Browsing by Author "Nusirat Aderinsola Sadiku"

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    Basic Working Stress for Naturally Grown Bamboo (Bambusa vulgaris)
    (Kerela Forestry Research Institute, India, 2020-03-27) Nusirat Aderinsola Sadiku; Amos Olujide Oluyege; Babatunde Ajayi; Saka Obafemi Bada
    Classification of Bambusa vulgaris for structural application was carried out based on the maximum crushing strength perpendicular and parallel to the grain of the culm as well as bending moduli of rupture (MOR) and elasticity (MOE). The findings of the work showed that the MOR > 70 N/mm2, MOE > 9000 N/mm2 and compression strength > 35 N/mm2. Following the standard classification of timber species for structural use in building, B. vulgaris is placed in group one as the strength properties surpassed the standard stress limit required for structural application. The basic density of B. vulgaris falls in the range of 755.22 to 877.23 kg/m3 which is comparable to most bamboo as well as heavy tropical wood species used in construction. The overall specific strength properties of B. vulgaris were somewhat higher than and comparable to most timber species used in construction.
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    Evaluation of the Bio-chemical Markers in Selected Edible Wood Rotting Macrofungi
    (Forestry Association of Nigeria, 2024-05-11) Nusirat Aderinsola Sadiku; Sunday Ademola Laba; Azeez Adebola Lateef; Edidiong Umoren; Isiaka Babatunde Sadiku
    The search for natural products that has therapeutic properties with little or no side effects has been the main subject around the world. Different plants have been and are being explored for their medicinal properties. However, higher fungi remain a vast and a large source of new pharmaceutical products yet to be explored. The phyto-constituents in the ethanolic extract of Six edible wood rotten fungi were investigated by Gas Chromatography-Mass Spectrometry (GC-MS) analysis. The results showed that a total of 25 phyto-constituents were revealed in Ganoderma lucidum and Pleurotus florida while 17 compounds were revealed in Pleurotus eryngii and Pleurotus pulmonarius. Pleurotus ostreatus and Pleurotus sajor-caju recorded 31 and 30 phyto-constituents respectively. Some constituents were common to all the fungi while some were absent in some fungi. Generally, most of them occurred in trace amount while a few of the constituents occurred in large amount. Some bioactive compounds such as Methyl stearate, Hexadecanoic acid, methyl ester, (Z)-, Hexadecanoic acid, ethyl ester, 11,14-Octadecadienoic acid, methyl ester and 9-Octadecenoic acid methyl ester were common to all the fungi extract. Four of the fungi had cholesterol content which was however in trace amount of 1.37%, 1.22%, 1.16% and 0.68% for G. lucidum, P. eryngii, P. ostreatus and P. pulmonarius respectively. Of the compounds, 9-Octadecenoic acid, methyl ester, (E)- had the highest concentration of 35.08% in P. pulmonarius. This was closely followed by 11,14-Octadecadienoic acid methyl ester also in P. pulmonarius. Although, the concentration varied across the fungi extracts. The bio-active components in these fungi species could serve as a lead for development of novel natural products with therapeautic properties.
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    Technical Rotation age for Naturally-Grown Bambusa vulgaris for Fuelwood, Fibre and Structural Application
    (Forest and Forest Poduct Society, 2016-10-12) Nusirat Aderinsola Sadiku; Adeyemi Iyiola Ebenezer; Olayiwola Yetunde Bolarinwa
    Basic properties of Bambusa vulgaris from different ages were examined to determine the optimum technical growth rotation for fuelwood, source of fibre and structural application. Bamboo culm samples aged 2, 3 and 4 years were taken from naturally growing bamboo stock in the Campus of the Federal University of Technology, Akure, Nigeria. The density, porosity, shrinkage, swelling, fibre morphology and derived fibre values obtained from the geometry of the fibre, the fuel, chemical as well as the strength properties were determined. All the tests were conducted following the standards of Technical Association of Pulp and paper Industry (TAPPI) and American standard for testing materials (ASTM). The results showed that the maximum density (877.23Kg/m3) was attained at age 3 while the minimum culm density of age 2 (755.22Kg/m3) is slightly above the minimum wood density requirement of pulp industry. No significant variations existed in the extractive content, fuel properties, fibre dimensions and the derived values among ages. However, significant variation existed in porosity, density, holocellulose, α – cellulose, hemicelluloses and lignin content among ages. The silica content and all the mechanical properties varied significantly among ages except compression strength perpendicular to grain. By considering the basic characteristics of Bambusa vulgaris at different ages, the recommended optimum technical rotation age for cellulosic fibre production is 2 years, for structural application age 3 - 4 is considered the harvesting age as the density and strength start decreasing after age 3 except MOE while culms may be harvested for fuelwood at any age as it is not necessary to use matured culm.