Your search resulted in 87 documents. Displaying 25 entries per page.
Development on Damage Functions of Wood Decay for Building Envelope Design
2005 - IRG/WP 05-10556
For the hygrothermal analyses of building envelope systems for insulation design, we tried a natural decay test of wetted wood specimens without any inoculation of fungi. Three principal experimental types: under steady-state conditions (Experiment A), at a cyclic water dripping under Non-steady conditions (Experiment B) and at a cyclic water dipping under-steady conditions (Experiment C), were ca...
H Suzuki, Y Kitadani, K Suzuki, A Iwamae, H Nagai
Canadian code of good practices - Recommendations for design and operation of wood preservation facilities
1990 - IRG/WP 3582
The rationale and procedures for the development of a set of recommendations for design and operation of wood preservation facilities in Canada are discussed. Multi stake holders involvement in problem identification, problem assessment, state of the art knowledge database, implementation and periodic assessment procedures are important considerations for the successful development of a Code of Go...
V N P Mathur, G Das
Results of survey conducted at Orlando to solicit attendee feedback on program design
1994 - IRG/WP 94-60026
J N R Ruddick
Questionnaire on the state of pollution control in the field of wood preservation
1974 - IRG/WP 52
H Willeitner
Determination of physical properties of wood by Novel Guide
2006 - IRG/WP 06-40345
In empirical and theoretical determination of physical properties of wood, a schematic guide has been developed (as a novel guide) for the purpose of bringing facilities to researchers with a processing quantity in terms of data compilation. In this article physical properties of wood have been briefly described in respect to their effect on impregnation process, and technical information has been...
I Usta, M D Hale
Flow charts for termite and decay tests to determine the natural durability of Japanese cedar (Cryptomeria japonica D. Don)
2008 - IRG/WP 08-20385
This paper deals with the experimental flow charts that were used for determination the effects of fungal decay and termite attack on Sugi heartwood during the course of the study of “Comparative studies of natural durability of Japanese cedar (Cryptomeria japonica D. Don) among the geographic cultivate”, which was carried out by Usta et al (2006)....
I Usta, S Doi
Ability of chitosans to limit wood decay under laboratory conditions.
2004 - IRG/WP 04-30339
Chitosans have recently been explored for controlling a number of plant pathogenic fungi and have shown some promise for controlling stain fungi on wood. The potential for using chitosans either alone or in combination with copper sulfate to protect wood from fungal decay was explored using maple veneers. Chitosan treatment reduce weight losses caused by two brown rot and one white rot fungi, howe...
M Maoz, J J Morrell
Unsuitability of the limiting dose as a criterion for assessing the toxicity of preservatives to wood-destroying fungi
1974 - IRG/WP 243
In the majority of methods for investigating preservatives for wood-destroying fungi their toxicity is assessed by determining what is called the "limiting dose". This normally denotes a range of preservative solution concentrations or retentions of dry preservative in the timber, the lower value serving to indicate the amount of preservative at which is observed the expected effect, e.g. the grow...
D A Belenkov
Studies on the preservative treatment of round bamboos by a new technique
1989 - IRG/WP 3536
Nature has offered a versatile and cheap material bamboo, which is generally found to grow principally in forest areas from sea level to about 400 m wherever suitable combination of ecological factors prevail. This potential renewable natural resource has been since times immemorial, exploited by mankind for a variety of purposes specially in developing countries like Asia, Africa and South Americ...
V R Sonti, S Sonti, B Chatterjee
Contribution to the knowledge of wood-rotting fungi in Brazil. Part 1: Occurrence and distribution of fungi on different substrates from the Manaus region, Amazonas State
1995 - IRG/WP 95-10096
A total of 945 spezimens of fungi were studied with regard to their distribution on ditterent substrates, abundances and economic importance. The samples came from the collection ot the Wood Pathology Laboratory of CPPF/INPA in Manaus, Brazil. Altogether, 163 spezies and 87 genera were identified. The following genera Trametes, Auricularia, Panus, Rigidoporus and Hymenochaete were represently by m...
M Aparecida de Jesus
Premature failure of treated timber in wharfs in Papua New Guinea, attributed to defects in design
1991 - IRG/WP 4158
The performance of timber in wharfs in Papua New Guinea has been monitored for a number of years. Premature failure of wharf structures was found in many cases to be due to defects in design rather than ineffective preservative treatment. Above-water timbers were found to be prone to severe checking followed by decay. Protection for the end grain of pile tops and the limiting of radial checking in...
S M Cragg
Design of Field Trials for Evaluation of Antisapstain Products
2003 - IRG/WP 03-20263
Field trialing is an important phase of antisapstain product development and careful planning is required to ensure trial validity for predicting performance in the industrial situation.
Experiences of trialing antisapstain products on lumber over a ten-year period are discussed in this paper.
It is not mandatory to source "fresh " wood for trialing and useful information can be generated even...
F W Frazer, N R Edmonds, B J Nairn
Giftwirkung einiger organischer Zinn-Verbindungen auf Eilarven von Hylotrupes bajulus (L.). [Toxic efficacy of some organic tin compounds against egg larvae of Hylotrupes bajulus (L.)]
1978 - IRG/WP 2120
The toxic values of 12 organic tin compounds towards newly hatched larvae of Hylotrupes bajulus were determined after 4- and 12-week test periods in comparison with bis-tri-n-butyltin oxide (TBTO). Tri-n-butyltin benzoate as well as the 2-, 3- and 4-methyl benzoate of tributyltin oxide were equally effective as TBTO and the latter two were somewhat more effective after a 12-week test period. Almos...
G Becker
Field test design for service life prediction of wooden components
2005 - IRG/WP 05-20308
Wood is predominantly degraded by organisms. Thus, compared to other building materials, service life of wooden material is influenced by many more factors, which are divided into direct and indirect factors. Climate, geographical position, and construction criteria count to the indirect decay factors.
Besides material inherent properties (natural durability, wood preservatives), wood temperature...
A O Rapp, C Brischke
Semi-Solid State Bioremediation of CCA-Treated Wood Using Malted Barley as a Nutrient Source
2002 - IRG/WP 02-50184
Bioremediation processes for recovery and reuse of CCA-treated wood invariably increase the cost of any secondary products manufactured from the remediated fiber. Microbial remediation using either bacteria or fungi has been shown to remove heavy metals from CCA-treated southern yellow pine (SYP). In a two-step remediation process utilizing oxalic acid extraction and the metal-tolerant bacterium...
C A Clausen
Chitosan for wood protection - state of the art
2005 - IRG/WP 05-30378
The aim of this paper was to give a state of the art description of chitosan as a wood protecting agent. Chitosan is a metal free natural compound derived from crustacean shells and is under evaluation as an environmentally benign wood protecting agent. Information from journals states that chitosan may act both fungistatically and at higher concentrations, as fungitoxic, but the mode of action is...
M Eikenes, G Alfredsen, E Larnøy, H Militz, B Kreber, C Chittenden
Recent development in North American industrial wood preservation plants
1988 - IRG/WP 3467
After remaining static for many years there have been a number of changes in plant design and treating cycles in recent years. This has been particularly true in the USA where few restrictions are placed on plant treating cycles by specifications; since only results type specifications are used. It is also important to realize that the AWPA Specifications for Southern Yellow Pine only call for tre...
J F Bridges
Influence of variable lignin content amongst hardwoods on soft-rot susceptibility and performance of CCA preservative
1982 - IRG/WP 1151
This paper presents the outline of an argument, based on both new and established data, which relates varying lignin content to variation of soft-rot susceptibility between hardwood species and of performance of CCA preservatives in controlling soft-rot. Although more data need to be generated to prove this relationship, sufficient evidence exists for the hypothesis to be given close attention, pa...
J A Butcher, T Nilsson
Electricity pole treatments - Wedding Bells State Forest. Inspection September 1983
1985 - IRG/WP 3334
A survey to study the extent of soft rot in hardwood poles in N.S.W. was commenced in 1975. The results of the survey, published in 1982, indicated that a number of factors contributed towards soft rot attack on poles in service. A detailed rest on pole treatments and maintenance procedures was established in 1976, at a site in Wedding Bells State Forest near Coffs Harbour. The site selected was k...
R S Johnstone, R H Eldridge
Design of a laboratory method for evaluating the effectiveness of soft rot preservatives
1988 - IRG/WP 2312
This purpose of this work was to design a method which makes it possible to evaluate the effectiveness of products which present protect wood against soft rot, using new products·of a different nature, on wood of·Pinus sylvestris L. and Fagus sylvatica L., and which, suitably applied, avoid big economic losses deriving from lack of knowledge of the active principles suitable to present protect w...
M T De Troya, A M Navarrete
Preliminary evaluation of the answers to the 2nd IRG/WP-questionnaire on the state of pollution control in the field of wood preservation
1982 - IRG/WP 3209
This preliminary evaluation of the answers to the 2nd IRG/WP-Questionnaire only gives a general survey on those questionnaires which the author received until April 30th, 1982. Details, such as correlations between importance of wood preservation and pollution control, as well as a comparison of the answers with those to the first questionnaire (Doc. IRG/WP/369), could not be considered due to lac...
H Willeitner
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
Sterilization to limit pretreatment decay: Internal temperature during kiln drying of Douglas-fir poles
2001 - IRG/WP 01-40206
Sterilization to limit pretreatment decay: Internal temperature during kiln drying of Douglas-fir poles. Fungal colonization of poles following peeling has been the subject of considerable concern among electric utilities. While the presence of fungi does not, in itself constitute a risk, the survival of these fungi through the conventional treating processes could allow them to continue to degrad...
J J Morrell, P G Forsyth, K L Levien
Co-operative tests concerning influence of solvent and drying method on the toxic limit of wood preservatives against Basidiomycetes. Preliminary report
1971 - IRG/WP 204
In the Working Group II of the Organization for Economic Co-operation and Development working group on wood preservation (now International Research Group on wood preservation) it was agreed that more knowledge was necessary concerning the influence of the solvent on the toxic limit of organic solvent types of wood preservatives against Basidiomycetes. A test program was drawn up and after discuss...
T Hof
Wood preservatives. The state of French legislation (June 1977)
1977 - IRG/WP 3106
There does not exist any special legislation for preservatives but general laws may intervene at three levels:-Manufacture -Transport -Selling. In every case, it is based on a poisonous substances classification, an official classification provided by a para-governmental organisation which includes toxicologists. This legislation may refer to other texts: categories of danger for transport (the Eu...
M Romeis, P Guéneau