Your search resulted in 280 documents. Displaying 25 entries per page.
Role of wood preservation in bioconservation and protection of environment
1997 - IRG/WP 97-50082
In order to meet a revolutionary task of bioconservation and protection of environment through preservation of less important and nondurable timbers from tropical zones, 170 timber species from Bangladesh were screened. Air-dried (12% MC) 170 different species of timbers, full cell pressure impregnated with 5% CCB solution revealed satisfactory treatability of all timbers for long-term indoor uses...
A K Lahiry
Need to develop processing technologies (for value addition) of the species evaluated for their properties and uses
2005 - IRG/WP 05-40307
The demand of timber in India for different industrial as well as domestic applications is ever increasing mostly due to urbanization and industrialization. This demand can only be met either from the imported timber or from the plantation resources outside the reserved and natural forests. There are a number of timber species grown under plantation forestry have their heartwood refractory to any ...
S R Shukla, S K Sharma, Y M Dubey, P Kumar, R V Rao, K S Shashidhar
Termite resistance of Malaysian and exotic woods with plantation potential: Field evaluation
1998 - IRG/WP 98-10289
An in-ground resistance of selected Malaysian and exotic timbers to attack by a representative aggressive subterranean Coptotermes termite was evaluated as part of an on-going collaborative research between the Forest Research Institute of Malaysia and the University of Hawaii on termite control of building timbers under humid tropical conditions. A test site at FRIM, highly susceptible to the sub...
A H H Wong, J K Grace, L H Kirton
Destruction of two tropical timbers by marine borers and micro-organisms in Goa waters (India)
1992 - IRG/WP 92-4176
The paper deals with the pattern of microbial attack in relation to marine borer damage of test panels of African rosewood and Brazilian jackwood exposed in Goa waters (Western India) for a period of seven months. The degradation of wood cell walls in both the timber samples occurred due to infestation of soft-rot fungi and tunnelling bacteria. African rosewood, which was severely damaged by tered...
L N Santhakumaran, A P Singh
Performance of Two Imidacloprid-Treated Malaysian Hardwoods in an Accelerated Aboveground Termite Test
2005 - IRG/WP 05-30389
The performance of the chloronicotinyl insecticide imidacloprid as a wood protecting termiticide, under a simulated Malaysian biological hazard class H2 (exposure aboveground indoors against termites and wood borers), was evaluated by a novel termite field test protocol. Replicate end-grain sealed air dried test blocks (20 x 20 x 20 mm) of two Malaysian hardwoods, Kembang Semangkok (Scaphium spp.)...
A H H Wong
Study of the degradation caused by micro-organisms in Pinus sp. waterlogged wood
1989 - IRG/WP 1411
So far, the different Centers are trying the restoration and the conservation of wood structures, coming from subaquatic archeological deposits, with interest from the historic - artistic point of view. The main objective of this paper has been the determination of the decay level of Pinus sp. wood coming from a roman ship (approximately 2000 years old), where we have analyzed their physical prope...
M T De Troya, M C Escorial, J Garcia, A Cabanas
Standardization of preservative treated timber species for conductor, insulator and transformer packing of REB
1996 - IRG/WP 96-40071
In order to resolve the post landing failure problem of wooden packing for conductor, insulator, transformer of REB, the names of the suitable timber species from different parts of the world, irrespective of countries of origin have been standardized along with their strength and treatability grades. The CCA treatability of some Pakistani timber species have been presented for example which was t...
A K Lahiry
Preservative treatment of common timbers and bamboos of Bangladesh for rural electrification infrastructure
1998 - IRG/WP 98-40104
Researches revealed new treatment grades, treatment groups, grading groups, natural durability grades, strength groups and a new preservative combination for remedial treatment and sterilization of most common timbers and bamboos of Bangladesh. The obtained findings are applicable for equivalent timber species having equivalent climatic condition. Sapwoods are always perishable and timbers with wh...
A K Lahiry
Termite physical barriers: Update on retrofitting Granitgard around 'mock up' buildings after four years
1996 - IRG/WP 96-10140
This field experiment was installed four years ago (March 1992) to evaluate the effectiveness of graded crushed granite stone, commercially marketed under the name, Granitgard, as a physical termite barrier when retrofitted around 'mock-up' buildings. The field site is located at Walpeup in the semi-arid mallee region of north-west Victoria (360 km from Melbourne), and there are ...
B M Ahmed, J R J French
Observations on the destruction of fishing craft in India by marine wood-borers with special reference to the West Coast
1981 - IRG/WP 468
The paper highlights the economic importance of the destruction of fishing craft in India by marine wood-destroying agencies. The annual loss involved is to the extent of over 94 million rupees. Thirty-nine spectes and one variety of woodborer have so far been recorded from India, of which Bankia campanellata, Bankia carinata, Bankia rochi, Dicyathifer manni, Lyrodus pedicellatus, Teredo clappi, T...
L N Santhakumaran, J C Jain
Investigations of the treatability of various commercially significant Turkish timbers
1976 - IRG/WP 370 E
Timbers which naturally deteriorate quickly can only be used commercially when their life is increased by the use of chemical treatments. The treatment of the timber can only be planned on a regular basis when the treatability of the wood is known. The purpose of the experiments was therefore to determine to what extent the various types of wood could be sufficiently impregnated. The question of t...
R Ilhan
Tunnelling bacteria
1983 - IRG/WP 1186
The micromorphology of decay in wood caused by a certain group of single-cell bacteria, called tunnelling bacteria (TB), is described. TB are characterised by their tunnelling ability within the secondary cell walls of wood fibres. Pure cultures of TB have not yet been obtained although the typical decay patterns can be reproduced using mixed bacterial cultures. Some indications of lignin degradin...
T Nilsson, G F Daniel
Changes in fat and moisture contents, and nitrogen fixation in laboratory maintained termites
1984 - IRG/WP 1242
Orphaned groups of termites of Coptotermes acinaciformis and Mastotermes darwiniensis were maintained in the laboratory for several months on two dietary regimes, and changes in their fat contents, moisture contents and nitrogen fixation rates were examined. There were no significant feed or feed time effects for either species. For Coptotermes acinaciformis, there was a highly significant time ef...
J R J French, P J Robinson, L G Turner, P J Pahl
The need for realism in wood preservation research. A key address
1983 - IRG/WP 3254
The approval of a chemical for use as a timber preservative and the design of in service retention requirements represents an act linking fundamental research and commercial timber preservation. How difficult is it to translate figures generated through controlled experimentation into working specifications and how confident can we be in the methods used to provide such figures? The chairman of Wo...
L E Leightley
An observation of seasoning, preservative treatment and storing of CCA treated 30 bangladeshi hardwood species for crossarms
1995 - IRG/WP 95-40058
Observed kiln seasoning, preservative pressure treatment and storing of CCA treated 30 Bangladeshi hardwood species for crossarms. It revealed that it was very difficult to kiln season and preservative pressure treatment of thirty species together in a single charge and found that when species of different specific gravity kiln season together there occur some objectionable seasoning degrades, and...
G N M Ilias, M D Rokib-ul-Hafiz
Efficacy of fumigants in the eradication of decay fungi implanted in southern pine timbers
1986 - IRG/WP 3365
Southern pine timbers (15.2 cm x 15.2 cm x 4.26 m) were fumigated at midlength to evaluate the effectiveness of the fumigants chloropicrin, Vapam, Diazomet, Busan 40, Vanicide 51, Vanicide TH, sodium bisulfite, and ethanolamine in eradication of decay fungi. The fumigants were introduced into 2.54 cm holes which were closed immediately with rubber stoppers. Movement and persistence of lethal conce...
T L Highley, W E Eslyn
International collaborative laboratory comparison of two wood preservatives against subterranean termites: Second update
1995 - IRG/WP 95-10117
As was agreed by members at the termite workshop at the 24th annual meeting of IRG in Orlando, USA, in May 1993 to initiate an international subterranean termite laboratory bioassay to compare the various preferred termite protocols used by IRG termitologists was initiated. The author was nominated to co-ordinate this comparative laboratory evaluation of two wood preservatives (CCA and Cu-naphthen...
J R J French
Termite resistance of twenty-eight Indonesian timbers
1982 - IRG/WP 1150
A comparative study of termite resistance of 28 Indonesian wood species has been conducted using small samples measuring 5 x 10 x 20 mm³. The drywood termite Cryptotermes cynocephallus (Kalotermitidae) and the subterranean termite Coptotermes curvignathus (Rhinotermitidae) were used in the study. A resistance classification was derived on the basis of cluster analysis. The result reveals that Alb...
Nana Supriana, P E Howse
Assessment of untreated Papua New Guinea timbers against subterranean termites. Progress report 2
1993 - IRG/WP 93-10040
Eight species of Papua New Guinea wood including Kwila (Intsia palembanica), Taun (Pometia pinnata), Malas (Homalium foetidum), PNG Walnut (Dracontomelon dao), Calophyllum (Calophyllum sp.), Kamarere (Eucalyptus deglupta), PNG Beech (Nothofagus spp.) and White Cheesewood (Alstonia scholaris) were exposed groun contact for their natural durability against subterranean termites. Inspection after 42 ...
M Rokova, H C Konabe
BG- an easiest preservative paste and its effective diffusibility in timbers for indoors and outdoors uses
2001 - IRG/WP 01-30253
After application of a newly formulated paste "BG-1" on all surfaces of air-dried lumbers, the boron have been found diffused completely in permeable and impermeable hardwoods at the rate of 12 mm radial thickness per week. The new paste may be a solution to protect lumbers being used or to be used under cover where timber is susceptible to termite and borer attack. The new cost effective paste wa...
A K Lahiry
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
Improvement in dimensional stability against water of the main Spanish timbers impregnated with water repellent organic protectors
1988 - IRG/WP 3468
The study reported the increase of dimensional stability against water of the main Spanish timbers, both broadleaved and coniferous, after impregnation in the autoclave with organic protector, with contains 33.3% water repellent waxes and resins. The proposed Spanish standard, U.N.E. n° 56541 is used, where dimensional stability of the impregnated wood is expressed as a% of that of the non-impreg...
J A Rodríguez Barreal
Standard principles of testing termiticides: A discussion paper
1991 - IRG/WP 1502
Recent restrictions and banning of termiticides such as organochlorines in some countries has focussed attention on the need for new and novel compounds as termiticides. However, this poses problems for both wood preservative manufacturers and termitologists. Test procedures have to be devised to evaluate the new termiticides so that the tests are practical, encourage vigorous termite activity, an...
J R J French
Natural resistance of twenty-five timber species to marine borer attack in Goa waters (India)
1992 - IRG/WP 92-4178
Natural durability of 25 species of Indian timbers has been discussed, based on data collected from test panels exposed in Goa waters (west coast of India. for a period of 7 months. All the timber species, except Cleistanthus collinus, were heavily destroyed within 7 months on account of the combined attack by Martesia striata (Linnaeus) and Lyrodus pedicellatus (Quatrefages). Cleistanthus collinu...
L N Santhakumaran, G Srimannarayana, K Nagaiah
Ultrastructure of Prumnopitys ferruginea wood from a buried forest in New Zealand
1991 - IRG/WP 1489
The buried wood of Prumnopitys ferruginea, a New Zealand native tree, was examined by scanning and transmission electron microscopy to investigate the extent to which the wood had deteriorated and the cause of its deterioration. Examinations showed that some deterioration of wood had occurred. Microscopy revealed a decay pattern similar to that produced by cavitation bacteria. Lenticular cavities ...
A P Singh, T Nilsson, G F Daniel