastname: Severo
authors.forename: Edson Luiz
authors.initials: EL
authors.lastname: Furtado
mesh_terms: D005052:Eucalyptus / Q000382:microbiology*; D013696:Temperature; D014934:Wood / Q000382:microbiology*