Wood can be chemically modified to reduce the moisture content of the cell wall and increases decay resistance. As the level of bonded chemical increases, the cell wall equilibrium moisture content decreases and the resistance to attack by white-and brown-rot fungi increases. There is a direct…
Keywords: Plant cell walls, wood-decaying fungi, wood moisture, wood chemistry, chemical reactions, biodegradation, wood preservation, deterioration, acetylation, resistance to decay, modified wood, preservation, moisture content, chemical modification of wood, dimensional stability
Source: ECOWOOD 2006 : 2nd International Conference on Environmentally-Compatible Forest Products, Fernando, Pessoa University, Oporto, Portugal, 20-22 September 2006. [S.l. : s.n.], 2006: p. 227-237.
For most markets for wood, it is used without any treatments or modifications. When wood is used in adverse environments, it may be treated with chemicals to help prevent decay, improve water resistance, reduce the effects of ultraviolet radiation or increase fire retardancy. Many of these…
Keywords: Acetic anhydride, acetylation, chemical modification, decay, dimensional stability, equilibrium moisture content, fungal cellar, fungi, plant cell walls, wood-decaying fungi, wood moisture, wood chemistry, biodegradation, deterioration, chemical reactions, wood preservation, acetylated wood, resistance to decay, modified wood, chemical modification of wood, moisture content, preservation
Source: Wood material science and engineering. Vol. 1 (2006): pages 29-33.
Heterobasidion annosum causes root and butt-rot in trees and is the most serious forest pathogen in the northern hemisphere. We developed a rapid and simple Agrobacterium-mediated method of gene delivery into H. annosum to be used in functional studies of candidate genes and for visualization of…
Keywords: Agrobacterium tumefaciens, Heterobasidion annosum, green fluorescent protein (GFP), transformation, genetic markers, mycelium, phytopathogenic fungi, biological control, butt rots, pathogenic fungi, root rots, Basidiomycetes, genetic transformation, resistance to decay, decay fungi
Source: FEMS microbiology letters. Vol. 255 (2006): pages 82-88.
Deterioration is broadly defined as any negative effect on the properties of a material. The effects can be due to biological attack or to various non-living agents (sunlight, moisture, temperature), but often, deterioration results from a combination of factors. Nowhere is this more evident than…
Keywords: Accelerated testing, accelerated life testing, marine borers, insect pests, wood-decaying fungi, composite materials, moisture, deterioration, biodegradation, discoloration, ultraviolet radiation, biodegradation, weathering, wood plastic composites, durability, resistance to decay, wood-plastic materials
Source: Wood design focus. Vol. 16, no. 3 (fall 2006): pages 7-10.
This study evaluated the relative ability of three types of wood preservatives to inhibit attack by Formosan subterranean termites (FST) (Coptotermes formosanus Shiraki) and native subterranean termites (Reticulitermes spp.). The study also evaluated the roles of preservative retention and…
Keywords: Borates, CCA, Formosan subterranean termites, Louisiana, native subterranean termites, penetration, retention, shell treatment, SPF, pine, spruce, fir, biodegradation, deterioration, wood preservatives, termites, Reticulitermes flavipes, DOT, sodium tetraborate decahydrate, disodium octaborate tetrahydrate, chromated copper arsenate, CCA, copper borates, termite control, resistance to decay, Coptotermes formosanus, treated wood
Source: Wood and fiber science. Vol. 38, no. 4 (2006): pages 609-620.
In 1993, unseasoned pine posts were treated with groundline remedial treatment containing 3.1% copper hydroxide and 40% sodium tetraborate decahydrate (borax). The soundness of the posts was periodically evaluated using a push test. After 3.5, 6.5, and 10 years, sections were taken from two posts…
Keywords: Wood poles, preservation, electric lines, borax, wood preservatives, wood-decaying fungi, pine, decay, posts, preservatives, copper hydroxide, resistance to decay, durability, groundline
Source: Proceedings, one hundred first annual meeting of the American Wood-Preservers' Association ... New Orleans, Louisiana, May 15-17, 2005; volume 101. Birmingham, Ala. : American Wood Preservers' Association, 2005: pages 94-102.
Wood preservatives extend the useful service life of all wooden commodities used above ground and in ground contact, Over SO years ago, the USDA-Forest Products Lab established tests in a high decay and high termite hazard zone in southern Mississippi. During the last five decades, periodic reports…
Keywords: Preservatives, posts, efficacy, performance, life span, southern pines, wood preservatives, wood poles, preservation, decay, southern yellow pine, resistance to decay, durability, service tests
Source: Proceedings, one hundred first annual meeting of the American Wood-Preservers' Association ... New Orleans, Louisiana, May 15-17, 2005, volume 101. Birmingham, Ala. : American Wood Preservers' Association, 2005: pages 136-143.
The fungal resistance of high density polyethylene filled with 50% wood flour was investigated using laboratory soil block tests. Modifications to standard test methods were made to increase initial moisture content, increase exposure surface area, and track moisture content, mechanical properties…
Keywords: Plastic-impregnated wood, absorption, adsorption, wood, mechanical properties, wood-decaying fungi, biodegradation, polyethylene, moisture, wood flour, soil-block testing, weight of wood, surface area, Trametes versicolor, decay fungi, wood-plastic materials, resistance to decay, Gloephyllum trabeum
Source: Plastics in building construction. Vol. 27, no. 2 (Feb. 2003): pages 7-14
Reaction of wood with anhydrides, isocyanates, and epoxides reduces the moisture content of the cell wall and increases the resistance of the modified wood to attack by fungi. As the level of bonded chemical increases. the cell wall equilibrium moisture content decreases and the resistance to…
Keywords: Chemical modification, reaction systems, moisture content, decay resistance, plant cell walls, wood-decaying fungi, anhidrides, epoxy compounds, isocyanates, wood preservation, resistance to decay, modified wood, moisture content, preservation, chemical modification of wood
Source: Drewno. Vol. 48, no. 173 (2005): pages -117.
Eleven strains of T. palustris were evaluated for mass loss and production of phosphate buffer soluble oxalic acid on pine wood blocks treated with 0.5% N’,N-naphthaloylhydroxamine (NHA) in a soil-block test. After 12 weeks higher percentage mass loss was observed in control groups for 10 strains,…
Keywords: Oxalic acid, biocides, fungicides, wood preservatives, wood deterioration, wood biodegradation, wood-decaying fungi, brown rot, colorimetry, NHA, resistance to decay, preservatives, fungicidal properties, decay fungi, soil block testing, Tyromyces palustris, Gloeophyllum trabeum, southern yellow pine, preservation, mass loss rate
Source: International biodeterioration & biodegradation. Vol. 63, no. 1 (Jan. 2009): pages 46-51.