Heartwood
Mostrando 13-24 de 39 artigos, teses e dissertações.
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13. Influence of Age on the Discrimination of Tectona grandis by VIS/NIR Spectroscopy
ABSTRACT Wood color and properties are variables among and within species, and fast and non-destructive techniques can be applied to their characterization, being also important in wood marketing and quality control. This paper evaluated the influence of age on the discrimination of Tectona grandis L.F. (teak) wood by VIS/NIR spectroscopy. Wood from three ag
Floresta Ambient.. Publicado em: 02/05/2019
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14. Effect Of Planting Spacing In Production And Permeability Of Heartwood And Sapwood Of Eucalyptus Wood
RESUMO O objetivo deste trabalho foi avaliar a influência de diferentes áreas úteis proporcionadas pelos espaçamentos de plantio (3 × 1, 3 × 2, 3 × 3, 3 × 4 m) na produção e na permeabilidade do cerne e do alburno da madeira de clones de Eucalyptus grandis e Eucalyptus grandis × Eucalyptus urophylla, aos 4 anos de idade. Independente do clone, n�
Floresta Ambient.. Publicado em: 14/03/2019
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15. Relevance of wood anatomy and size of Amazonian trees in the determination and allometry of sapwood area
RESUMO Processos hidrológicos de povoamentos florestais são predominantemente influenciados pela composição de espécies arbóreas e suas características morfo-fisiológicas. No entanto, existem poucos estudos sobre os padrões anatômicos que determinam o sistema hidráulico de plantas em ecossistemas tropicais. Por isso, nosso objetivo foi o de analis
Acta Amaz.. Publicado em: 2019-03
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16. Dendrological Characterization as Inspection Resources of Caatinga Wood Market
ABSTRACT This study aimed to distinguish five native forest species of the Caatinga Biome from the exotic invasive algaroba (Prosopis juliflora (Sw.) DC.), considering dendrologic characteristics of bark and wood, in order of providing subsidies for the inspection of the wood market in this Biome. The native species studied were jurema-preta (Mimosa tenuifl
Floresta Ambient.. Publicado em: 07/06/2018
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17. Effect of Steaming on the Colorimetric Properties of Eucalyptus saligna Wood
ABSTRACT This study aimed to homogenize the color of Eucalyptus saligna wood by means of steaming and compare the resulting color with that of Cariniana legalis wood, a species of high commercial value. To this end, two steaming curves were tested: 100% relative humidity for 12 (T1) and 24 (T2) hours at 90 °C followed by drying in a pilot-scale conventiona
Floresta Ambient.. Publicado em: 19/03/2018
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18. Heartwood and sapwood in eucalyptus trees: non-conventional approach to wood quality
ABSTRACT This study evaluated the quality of heartwood and sapwood from mature trees of three species of Eucalyptus, by means of the qualification of their proportion, determination of basic and apparent density using non-destructive attenuation of gamma radiation technique and calculation of the density uniformity index. Six trees of each species (Eucalyptu
An. Acad. Bras. Ciênc.. Publicado em: 2018-03
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19. Antidiarrheal activity of extracts from Maytenus gonoclada and inhibition of Dengue virus by lupeol
ABSTRACT Diarrhea is an infectious disease caused by bacterial, virus, or protozoan, and dengue is caused by virus, included among the neglected diseases in several underdeveloped and developing countries, with an urgent demand for new drugs. Considering the antidiarrheal potential of species of Maytenus genus, a phytochemical investigation followed by antib
An. Acad. Bras. Ciênc.. Publicado em: 2017-09
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20. Chemical compositions and termiticidal activities of the heartwood from Calophyllum inophyllum L.
Extratos de madeira de cerne de Calophyllum inophyllum (bintangor) foram obtidos pelo método de agitação e os seus componentes analisados por cromatografia em fase gasosa-espectrometria de massa (GC-MS). Dez compostos foram identificados pelo emprego de solvente etanol (EtOH), e catorze por metanol (MeOH) e apenas nove por éter de petróleo (PETETHR). Os
An. Acad. Bras. Ciênc.. Publicado em: 2015-06
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21. Hippocratic screening and subchronic oral toxicity assessments of the methanol extract of Vatairea macrocarpa heartwood in rodents
Vatairea macrocarpa (Benth.) Ducke, Fabaceae, is popularly known as 'angelim'. Its heartwood macerate is used to treat inflammation, gastric ulcer, diabetes and infections. The oral acute and subchronic toxicity of the methanol extract of V. macrocarpa heartwood (MEVm) was evaluated. In the Hippocratic screening, a single administration of MEVm was given ora
Rev. bras. farmacogn.. Publicado em: 17/07/2012
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22. Chemical composition and natural durability of juvenile and mature heartwood of Robinia pseudoacacia L.
O objetivo deste estudo foi caracterizar as propriedades da região de cerne dos lenhos juvenis e adultos de Robinia pseudoacacia L. O conteúdo, a composição, bem como a localização subcelular dos extrativos foram estudados em 14 árvores de florestas de produção na Alemanha e na Hungria, assim como em 16 árvores de quatro tipos clone. Os extrativos
Anais da Academia Brasileira de Ciências. Publicado em: 15/07/2011
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23. Equações para cálculo do volume e peso de compartimentos aéreos de árvores de Grevillea robusta (Cunn.) aos oito anos de idade.
2004
Boletim de Pesquisa Florestal. Publicado em: 2011
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24. Wettability, Shrinkage and Color Changes of Araucaria angustifolia After Heating Treatment
The effects of thermal treatment on the wettability and shrink resistance of Araucaria angustifolia (Parana pine) were studied from 20 to 200 °C. The contact angles of water droplets on untreated and heat-treated samples were measured by the sessile drop method in the grain of heartwood and sapwood cut in the radial, longitudinal, and tangential directions.
Materials Research. Publicado em: 2010-09