Wood Extraction
Mostrando 1-12 de 65 artigos, teses e dissertações.
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1. DISPARITY IN THE GROSS PRODUCTION VALUE OF NATIVE WOOD PRODUCTS OF THE PARAÍBA MESOREGIONS, BRAZIL (1994-2017)
RESUMO Este artigo analisou a disparidade do valor bruto de produção dos produtos madeireiros do extrativismo vegetal das mesorregiões da Paraíba, Brasil, no período de 1994 a 2017. Os indicadores empregados foram: o quociente locacional (QL), o coeficiente locacional (CL), o coeficiente de redistribuição (CRED), o coeficiente de associação geográf
Rev. Árvore. Publicado em: 25/11/2019
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2. Análise da redução da alcalinidade de compósitos cimento-madeira em função da substituição parcial do cimento Portland por pozolanas
RESUMO O objetivo desta pesquisa foi avaliar a redução da alcalinidade de compósitos cimento-madeira, produzido com cimento Portland e partículas residuais de Pinus spp., em função da substituição gradual do cimento Portland pelas pozolanas sílica ativa (SA) metacaulim (MK), cinza volante (CV), escória de alto-forno (EAF), cinza de casca de arroz (
Matéria (Rio J.). Publicado em: 25/11/2019
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3. SOIL CLASSES AND REGIONAL ORGANIC RESIDUES AFFECT NUTRITION, MORPHO-PHYSIOLOGY AND QUALITY OF COPAIBA SEEDLINGS
ABSTRACT Besides being used in the wood industry, copaiba has medicinal properties. However, continuous and excessive extraction both of wood and of oil may impair the regeneration and make the product scarce. It is very important to produce quality seedlings, both for sustainable exploitation and for the recovery of degraded and disturbed areas. The purpose
CERNE. Publicado em: 09/09/2019
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4. Subsidies for propagation of native species in Brazil with medicinal potential: Calophyllum brasiliense Cambess
Resumo: Calophyllum brasiliense Cambess. (guanandi) é uma espécie nativa com potencial medicinal e também com expectativa para exploração comercial (madeira) e recuperação de áreas degradadas. As sementes apresentam dormência física e mecânica, exigindo técnicas para superação, e necessitam de conhecimento da morfologia de sementes e plântulas
J. Seed Sci.. Publicado em: 09/09/2019
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5. Geotechnology as a Planning Tool in the Determination of Forest Extraction Costs
ABSTRACT The objective of this work was to use the geotechnology study as a planning tool in determining the costs of forest extraction. The research was carried out in areas of the Forest Company that operates in the southern region of Bahia, Brazil. The work was developed in two stages, the first corresponding to the determination of production costs of th
Floresta Ambient.. Publicado em: 05/09/2019
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6. Development of Mathematical Programming Model for Cable Logging System Location
ABSTRACT Defining the optimum points for installing of a cable logging system is a problem faced by forestry planners. This study evaluated the application of a mathematical programming model for optimal location of cable logging in wood extraction. The study was conducted in a forestry company located in Parana State, Brazil. We collected data during timbe
Floresta Ambient.. Publicado em: 10/12/2018
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7. Soil Compaction Due to Wood Harvesting Traffic at Different Extraction Distances
ABSTRACT This study evaluated the effect on Oxisol soil compaction of traffic by wood harvesting machines from different extraction distances carried out by a logging company located in Paraná State. The harvesting system was composed of a feller buncher, skidder and harvester, in which soil compaction was evaluated at four extraction distances and four dep
Floresta Ambient.. Publicado em: 08/02/2018
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8. Investigation on chemical composition and optimization of essential oil obtainment from waste Pinus taeda L. using hydrodistillation
ABSTRACT: The extraction of essential oils obtained by the hydrodistillation of needles/twigs waste of Pinus taeda L. was optimized by applying response surface methodology (RSM), with 24 full factorial design, in order to improve oil essential production, and aggregate value to the production chain of pine wood. Through the model it was possible to ascertai
Braz. arch. biol. technol.. Publicado em: 07/06/2016
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9. PYROLIGNEOUS LIQUOR PRODUCED FROM ACACIA MEARNSII DE WILD WOOD UNDER CONTROLLED CONDITIONS AS A RENEWABLE SOURCE OF CHEMICALS
Acacia mearnsii de Wild (black wattle) is one of the most important trees planted in Southern Brazil for tannin extraction and charcoal production. The pyrolysis of the black wattle wood used for obtaining charcoal is performed in brick ovens, with the gas fraction being sent directly into the environment. The present study examines the condensable compounds
Quím. Nova. Publicado em: 2015-09
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10. Characterization of xylanase from Streptomyces sp. FA1 and its application for bamboo hydrolysis
Native cellulose can be disintegrated into substructures with nano-size dimension through electronspinning. Typically, the most common source material available for cellulose nano-fiber production is wood. More attempts are employed to find new suitable resources to produce nano-cellulose at present. Bamboo boasts the abundant resource in China and possesses
Matéria (Rio J.). Publicado em: 2014-12
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11. Identification and characterization of viroids in 'Navelina ISA 315' sweet orange
To date, seven species of viroids have been described infecting Citrus. However, only Citrus exocortis viroid (CEVd), Hop stunt viroid (HSVd) and Citrus dwarfing viroid (CDVd) have been reported in this crop in Brazil. The aim of our work was to identify and characterize viroids infecting plants of 'Navelina ISA 315' sweet orange cultivar grafted on 'Rangpur
Trop. plant pathol.. Publicado em: 2013-02
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12. Avaliação do processo SuperBatchTM para produção de polpa celulósica a partir de Bambusa vulgaris / Evaluation of SuperBatch(TM) process for the production of pulp from Bambusa vulgaris
The present study aimed to evaluate and compare the kraft pulping conventional processes and SuperBatchTM for Bambusa vulgaris aiming the production of pulp unbleached (kappa number 58 ± 2). The raw material was characterized with respect to basic density, chemical composition and morphology of fibers, was analyzed an aqueous pre-extraction temperatures of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/09/2012