7 documents found, page 1 of 1
STUDY OF THE INFLUENCE OF WOOD PROPERTIES ON THE CHARCOAL PRODUCTION: APPLYING ...
Pereira,Kaléo Dias; Carneiro,Antônio Policarpo Souza; Santos,Gerson Rodrigues dos; Carneiro,Angélica de Cassia Oliveira; Leite,Hélio GarciaABSTRACT The understanding of the relationship between the properties of wood and charcoal makes it possible to improve the production of charcoal. Therefore, the random forest algorithm was used in this study to analyze the influence of eucalyptus wood properties on the quality of charcoal as well as the accuracy of the predicted values concerning the results estimated by support vector regression and multiple...
ANATOMICAL, ULTRASTRUCTURAL, PHYSICAL AND MECHANICAL WOOD PROPERTIES OF TWO-YEA...
Zanuncio,Antonio José Vinha; Carvalho,Amélia Guimarães; Carneiro,Angélica de Cassia Oliveira; Tomazello Filho,Mario; Valenzuela,Paulina; Gacitúa,WilliamABSTRACT Eucalyptus wood from adult trees is used for several purposes; however, the wood of younger trees has limited use. This study aims to characterize and propose uses of two-year-old eucalyptus wood. Six two-year-old Eucalyptus grandis × Eucalyptus urophylla clones have been selected and their anatomical, ultrastructural, physical and mechanical wood characteristics evaluated. The wood of Clone A shows mo...
Método de ressonância para predição das propriedades mecânicas das madeiras de ...
Carvalho,Amélia Guimarães; Zanuncio,Antonio José Vinha; Silva,Carlos Miguel Simões da; Carneiro,Angélica de Cassia Oliveira; Paula,Marcos Oliveira deRESUMO Vibrações transversais apresentam potencial para avaliação da madeira devido a alta precisão, baixo custo e rapidez, mas sua aplicação em madeira termorretificada ainda é pouco estudada. O objetivo deste trabalho foi avaliar as propriedades físicas e mecânicas de madeira termorretificada de Eucalyptus urophylla e Pinus oocarpa e relacionar a análise de ressonância (Bing) com o modulo de elasticidade está...
Characterization of eucalyptus clones subject to wind damage
Zanuncio,Antônio José Vinha; Carvalho,Amélia Guimarães; Carneiro,Angélica de Cassia Oliveira; Valenzuela,Paulina; Gacitúa,William; Leite,Fernando PalhaAbstract: The objective of this work was to test a new methodology to assess the resistance of trees to wind damage and determine the characteristics that increase clone resistance to winds. Tree resistance to breakage, basic density, ultrastructure, anatomy, mechanical properties, and wood growth stress have been evaluated in seven Eucalyptus grandis × Eucalyptus urophylla clones, collected from a region with ...
ENERGY PROPERTIES OF WOOD PARTICLES TORREFIED AT DIFFERENT TEMPERATURES
Silva,Carlos Miguel Simões da; Vital,Benedito Rocha; Carneiro,Angélica de Cassia Oliveira; Oliveira,Aylson Costa; Araújo,Solange OliveiraABSTRACT The objective of this study was to evaluate the effect of the final torrefaction temperature on the energy properties of wood. It was applied four treatments with three replicates, consisting of untreated wood particles and particles torrefied at temperatures of 170, 220 and 260ºC. Better physical, chemical and thermal properties of the particles were observed as a function of the torrefaction temperat...
RELATIONSHIP BETWEEN THE ANATOMY AND DRYING IN Eucalyptus grandis X Eucalyptus ...
Zanuncio,Antônio José Vinha; Carvalho,Amélia Guimarães; Damásio,Renato Augusto Pereira; Oliveira,Bráulio da Silva deABSTRACT Drying is an important step to using wood and anatomical characteristics influence this process. Thus, the objective of this work was to evaluate the relationship between anatomy and wood drying. Samples with 2 x 2 x 4 cm were obtained from eight Eucalyptus urophylla x Eucalyptus grandis clones at 1.3 m height to evaluate the anatomy and drying in climate chamber during 15 days. Cell wall fraction was ...
COMPOSIÇÃO QUÍMICA DA MADEIRA DE EUCALIPTO COM DIFERENTES NÍVEIS DE DESBASTE
Zanuncio,Antônio José Vinha; Colodette,Jorge Luiz; Gomes,Fernando Jose Borges; Carneiro,Angélica de Cassia Oliveira; Vital,Benedito RochaRESUMO O objetivo deste estudo foi avaliar diferentes regimes de desbaste em plantios silviculturais de clones de eucalipto (Eucalyptus urophylla x Eucalyptus grandis) para produção de madeira visando à obtenção de celulose e carvão com a finalidade de verificar se este efeito poderia afetar quantitativamente a proporção dos componentes químicos da madeira. O espaçamento inicial médio entre plantas foi de 3 x 3...