IZOMBé (Testulea gabonensis)
Nome comercial
Izombé
Nome científico (autor)
Testulea gabonensis Pellegr.
Família
OCHNACEAE
Nomes comuns
Zombé (Gabon); Ossakogha (Gabon); N'komi (Gabon); Mogongou (Gabon); Izombe (Gabon); N'gwaki (Congo); Rone (Cameroon); N`gwaki (Congo); Akewe (Gabon); N`komi N`komi (Gabon); Ake (Gabon); Izombe
DESCRIÇÃO DA ÁRVORE
Descrição botânica
The tree reaches a height of 40 m. The bole is cylindrical, straight and clear to 10 to 20 m in length, buttressed. The trunk diameter attains 100 to 130 cm.
Habitat natural
Testulea gabonensis occurs in areas of primary forest and transitional formations. It is found in dense, mixed, equatorial forests. It is known or inferred that the harvesting of specimens from the wild for international trade has, or may have, a detrimen
Distribuição natural
West Africa, in Gabon, Republic of Congo and Cameroon.
IDENTIFICAÇÃO DA MADEIRA
Descrição anatômica da madeira (macro e micro)
Wood diffuse porous. Vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 100 micras or less (very small). Vessels per mm2 more than 20 (very abundant). Simple perforation plates. Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Paratracheal axial parenchyma scanty and/or vasicentric. Non-crystals in axial parenchyma cells. 5 to 8 cells per parenchyma strand. 4 to 10 rays per mm (medium). Rays non-storied. Rays 1 to 4 seriate. Prismatic crystals in radial alignment in procumbent ray cells (chambered cells). Prismatic crystals in the ray cells. Heterogeneous rays and/or multiseriate heterogeneous rays. Non-septate fibers. Fibers with distinctly bordered pits.
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Foto de madeira macroscópica (tangencial)
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Foto da secção transversal microscopica
DISPONIBILIDADE
Situação CITES sobre a proteção
Unrestricted
DESCRIÇÃO GERAL DA MADEIRA
Cor
The heartwood is pink yellow to orange yellow, it is not clearly demarcated. The silver figure is fine (barely visible).
Indice de cor
5
Grã
Straight or slightly interlocked, sometimes with an influence on further processing operations.
Veios ou desenhos na superfície
This species is reported to have a fine to medium texture.
Brilho
The surface of the wood is naturally low in luster.
DURABILIDADE NATURAL
Durable to decay; this species can be utilized without preservative treatment for exterior joinery or similar uses. Resistant to termites attack. The heartwood is sensible to Lyctus attacks.
Indice de durabilidade natural
1
Tensões internas do crescimento
No growth stresses are reported in this species.
Conteúdo de sílica
Silica Content: Negligible contents of silica are found in timber of this species. Amounts over 0.05% may affect the wood processing. Silica Value: 0.01
Tratamento preservativo
Difficult to treat with only a low penetration of the preservative products.
PROPRIEDADES FÍSICAS DA MADEIRA
Densidade básica (Peso seco/Volume saturado) (g/cm³)
0.65
Densidade seca ao ar 12% (g/cm³)
0.72
Contração Tangencial Total (Saturado até peso seco) (%)
6.9
Contração Radial Total (Saturado até peso seco) (%)
4.0
Programa de secagem recomendável
FR-8
Estabilidade dimensional (Contração Tangencial Total %/Contração Radial Total %)
1.7
Programa de secagem detalhado
http://www.tropicaltimber.info/wp-content/uploads/2015/09/KD_French.pdf
PROPRIEDADES QUÍMICAS DA MADEIRA
PROPRIEDADES MECÂNICAS DA MADEIRA
Resistência a flexão a 12% (Módulo de ruptura) (kgf/cm²)
1019
Flexão Estática a 12% (Módulo de elasticidade) (kgf/cm²)
133425
Resistência a compressão paralela as fibras a 12% (kgf/cm²)
620
Resistência a compressão perpendicular as fibras a 12% (kgf/cm²)
83
Cisalhamento radial a 12% (kgf/cm²)
78
Dureza Janka a 12% (perpendicular) (kgf)
644
Dureza Janka a 12% (paralela) (kgf)
737
TRABALHABILIDADE
Serrar ou Cortar
It is moderately easy to saw.
Desdobro da tora em torno para lâminas
Suitable for slicing.
Desdobro da tora em faqueadeira para lâminas
Suitable for slicing.
Desgaste de ferramentas
Slight blunting effect; ordinary tools can be used for sawing and machining.
Aspectos do processamento em máquinas
Machining of this species is reportedly easy.
Aplainamento
Moderately easy; tools must be cautiously sharpened.
Aplicação para molduras
Moderately easy; tools must be cautiously sharpened.
Torneamento
30
Furação
Moderately easy; tools must be cautiously sharpened.
Fresagem_ranhura_canais
Moderately easy; tools must be cautiously sharpened.
Comportamento na aplicação de pregos
Pre-boring is necessary.
Colagem
Glues well if basic gluing technical rules are followed.
Lixamento
Easy to perform; it gives good results.
Operação de lustre da superfície (brilho)
Can be polished without surface preparation.
Trabalhabilidade com ferramentas manuais
No particular problems.
USOS FINAIS RELATADOS
USOS FINAIS (RESUMO)
HOUSING GENERAL, boards, flooring, parquet, frames, steps, panelling, fittings, FURNITURE AND CABINETS, luxury furniture, cabinets, PLYWOOD AND VENEER, Decorative veneer, TURNING, ornaments, turned furniture, cutlery, lasts, CONTAINERS, truck bodies, truck flooring, NAVAL CONSTRUCTION, boats, boat hulls, boat deck, port storage, OTHER AND MUSICAL INSTRUMENTS, handicrafts, moldings
CASAS
- 10 - Silica in Timbers
Tábuas
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Pisos
- 14 - Handbook of Hardwoods
Parquets
- 15 - Empire Timbers
Marcos de portas
- 16 - Woods of the World
Degraus de escada
- 17 - Tree Conservation Database
Painéis
- 18 - W3TROPICOS Missouri Botanical Garden
Acessórios de madeira
- 19 - Silica in Timbers
MÓVEIS GABINETES
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Móveis finos
- 22 - Dry kiln schedules for commercial woods. Temperate and tropical. Section IV-Asian and Oceanian Woods
Gabinetes
- 24 - Empire Timbers
CHAPAS
- 25 - Directory of Timber Trade Malaysia
Lâminas decorativas
- 28 - Ministry of Agriculture, Fisheries & Forest of Fiji
Torneamento
- 30 - Embassy of Honduras in Japan
Artigos torneados
- 31 - Embassy of Colombia in Japan
Artigos torneados
- 32 - Embassy of Cote d`Ivoire in Japan
Cabo de faca
- 33 - Embassy of Gabon in Japan
Formas de sapateiro
- 34 - Embassy of Indonesia in Japan
Carroceria de caminhão
- 53 - Timbers of the New World
Pisos para assoalho de trem
- 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
CONSTRUÇÃO NAVAL
- 55 - Tropical Timber Atlas of Latin America
Barcos
- 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
Casco para barcos
- 57 - Estadísticas de Aprovechamiento, Exportación y comercialización Nacional de Productos Forestales
Coberta para barcos
- 59 - Programa Nacional de uso Sostenible de los Bosques e Incremento a las Exportaciones.
Port Storage
- 62 - Estudio Tecnológico de Maderas del Perú (Zona Pucallpa) Vol I
Artesanato
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Molduras de quadros
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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