ABURA/BAHIA (Hallea stipulosa)
Nombre comercial
Abura/Bahia
Nombre científico (con autor)
Hallea stipulosa Leroy
Familia
RUBIACEAE
Nombres Comunes
Mboi (Sierra Leone); Abura (Nigeria); Subaha (Ghana); Bahia (Côte d`Ivoire); Bahia (France); Mvuku (Zaire); Elelom Nzam (Gabon); Elelon (Equatorial Guinea); Vuku (Congo); Elolom (Cameroon); Nzingu (Uganda); Nzingu (Zambia); Mivuko (Angola); Yowi; Yar-yar; Ya-ya; Wuwoko; Wowovoko; Vuku; Voukou; Uwen; Ugbodokossa; Uburn; Ubura; Ubolu-mili; Tileul d`afrique; Supuya; Subosema; Subaya; Subaha; Songwa; Sofo; Powo; Popoe; Popo; Poplar; Pope; Poboi; Ovbevbe; Oo; Ohombe; Ogouwa; Obul; Obol; Obi; Nzingu; Mvuku; Munyamaizi; Munga; Muho; Moukonia malamba; Mboroagalaga; Mboi; Maluku; Malucu; Maloucou; M`boy; Louambo; Kwo-kwo; Kpowo; Kpoo; Kofo; Kechi lebet; Iluku; Idabakoror; False opepe; Ewe; Eti-ayip; Elilom; Eben; Ebar; Eba; Dong; Burokossa; Bulokossa; Bopi-le; Boh; Boei; Bo; Beya; Beiya; Baya; Bahia; Ba; Am-bop; Akpakosso; Agidilif; African linden; Afop zam; Abura
Nombres científicos sinónimos (con autores)
Nauclea stipulosa DC.; Mitragyna stipulosa (DC.) Kuntze; Mitragyna macrophylla (Perr. & Lepr. ex DC.) Hiern
DESCRIPCIÓN DEL ÁRBOL
Descripción botánica
The tree reaches a height of 35 m, it often has short, thick buttresses. The trunk diameter attains 70 cm.
Hábitat natural
Hallea stipulosa widespread and important source of timber which occurs most commonly in swampy areas. It is dominant in swamp forests, rain forests and along lake shores.
IDENTIFICACIÓN DE LA MADERA
Descripción anatómica de la madera
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Vestured pits. Vessels per mm2 more than 20 (very abundant). Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. Intervessel pits medium, 7 to 10 mi Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Non-crystals in axial parenchyma cells. 5 to 8 cells per parenchyma strand. Rays more than 10 per mm (abundant). Rays non-storied. Larger rays more than 4 seriate. Occasionally silica bodies in the ray cells. Heterogeneous rays and/or multiseriate heterogeneous rays. Non-septate fibers. Fibers with distinctly bordered pits.
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Foto macroscópica de la madera, plano radial
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Foto microscópica sección transversal de la madera
Disponibilidad
Status de protección por CITES
Unrestricted
DESCRIPCIÓN GENERAL DE LA MADERA
Color
The heartwood is pink beige to pinkish brown, it is not clearly demarcated. The silver figure is fine.
Indice de Color (1= Negro, violeta; 7= Amarillo claro, blanco)
5
Grano
Straight; grain has no particular influence on drying, machining and finishing qualities.
Veta
The wood is mostly fine in texture.
Brillo
Timber of this species is low in luster.
Durabilidad Natural
Not durable; important risks of decay attacks at any processing step, from logs up to final products. It must receive preservative treatment. Sensible to termites attack. Heartwood is sensible to Lyctus attacks.
Indice de Durabilidad Natural (1=Muy alta, 7=Muy baja)
5
Internal growth stresses
No growth stresses are reported in this species.
Contenido de sílice
Silica Content: It is reported to have silica. Contents over 0.05% may affect wood processing. Silica Value: 0.23
Dificultad para impregnar
Moderately easy to treat with a partial penetration of the preservative products.
PROPIEDADES FÍSICAS DE LA MADERA
Densidad Básica (Peso anhidro/Vol. saturado) (g/cm³)
0.57
Densidad seca al aire (Peso y volúmen CH12%) (g/cm³)
0.62
Contracción Tangencial Total (Saturado hasta anhidro) (%)
9.7
Contracción Radial Total (Saturado hasta anhidro) (%)
4.8
Defectos por secado
Ease of Drying: Drying is moderately easy; some particular care is needed. Drying Defects: Risks of distortions. Kiln Schedules: Schedule proposed as a reference by comparison with well known species taking into account to the general technological behavior of this species.
Calendario de Secado
FR-3
Estabilidad Dimensional (Contracción Total Tangencial %/Contracción Total Radial %)
2.0
PROPIEDADES QUÍMICAS DE LA MADERA
PROPIEDADES MECÁNICAS DE LA MADERA
Resistencia a flexión (Módulo de ruptura) CH12% (kgf/cm²)
865
Rigidez (Módulo de elasticidad) CH12% (kgf/cm²)
134542
Resistencia a la compresión paralela a la fibra CH12% (kgf/cm²)
486
Resistencia a la compresión perpendicular a la fibra CH12% (kgf/cm²)
60
Cizallamiento radial CH12% (kgf/cm²)
80
Dureza Janka (lados) CH12% (kgf)
480
Dureza Janka (extremos) CH12% (kgf)
583
TRABAJABILIDAD
Aserrado
It is easy to saw.
Corte de chapa rotativa
Suitable for slicing, also suitable for peeling if treated.
Chapa tranchada
Suitable for slicing, also suitable for peeling if treated.
Pérdida de filo_romado
Severe blunting effect; stellited blades for sawing and carbide tools for machining are recommended.
Maquinado general
Possible difficulties caused by interlocked grain are reported.
Cepillado
Easy; no particular problems.
Moldurado
Easy; no particular problems.
Torneado
30
Taladrado
Easy; no particular problems.
Escopleado, caja y espiga
Easy; no particular problems.
Clavado
No particular problem.
Encolado
Glues well if basic gluing technical rules are followed.
Lijado
Easy to perform; it gives good results.
Sacar lustre
Can be polished without surface preparation.
Doblar al vapor
Steam bending is difficult.
Facilidad para herramientas manuales
No particular problems.
Usos Reportados
USOS FINALES (RESUMEN)
HOUSING GENERAL, beams, joists, boards, frames, steps, panelling, fittings, FURNITURE AND CABINETS, luxury furniture, cabinets, PLYWOOD AND VENEER, faces, Decorative veneer, TURNING, ornaments, turned furniture, cutlery, lasts, OTHER AND MUSICAL INSTRUMENTS, handicrafts, moldings
VIVIENDA GENERAL
- 10 - Silica in Timbers
vigas
- 11 - Prospect: The wood database
Viguetas
- 12 - Tropical timbers of the world. Part I-Tropical American Species
Tablas
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Marcos
- 16 - Woods of the World
Peldaños
- 17 - Tree Conservation Database
Paneles
- 18 - W3TROPICOS Missouri Botanical Garden
Accesorios de madera
- 19 - Silica in Timbers
MUEBLES Y GABINETES
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Muebles finos
- 22 - Dry kiln schedules for commercial woods. Temperate and tropical. Section IV-Asian and Oceanian Woods
Gabinetes
- 24 - Empire Timbers
TABLEROS Y CHAPAS
- 25 - Directory of Timber Trade Malaysia
Caras
- 26 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
chapa decorativa
- 28 - Ministry of Agriculture, Fisheries & Forest of Fiji
Torneado
- 30 - Embassy of Honduras in Japan
artículos torneados
- 31 - Embassy of Colombia in Japan
Artículos torneados
- 32 - Embassy of Cote d`Ivoire in Japan
mangos de cuchillos
- 33 - Embassy of Gabon in Japan
Hormas zapato
- 34 - Embassy of Indonesia in Japan
artesanía
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Molduras
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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