Wood Preservatives
Mostrando 1-12 de 16 artigos, teses e dissertações.
-
1. CHEMICALLY TREATED GLUED LAMINATED PARICÁ TIMBER (Schizolobium parahyba var. amazonicum)
ABSTRACT In the production of glue-laminated timber (GLT), boards derived from planted forest wood with easy workability are glued on top of one another. The main objective of the present work was to evaluate the performance of paricá timber GLT beams (5 × 10 cm) on GLT. Three procedures were performed: (1) GLT beams (5 × 10 cm) were produced using natura
Eng. Agríc.. Publicado em: 25/04/2019
-
2. Tannic extract potential as natural wood preservative of Acacia mearnsii
ABSTRACT High toxicity of the preservatives most frequently used in wood treatment and the resulting risks of handling pose a threat to small producers and to the environment. In an attempt to mitigate these problems, the present study was conducted with the objective of evaluating the preservative effect of tannic extract on biodeterioration of Acacia mearn
An. Acad. Bras. Ciênc.. Publicado em: 07/12/2017
-
3. Relationship between density and anatomical structure of different species of Eucalyptus and identification of preservatives
The species and density of Eucalyptus wood poles installed in the electrical network are useful parameters which must be considered when it is necessary to establish the service life of these structures. In this work, eucalyptus poles samples were collected and analyzed by scanning electron microscopy and energy dispersive spectroscopy (SEM/EDS). SEM image a
Mat. Res.. Publicado em: 10/09/2013
-
4. Classificação de resíduos de madeira tratada com preservativos à base de arseniato de cobre cromatado e de boro/flúor
Classification of waste wood treated with chromated copper arsenate (CCA) and boron/fluorine preservatives, according to NBR 10004, was investigated. The leaching test (ABNT NBR 10005) for As and Cr, and solubilization test (ABNT NBR 10006) for F, were applied to out-of-service wooden poles. Concentrations of As and Cr in leachates were determined by ICP-MS
Quím. Nova. Publicado em: 2012
-
5. Permeability measuremens of brazilian Eucalyptus
The permeability of Brazilian Eucalyptus grandis and Eucalyptus citriodora wood was measured in a custom build gas analysis chamber in order to determine which species could be successfully treated with preservatives. Liquid permeability was tested using an emulsion of Neen oil and a control of distillated water. Air was used to test the gas phase permeabili
Materials Research. Publicado em: 2010-09
-
6. Eficiência de inseticidas para preservar madeira contra danos de cupim subterrâneo / Efficiency of insecticides to preserve wood against damages of subterranean termite
A field test was developed to evaluate the efficiency of three insecticides as wood preservatives against damages caused by the subterranean termite Coptotermes havilandi Holmgren, 1911 (Isoptera: Rhinotermitidae). The commercial products with their respective appraised active ingredients were: Dursban 4E chlorpyrifos; Diazinon 60 EC diazinon and Dragnet 384
Publicado em: 2004
-
7. Durability of preservative treated Pinus lumber: evaluation through field stake test. / Durabilidade da madeira do gênero Pinus tratada com preservantes: avaliação em campo de apodrecimento.
When used in ground contact, wood is deteriorated by biological agents, as root fungi and subterranean termites. A way to increase the use of wood species of low natural durability, as the Pinus lumber, is the preservative treatment. However, there is a lack of information indicating the durability of treated wood. In order to determine the durability of pre
Publicado em: 2002
-
8. Fatores que afetam o tratamento para preservação de madeiras
Em preservação de madeiras é essencial que se tenha uma compreensão dos fatores que afetam a tratabilidade da madeira, bem como as características hidrodinâmicas de regime não estacionário que imperem durante o processo. No presente trabalho são abordados alguns aspectos da deterioração biológica da madeira, bem como os métodos adotados para ret
Publicado em: 2000
-
9. Rapid Dye Decolorization Method for Screening Potential Wood Preservatives
We developed a new screening method for potential wood preservatives based on decolorization of the dye Remazol Brilliant Blue R by extracellular oxidative agents produced by wood decay fungi. Oxidative biodegradation of lignin yielded decolorized zones around and under fungal cultures on a dyed agar medium. Inhibitory effects were detected by direct observa
American Society for Microbiology.
-
10. Gliomas and exposure to wood preservatives.
A case-referent study was undertaken to look for occupational risk factors among patients with glioma treated in a neurological hospital in Paris between 1975 and 1984. In the study group were 125 men with gliomas (aged less than or equal to 65) and 238 patients (also less than or equal to 65) admitted for non-neoplastic, non-malformative vascular diseases i
-
11. Biological Factors Influencing the Effectiveness of Wood Preservatives against Decay1
-
12. Specific Studies on the Soil-Block Procedure for Bioassay of Wood Preservatives