Tropical Woods
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Effects of Frequency, Temperature and Test Duration in the Viscoelasticity of Brazilian Hardwoods Used in Handmade Musical Instruments
This study aims to make a comprehensive analysis on the viscoelastic behavior of typical tropical hardwoods and its influences in making musical instruments. For that a Dynamic-Mechanical Analysis was done and the mechanical parameters dependence on test control parameters like temperature, frequency and test duration time were measured. For Dalbergia Nigra
Mat. Res.. Publicado em: 24/10/2019
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2. AVALIAÇÃO DE ESPECTRÔMETRO NIR PORTÁTIL E PLS-DA PARA A DISCRIMINAÇÃO DE SEIS ESPÉCIES SIMILARES DE MADEIRAS AMAZÔNICAS
Supervising wood exploitation can be very challenging due to the existence of many similar species and the reduced number of wood identification experts to meet the demand. There is evidence that valuable endangered wood species are being smuggled disguised as other species. Near infrared spectroscopy (NIRS) and chemometrics has been successfully used to dis
Quím. Nova. Publicado em: 2017-05
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3. Chemical and biological evaluation of rejects from the wood industry.
Este estudo visa a caracterização química e a avaliação da atividade antimicrobiana de extratos obtidos a partir de rejeitos resultantes do beneficiamento de madeiras nobres comercializadas no Paraná: Peroba-Rosa (Aspidosperma sp.), Roxinho (Peltogyne sp.), Jatobá (Hymenaea sp.), Curupixá (Micropholis sp.), Itaúba (Mezilaurus sp.), Cedrilho (Erisma
Brazilian Archives of Biology and Technology: an International Journal. Publicado em: 2011
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4. Modular bridge timber trusses system: a good alternative to the Para State / Sistemas de treliças modulares para pontes de madeira: uma boa alternativa para o Estado do Pará
The Para state has an area of 1.253.164,49 KM POT.2; it has an abundant hydrography and nearly 19.253,35 Km of vicinal roads, that are cut by many rivers. In this context, the construction of bridges with small and medium spans is essential to the improvement of intercity and interstate transportation. The system of modular timber truss bridges, was already
Publicado em: 2010
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5. Efeito do intemperismo artificial em quatro madeiras tropicais monitorado por espectroscopia de infravermelho (DRIFT)
Four tropical woods, were investigated to compare their performance and natural resistances to artificial weathering using the diffuse reflectance infrared Fourier transform spectroscopy (DRIFT). The species were garapeira (Apuleia leiocarpa), itaúba (Mezilaurus itauba) and tauari (Couratari sp.), woods traditionally indicated for exterior uses, and marupá
Química Nova. Publicado em: 2008
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6. THERMAL TREATMENTS FOR THE COLORIMETRIC STABILIZATION OF TROPICAL HARDWOOD / Aplicação de tratamentos térmicos para estabilização colorimétrica de madeiras tropicais
Three tropical wood species, Simarouba amara, Sextonia rubra and Cariniana micrantha, were submitted to four thermal treatments aiming to improve the resistance to photo degradation after 84 hours of ultraviolet irradiation. The treatments were: I - one hour at 150C; II - two hours at 150C; III - one hour at 200C; IV - two hours at 200C. The non-destructive
Publicado em: 2008