Tropical Timber
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. Evaluation of moisture content variation on strength and stiffness properties of Cedrella sp. wood specie
Abstract In order to evaluate the influence of moisture content on wood physical and mechanical properties, the present research analyzed the influence of moisture content variation on Cedrella sp. on 12 strength and stiffness properties, considering 12% moisture content up to Fiber Saturation Point (FSP) were considered. Brazilian Standard consider a correc
REM - International Engineering Journal. Publicado em: 2022
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2. Influence of treatment with water-soluble CCB preservative on the physical-mechanical properties of brazilian tropical timber
This aim of this work is to present an analysis of the influence of impregnation against biological demand, realized with saline solution of CCB (Chromated Copper Borate preservative) by vacuum-pressure process, on physical-mechanical properties of tropical wood species Simarouba sp., Cedrelinga catenaeformis and Erisma uncinatum Warm. In theory, such proces
Mat. Res.. Publicado em: 13/01/2020
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3. WATER AND LIGHT STRESSES DRIVE ACCLIMATION DURING THE ESTABLISHMENT OF A TIMBER TREE UNDER DIFFERENT INTENSITIES OF RAINFOREST CANOPY COVERAGE
ABSTRACT The loss of structure, diversity and functions in the rainforests makes it necessary to develop active strategies to restore their economic and ecological values. Planting selected species can help to catalyze ecosystem restoration. The capacity of the plants to survive and grow in the rainforests, where the canopy coverage changes stochastically, i
CERNE. Publicado em: 20/05/2019
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4. Small-scale Management of Secondary Forests in the Brazilian Atlantic Forest
ABSTRACT Sustainable management of tropical and subtropical secondary forests for multiple purposes, including timber, may encourage farmers to promote regeneration of native forest. We studied the population structures and commercial timber production in two adjacent 33 years-old Brazilian Atlantic Forest stands: a 26 ha forest managed through enrichment w
Floresta Ambient.. Publicado em: 08/04/2019
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5. First report of Hypsipyla grandella (Lepidoptera: Pyralidae) on African mahogany Khaya ivorensis
ABSTRACT The mahogany shoot borer Hypsipyla grandella Zeller is an important economic pest in all American tropical forests, because it prevents monoculture of valuable timber trees species like mahogany and cedar. The shoot borer damages several tree structures, especially the apical shoots, impairing the formation of the commercial stem. This pest can atta
Sci. agric. (Piracicaba, Braz.). Publicado em: 2017-12
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6. 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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7. INFLUÊNCIA DE VARIÁVEIS DENDROMÉTRICAS, ANATÔMICAS E AMBIENTAIS NA PRODUÇÃO DE FRUTOS E SEMENTES DE Bertholletia excelsa H.B.K. / INFLUENCE OF DENDROMETRIC, ANATOMIC AND ENVIRONMENTAL VARIABLES IN THE PRODUCTION OF FRUITS AND SEEDS OF BRAZILIAN NUT (Bertholletia excelsa H.B.K.)
Bertholletia excelsa H.B.K. é uma espécie semidecídua, heliófila, característica da mata de terra firme e, normalmente emergente, da qual se coleta os frutos e as sementes para utilização na alimentação. Todavia, o conhecimento sobre os fatores que influenciam a produção de frutos e sementes das árvores é incipiente. Neste trabalho, buscou-se av
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/11/2011
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8. 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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9. Modelagem da dinâmica de crescimento de uma Floresta Ombrófila aerta do estado de Rondônia / Modelling of growth dynamics of tropical rain forest of State of Rondonia, Brazil.
A model of the growth dynamics of forests was developed applying Bertalanffy growth model (BGM) y=a[(1ebt)c] for individual trees. Based on linearized relationship with diameter and height equation LnH=b0+LnD and volume equation V=b0Db1Hb2 mutually compatible equations for diameter, basal area, height and volume were generated, adjusting parameters a and c o
Publicado em: 2009
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10. Estudo da molhabilidade em madeiras tropicais ou de reflorestamento por medidas de ângulo de contato e de permeabilidade / Study of wettability in tropical or reforestation timber by contact angle technique and permeability measures.
Este trabalho tem por objetivo estudar a molhabilidade e a permeabilidade para quatro espécies de madeiras tropicais (Pinus elliottii, Araucaria angustifolia, Eucalyptus grandis e Eucalyptus citriodora). A molhabilidade é um parâmetro importante para a caracterização de diferentes espécies de madeira e, portanto, depende de fatores como o estado de lim
Publicado em: 2008
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11. Forestry activities in the region of Xingu river (Pará state, Brazil): productive chain and technological properties of less known species / Madeiras tropicais com potencial comercial da região do Rio Xingu (Pará, Brasil) : propriedades tecnológicas e cadeia produtiva
O baixo aproveitamento dos recursos florestais e a dificuldade de implementação do Manejo Florestal Sustentável (MFS) no Brasil oneram a extração florestal nacional devido, sobretudo, à falta de informações da cadeia produtiva madeireira, à deficiência de informações tecnológicas relativamente à qualidade da madeira e ao aproveitamento comercia
Publicado em: 2008
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12. Avaliação de dados SAR polarimétricos para estimativa volumétrica de florestas tropicais / Polarimetric SAR data analysis for tropical forest volume estimation
In this study it was evaluated the potential of polarimetric synthetic aperture radar (PolSAR) data for the retrieval of timber volume over tropical forests, with sights to identify areas with potential for sustainable timber production. As a secondary focus, it was made a sensitivity analysis of the PolSAR data in detecting floristic and structural variatio
Publicado em: 2007