Your search resulted in 3278 documents. Displaying 25 entries per page.
Growth of sapstain fungi in scots pine and the effect of timber ageing
1998 - IRG/WP 98-10269
A trial was initiated to study the growth of known isolates of sapstain fungi in scots pine (Pinus sylvestris) which had been naturally aged or sterilised by autoclaving or irradiation. Sawlogs cut from commercial thinnings were reduced to billet size and the exposed ends were painted with a bituminous sealant to reduce moisture loss. Some billets were inoculated after autoclaving or gamma-irradia...
N J Strong, J F Webber, R A Eaton
Ponding of radiata pine (Pinus radiata) - 2. The effect of ponding on coating penetration into wood
1998 - IRG/WP 98-10249
Radiata pine (Pinus radiata) wood panels which had been ponded for periods ranging from 2 to 12 weeks, dried and subsequently coated with a primer and examined by light microscopy after staining sections with Sudan IV to enhance the contrast of the primer material.
A correlation between the extent of ponding and the extent of coating penetration into wood was observed. The coating penetration var...
A P Singh, S S Gallagher, U Schmitt, B S Dawson, Yoon Soo Kim
Effect of humidity fluctuations on mould growth on pine wood
1989 - IRG/WP 1412
Most studies on mould development on wood material have been made at constant moisture conditions during the experimental period. As a consequence of such studies, a maximum permittable humidity level to avoid mould problems in wood constructions has been recommended. In the practical situation, the constructions are seldom subject to constant humidity or temperature. In the present paper, we repo...
J Bjurman
Pretreatment decay in air-seasoning Scots and Corsican pine poles in England
1989 - IRG/WP 1390
British grown Scots and Corsican pine poles were sampled for colonization by basidiomycetes after air-seasoning for 6 to 9, or 16 to 20 months. The amount of infection present in these poles was compared with that in poles which were imported from Finland. After 6 to 9 months seasoning, the British grown pine poles were heavily infected with Peniophora gigantea, Cylindrobasidium evolvens, Stereum ...
A R Zahora, D J Dickinson
The effect of of sorbitol on the decay of boric acid treated Scots pine
1991 - IRG/WP 1509
The tetra-hydroxy borate ion is known to undergo complexation with polyols of biological importance and probably protects treated timber by this action. The inhibitory effect of boric acid upon fungal growth and dehydrogenases has been shown to be prevented by the addition of certain polyols. This work was extended, with a study of the effects of a polyol on the performance of boric acid in treate...
J D Lloyd, D J Dickinson, R J Murphy
Solid state NMR study on pine wood degraded by brown rot fungus Gloeophyllum trabeum
1994 - IRG/WP 94-10067
Blocks of Pinus koraiensis wood were degraded by Gloeophyllum trabeum and examined by solid-state 13C NMR spectroscopy. Chemical compositions were estimated from relative signal aras. There was no evidence for preferential degradation of the noncrystalline cellulose which accounted for about 4% by weight of the wood. Loss of partly ordered cellulose on crystal surfaces exceeded the loss of crystal...
Yoon Soo Kim, R Newman
Oxidation of wood components during CCA-C fixation
1993 - IRG/WP 93-30024
Pre-extracted radial sections of southern yellow pine sapwood were treated with CCA-C and analyzed by X-ray photoelectron spectroscopy (XPS). The ratio of C1 (carbon bonded to carbon and/or hydrogen) to C2 (carbon bonded to one oxygen) in XPS Cls spectra was taken as a measure of the progress of oxidation of wood components during CCA fixation. This ratio was 0.82 before CCA treatment and increase...
M Kaldas, P A Cooper
Estimation of the impregnation degree of pine wood by the distribution analysis of active ions concentration in the cross-section
1999 - IRG/WP 99-20174
Samples in the form of pine wood rollers of diversified moisture content of ca. 50, 28 and 12% were impregnated with a water solution of the mixture type CCB with the use of the full-cell process. Moisture content was determined in individual layers from the girth to the pith. In the same way the concentrations of copper and chromium ions with the use of the spectrophotometric method and recalcula...
K Lutomski, B Mazela
Fouling assemblage development on copper-chromium-arsenic-treated timber submerged in European waters
2002 - IRG/WP 02-50181
The effect of the anti-marine-borer timber preservative CCA on community development of non-target marine fouling animals was investigated. Panels of Scots pine treated to target retentions of 12, 24 and 48 kg CCA per m3 of wood, plus untreated controls were submerged at seven coastal sites (Portsmouth, UK; La Tremblade (2 sites), France; Ria Formosa, Portugal; Sagres, Portugal; Kristineberg, Swed...
C Brown, R J Eaton, S M Cragg, P Goulletquer, A Nicolaidou, M J Bebianno, J Icely, G F Daniel, T Nilsson, A J Pitman, G Sawyer
Effect of compression wood on leaching of chromium, copper, and arsenic from CCA-C treated red pine (Pinus resinosa Ait.)
2000 - IRG/WP 00-30232
In this study, the effect of compression wood formation on the release rate of chromium, copper, and arsenic elements from red pine (Pinus resinosa Ait) was investigated. Wood blocks from red pine containing compression and normal wood portions were treated with a 1.0% CCA-C solution and were then allowed to fix at 23 ± ??2°C (74 ± 4°F) for 0, 6, 24, 48, 96, 192, and 336 hours. After each fixa...
S N Kartal, S T Lebow
Effect of Pseudomonas cepacia on the activity of a mixture of wood staining fungi on ponderosa pine sapwood
1995 - IRG/WP 95-10107
There are major incentives for limiting the degree of fungal discoloration which occurs during wood processing. Most lumber producers apply prophylactic fungicides which limit microbial growth, but increasing restrictions on the use of these chemicals have encouraged the search for alternative stain prevention strategies. Among the possible strategies for stain prevention is biological control. Wh...
J J Morrell, R K Velicheti
Microdistribution of Copper in Copper-Ethanolamine (Cu-EA) Treated Southern Yellow Pine (Pinus spp.) related to density distribution
2004 - IRG/WP 04-40270
The relationship between copper absorption and density distribution in wood cell walls was investigated in this study. The density distribution on layer level was obtained from two approaches: (1) calculation by using data obtained from literature; (2) microdistribution of carbon and oxygen atoms in the wood cell. The microdistribution of carbon and oxygen in untreated southern yellow pine (Pinus ...
Jinzhen Cao, D P Kamdem, E Pasek
Imaging fungal deterioration of wood using x-ray microtomography
1997 - IRG/WP 97-10240
Nondestructive tomographic images of solid Southern yellow pine (SYP) wood and SYP during deterioration by wood decay fungi were obtained by using a new class of synchrotron X-ray computed microtomography (CMT). The CMT images will provide information about spatial relationship between degrading fungi and wood structures. Wood samples were scanned with synchrotron-generated X-rays at high resoluti...
B Illman, B A Dowd
Minimum inhibitory concentration of methylene bisthiocyanate towards selected wood inhabiting fungi in liquid culture and on radiata pine
2001 - IRG/WP 01-30261
The objective of the current study was to determine the minimum inhibitory concentration (MIC) of methylene bisthiocyanate (MBT) towards wood inhabiting fungi common on unseasoned radiata pine (Pinus radiata D. Don). The fungi used were Ophiostoma floccosum, Leptographium procerum, Sphaeropsis sapinea and Trichoderma viride. Fungi were individually inoculated into nutrient media spiked with differ...
T Singh, B Kreber, C Chittenden, R N Wakeling, A Stewart
A comparison of the leaching resistance of copper 2-ethanolamine and copper ethylenediamine treated Scots pine
2000 - IRG/WP 00-30233
The depletion of copper from copper 2-ethanolamine and copper ethylenediamine treated Scots pine blocks was investigated. A greater leaching resistance was found for copper 2-ethanolamine, which retained ca. 86% and ca. 50% copper after water and buffer leaching, respectively. Leached amine treated blocks also contained significant residual amine. This was consistent with other observations linked...
Xiao Jiang, J N R Ruddick
Antagonistic properties of Gliocladium virens against wood attacking fungi
1996 - IRG/WP 96-10162
Gliocladium virens has shown good antagonism against decay fungi in agar medium and in wood blocks. Gliotoxin produced by Gliocladium virens is associated with biocontrol of some plant diseases, but its importance to biocontrol of wood-attacking fungi is unknown. We investigated the ability of gliotoxin-producing (GLT+) isolates of Gliocladium virens and gliotoxin-deficient (GLT-) mutants of Glioc...
T L Highley, H S Ananthapadmanabha, C R Howell
Evaluation of white-rot fungal growth on Southern Yellow pine wood chips pretreated with blue-stain fungi
2000 - IRG/WP 00-10349
White-rotting basidiomycetes do not colonize on southern yellow pine. This study seeks to reduce the resinous extractive content of southern yellow pine by treating it with blue stain fungi. The mycelial growth of wood-inhabiting ligninolytic white-rot fungi can be achieved on pretreated southern yellow pine wood. Aureobasidium, Ceratocystis, and Ophiostoma spp. removed 70% to 100% of the extracti...
S C Croan
Preliminary observations on tributyltin treated Scots pine sapwood using 119Sn (Mössbauer and NMR) spectroscopic techniques
1984 - IRG/WP 3312
119mSn Mössbauer data are presented for bis(tributyltin) oxide, tributyltin ethanesulphonate, bis(tributyltin) carbonate and tris(tributyltin) phosphate, both in the pure form and in Scots pine sapwood. The structures proposed for these compounds, in the solid state, are supported by 119Sn nuclear magnetic resonance spectroscopy.
R Hill
After 18 years, preservative dipping and brush treating continue to provide protection to shingles of western wood species
1997 - IRG/WP 97-30156
The presence of residual preservation in dip-treated and brush-treated shingles of various species from the western United States was assessed 18 years after installation using Aspergillus bioassays. The performance of western redcedar (Thuja plicata) was compared to western hemlock (Tsuga heterophylla), sugar pine (Pinus lambertiana) and western larch (Larix occidentalis). Untreated shingles of a...
T C Scheffer, D J Miller, J J Morrell
Biological control of internal decay in Scots pine poles: A seven year experiment
1992 - IRG/WP 92-1529
The interactions between key fungi were monitored, by non-destructive and destructive sampling methods, during the course of an experiment on the effectiveness of Scytalidium sp. and Trichoderma spp. for eliminating established infections of Lentinus lepideus (Fr. ex Fr.) Fr. in creosoted Pinus sylvestris poles. Although extensively isolated at the beginning and end of the experiment, Trichoderma ...
P I Morris, D J Dickinson, B Calver
FTIR characterization of copper ethanolamine - wood interaction
1999 - IRG/WP 99-20154
The interaction of copper ethanolamine (Cu-EA) and wood components was studied by using Fourier transform infrared spectroscopy (FTIR). In Cu-EA treated wood, significant reduction was noticed on the band attributed to carbonyl vibration from carboxylic groups at 1735±5 cm-1 and an increase in band intensity was obtained from carbonyl in carboxylate at 1595±5 cm-1. The same observation was made ...
Jun Zhang, D P Kamdem
The examination of preservative-treated radiata pine using electron spin resonance spectroscopy
1987 - IRG/WP 3423
Electron spin resonance spectroscopy (ESR) may be used to characterise the molecular environment of chemical species containing unpaired electrons. These species include free radicals, bi-radicals, point defects in solids, localised crystal imperfections and many transition metal ions. ESR has previously been applied to the examination of wood weathering or wood pyrolysis and now FRI and Massey Un...
D V Plackett, E W Ainscough, A M Brodie
Amine copper reaction with wood components: acidity versus copper adsorption
1997 - IRG/WP 97-30161
The bonding sites for copper in wood from CCA, as well as ammoniacal/amine based systems, has long been a topic of investigation. Both phenolic and carboxylic functional groups have been discussed as potential bonding sites for copper. However, no consensus on the adsorption mechanism has been realized. Thus, the selective adsorption of copper in southern yellow pine from ethanolamine-copper solut...
S M Thomason, E A Pasek
Le pin: Matériau à contact alimentaire [Pine wood as a material for food contact]
1995 - IRG/WP 95-50040-01
Monoterpenes emitted to air from woods of pine (Pinus nigra, Pinus laricio, Pinus pinaster and Pinus sylvestris) were determined on the one hand by static analysis and by other hand by sampling on the Tenax adsorbent, followed by analysis using thermal desorption, both being combined with gas chromatography coupled with mass spectrometric detection. The major monoterpenes were alpha-pinene and 3-c...
A Waymel, M Lamour, G Labat
Permatek IM 30 as a termiticide treatment for veneer-based wood products
2003 - IRG/WP 03-30325
Permatek IM 30 is a termiticide designed for incorporation into wood products during manufacture.
Whereas existing approved products in Australia are based predominantly on synthetic pyrethroids carried in solvents, Permatek IM 30 is based on imidacloprid, a neonicotinoid insecticide. The formulation has very low mammalian toxicity, is free of VOCs, and has been successfully tested as a glueline ...
J Doyle, K Webb, W R Rae, A F Siraa, J Malcolm-Black