Mature Wood
Mostrando 1-12 de 19 artigos, teses e dissertações.
-
1. Behavior of Juvenile and Mature Eucalyptus cloeziana Wood Subjected to Drastic Drying
ABSTRACT This study aimed to evaluate the behavior of samples of juvenile and mature Eucalyptus cloeziana wood when subjected to the drying process, and the influence of the anatomy on that behavior. In order to do this, saturated specimens from this woods measuring 10 × 5 × 1 cm were subjected to drastic drying at 100 °C, where the drying rates and the e
Floresta Ambient.. Publicado em: 23/05/2019
-
2. Mechanical tests on Corymbia citriodora battenboard panels coated and reinforced with giant bamboo veneers
RESUMO Painéis sarrafeados de madeira densa geralmente rompem na linha de cola, ao serem carregados. Objetivou-se mostrar que lâminas finas obtidas de colmos maduros de Dendrocalamus asper, por meio de torneamento mecânico, são apropriadas para revestir e reforçar tanto a madeira de eucalipto processada, com pequenas espessuras, como painéis sarrafeado
Pesqui. Agropecu. Trop.. Publicado em: 08/04/2019
-
3. 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
-
4. Ontogênese, função e evolução das traqueídes vasculares em Cactaceae, tendo como modelo o cacto colunar Pilosocereus aurisetus (Werdern.) Byles &G. D. Rowley / Ontogenesis, function and evolution of wide-band tracheids in Cactaceae: Ontogenesis, function and evolution of wide-band tracheids in Cactaceae: using Pilosocereus aurisetus as a model cactus.
Studies with wide-band tracheids have adressed phylogenetic and functional questions. Although these cells have been described as tracheids, with secondary cell walls thicker than 2µm, their recent register in different tissues of other families has pointed out that this definition may not be well established. The aim of the present study is to understand t
Publicado em: 2010
-
5. Compostagem de esterco de galinha: composiÃÃo quÃmica da matÃria orgÃnica e extraÃÃo de substÃncias hÃmicas / Chicken manure composting: organic matter composition and humic substances extraction
The agro-industrial activities are responsible for the generation of large amounts of organic waste, and composting is an efficient process for the treatment of such waste; humification degree is an important parameter for determining the quality of the compost produced. This study aims to evaluate the dynamics of humification of organic matter during compos
Publicado em: 2009
-
6. Proteomic analysis of the cambial region from mature Eucalyptus grandis trees / Análise proteômica da região cambial de árvores adultas de Eucalyptus grandis
O gênero Eucalyptus é a fonte principal de madeira para a indústria de papel e celulose de países tropicais e subtropicais e tem sido extensivamente estudado. Apesar de sua importância econômica, muito pouco é conhecido sobre o controle genético da formação da madeira (xilogênese) no eucalipto. Diferentes propriedades da madeira são observadas du
Publicado em: 2008
-
7. Análise proteômica da embriogênese somática e da aquisição de competência embriogência de Ocotea catharinensis Mez (Lauraceae)
Ocotea catharinensis is a forest tree species from Mata Atlântica that has economic importance due to its wood and essential oils. O. catharinensis became an endangered species mostly because of its intense exploitation and its low seed production and viability. The objective of this work was to study O. catharinensis somatic embryogenesis through the compa
Publicado em: 2006
-
8. Dieta, padrão de atividades e area de vida de Alouatta belzebul discolor (Primates, Atelidae) em Paranaita, norte de Mato Grosso
This study treats the feeding ecology of a group of seven to nine red-handed howlers (Alouatta belzebul discolor) in primary forest ITom the northem Mato Grosso State, southem Amazon. Another species of howler monkey is reported for the area, Alouatta seniculus, and their interactions described. Diet, activity pattems, day range and home range in A. b. disco
Publicado em: 2002
-
9. Identificação e caracterização de proteinas e genes expressos diferencialmente durante o desenvolvimento do embrião zigotico de Araucaria angustifolia
Arauearia angustifolia, the only native conifer in Brazil, covered the States of Paraná (40%), Santa Catarina (31 %) and Rio Grande do Sul (25%). Sparse patches were also found in areas with elevated altitudes, in the States of São Paulo (3%), Minas Gerais and Rio de Janeiro (1 %). The A. angustifolia wood was, for a long time, one of the most important ex
Publicado em: 2002
-
10. Organização e estrutura das comunidades vegetais de cerrado em um gradiente topografico no Brasil central
Several lines of evidence suggest that the variation in Cerrado physiognomy is determined and maintained by fire. The objective of this study was to determine and describe pattems indicating that after 19 yr of fire protection, the Cerrado vegetation developed to a high density and cover mature vegetation. The hypothesis of this study was that protected Cerr
Publicado em: 1993
-
11. Wood contains a cell-wall structural protein.
A pine extensin-like protein (PELP) has been localized in metabolically active cells of differentiating xylem and in mature wood of loblolly pine (Pinus taeda L.). This proline-rich glycosylated protein was purified from cell walls of differentiating xylem by differential solubility and gel electrophoresis. Polyclonal rabbit antibodies were raised against th
-
12. Altered Growth and Wood Characteristics in Transgenic Hybrid Aspen Expressing Agrobacterium tumefaciens T-DNA Indoleacetic Acid-Biosynthetic Genes.
A key regulator of cambial growth is the plant hormone indoleacetic acid (IAA). Here we report on altered wood characteristics and growth patterns in transgenic hybrid aspen (Populus tremula L. x Populus tremuloides Michx.) expressing Agrobacterium tumefaciens T-DNA IAA-biosynthetic iaaM and iaaH genes. Eighteen lines simultaneously expressing both genes wer