Browsing by Author "Bih, Francis Kofi"

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characterization of Wood cellular structure of Plantation Grown Anogeissus leiocarpa and Eucalyptus camaldulensis in the savannah Ecological Zone, Ghana
(2024-12-28) Tampori, Enoch Gbapenuo; Bih, Francis Kofi; Appiah-Kubi, Emmanuel; Chakurah, Issah; Awotwe-Mensah, Michael; Donkoh, Mark Bright
The decreasing availability of economic hardwood timber species throughout tropical countries has necessitated the need to adopt plantation grown exotic timber species into the mainstream of raw materials in the furniture and wood manufacturing industries. However, published research on the material properties of most of these exotic timber species grown in the Savannah Ecological Zone of Ghana is limited. The wood properties of these species when known could result in their optimal utilization and broad acceptance in the wood industries as an alternative for the extinct tropical t imber species. This study determines the anatomical properties of plantation grown Anogeissus leiocarpa and Eucalyptus camaldulensis trees grown in the Savannah Ecological Zone of Ghana. Wood discs were obtained from three stem heights (butt, mid and top) from which cubes measuring 40 mm x 20 mm x 20 mm were produced for the microtome sections and macerated tissues, viewed under a microscope with Motic Image Plus software. Descriptions of wood anatomy followed IAWA's microscopic characteristics. It was observed that in the sapwood, there were more vessels than in heartwood, though the vessels were smaller in diameters, suggesting resistance to sap conduction which gives wood high aesthetic value and dimensional stability during drying. The species vessel diameter fell within the medium category and large vessels, demonstrating that wood will possess a greater mechanical strength since it will be denser, consequently possessing significant mechanical strength that can be compared favorably to other commercial timber species. This might be a major breakthrough in the production of quality and durable furniture as well as other wood products by using the exotic plantation grown timber species.
Physical And Mechanical Properties Of Wood Of Plantation Grown Albizia Lebbeck In The Savannah Ecological Zone, Ghana
(2024-06-07) Tampori, Enoch Gbapenuo; Bih, Francis Kofi; Antwi, Kwaku; Chakurah, Issah
The increasing scarcity of major commercial tropical hardwood species has necessitated the utilization of plantation grown exotic timber species as a potential means of maintaining Ghana's foundation of timber resources. To better consider Albizia lebbeck as a substitute for wood species which are being seriously over-exploited to the point of commercial extinction, its wood properties were characterized to expatiate its utilization potentials. Three mature plantation grown Albizia lebbeck trees with diameters 45-50 cm at breast height were purposively selected and sampled at four stem height levels of tree height. The samples were sawn into the required sizes in accordance with the British standard, BS 373 (1957) for testing. The heartwood and sapwood proportions were evaluated and the samples were examined for hardness, bending strength (MOE and MOR), compression strength parallel to grain, shear strength parallel to grain, and air-dry density. All trees had a significantly higher heartwood than sapwood percentage. The air-dry density values at 12% MC were 868 kg/m3, 806 kg/m3, 695 kg/m3 and 564 kg/m3 for four sections of the stem (heights 0-25%, 26-50%, 51-75% and 76-100%). In general, the plantation grown Albizia lebbeck exhibited favourable strength values, suggesting that it is endowed with adequate properties for being an alternative species to supply the wood industry.