Your search resulted in 9 documents.
Effect of fungal degradation on the chemical composition of acetylated beech wood
2003 - IRG/WP 03-40267
This study investigated the impact of fungal attack on the chemical composition of acetylated wood. Beech wood acetylated to different degrees was exposed to decay by the white-rot fungus Trametes versicolor under solid-state fermentation conditions. Laboratory soil-bed assays were also conducted to study the degradation of acetylated wood by soft rot fungi and other soil-inhabiting microorganisms...
H Militz, Dong-won Son, L Gómez-Hernández, R Sierra-Alvarez
The Effects of Solar Radiation on the Fungal Colonization and Color of Weathered Wood
2008 - IRG/WP 08-10676
Solar radiation rapidly depolymerizes lignin at wood surfaces exposed outdoors producing a suite of low molecular weight aromatic compounds within weathered wood. Fungi colonizing weathered wood are able to metabolize these aromatic compounds, and many of them also contain high levels of melanin to protect themselves from the harmful effects of UV radiation. Both of these adaptations suggest that ...
V Hernandez, C Breuil, P D Evans
Succession after Fire of Fungal Fruiting Bodies in Mediterranean Pinus pinaster Stands in Spain
2012 - IRG/WP 12-10789
In this study we present the results of a 4-year survey aimed at describing the succession of fungal communities following fire in a Mediterranean ecosystem in Northwest Spain, dominated by Pinus pinaster Ait. After a large wildfire in 2002, six 2 x 50 m study plots were established in burned and unburned areas corresponding to early and late succession stages. During the autumn seasons from 2003 ...
P Vásquez Gassibe, M Hernández-Rodriguez, R Fraile Fabero, J A Oria-De-Rueda, P Martín-Pinto
Effects of UV Radiation on Melanization and Growth of Fungi Isolated from Weathered Wood Surfaces
2015 - IRG/WP 15-10842
This research tests the hypothesis that fungi isolated from weathered wood will respond to elevated levels of UV radiation by increasing their melanin production. To test this hypothesis, we measured the melanin production and mycelial color of Aureobasidium pullulans and Cladosporium cladosporioides, before and after the fungi were grown under artificial UV, visible light and complete darkness. T...
V A Hernández, P D Evans
Toxic effect of Melia azedarach L. unripe fruit extracts onto Reticulitermes flavipes Kollar (Isoptera: Rhinotermitidae)
2015 - IRG/WP 15-10848
The subterranean termite, Reticulitermes flavipes Kollar (Isoptera: Rhinotermitidae), is part of one the major biotic agents which damage wood and it is a pest in several countries, where the economic losses are huge. In Chile there have been foci of infestation in the Metropolitan Region and in the Region of Valparaíso with a big expansion in the last years. This study evaluated in laboratory th...
A Huerta Fuentes, B Rubio Díaz, Í Chiffelle Gómez
Repellency of Schinus molle L. leaf extracts onto Reticulitermes flavipes Kollar (Isoptera: Rhinotermitidae)
2015 - IRG/WP 15-10850
Reticulitermes flavipes Kollar (Isoptera: Rhinotermitidae), is a subterranean termite which damage wood and it is a pest in several countries, where the economic losses are huge. In Chile there have been foci of infestation in the Metropolitan Region and in the Region of Valparaíso with a big expansion in the last years. This study evaluated in laboratory the repellence effect of extracts from Sc...
A Huerta Fuentes, S Constenla Cáceres, Í Chiffelle Gómez
Durability of tropical species from Peru according to European Standards
2020 - IRG/WP 20-10964
Natural durability is defined as the intrinsic resistance of wood against the attack of destructive organisms. There are standardized methods to estimate a durability value. In Europe, the standard EN-350 is responsible for establishing the basic guidelines, as well as the necessary tests to determine this value, which is essential to know the degree of protection needed for the tested wood to ext...
J Valdivia, P Gómez, M T Troya, L Robertson, J A Martín, A Loayza
Geopolymer as a fixation method for tannin-based wood preservatives
2023 - IRG/WP 23-30774
This study aims to test if a second step impregnation with a geopolymer solution can fix Colatan GT10, a commercial extract rich in tannins, to wood, reducing their leaching and improving their performance as wood preservatives. Scots pine sapwood specimens of 40×10×5 mm3 were impregnated with Colatan GT10 tannin mix, geopolymer, and as combined treatment Colatan GT10 with subsequent geopolymer ...
Y M López-Gómez, A Barbero-López, A Haapala
Hydrothermal liquefaction of spent mushroom substrate as a source of antifungals
2023 - IRG/WP 23-30791
The aim of this study was to characterize the chemical composition of hydrothermal liquefaction (HTL) products from the spent mushroom substrate (SMS) of Agaricus bisporus (Lange) Imbach and Pleurotus ostreatus (jacq.) P. kumm. using high-resolution 1H nuclear magnetic resonance (NMR), and assess the antifungal properties of these thermal decomposition liquids against wood decaying fungi (Coniopho...
A Barbero-López, Y M López-Gómez, J Carrasco, N Jokinen, R Lappalainen, A Haapala