keywords: Afzelia bipindensis, phytochemical, functional group, tropical timber
The dearth of information on the wood stem of Afzelia bipindensis led to the evaluation of its chemical, physical, phytochemical and functional groups analysis. Some obtained results from physical and thermal analysis were as follows; oven dry density 51.4 x 10-2 g.cm-3, water imbibitions (at different intervals: 30 min 22.2%, 5 h 37% & 24 h 59.1%), thermal conductivity 26.31 x 102 Umoh/cm, electrical conductivity 5.0 x 10-3 Sm-1, afterglow time 49.33Sec, flame duration 181.33Sec, flame propagation rate 4.6 x 10-2 cm.S-1, ignition time 8.33Sec, moisture content 20.28% and ash content 1.74% showed that it is a good timber that could be suitable for various construction purposes. Phytochemical screening showed the presence of saponins, tannins, steroids, flavonoids, carbohydrates, proteins, resins, terpenoids, glycosides and alkaloids. The AAS of the sample showed the presence of some metals such as Na, K, Pb, Ca, Zn, Mg, As and Cu in the decreasing order of their concentrations. The Thin Layer Chromatographic analysis showed two spots for chloroform extract. It was further characterized using Fourier Transform Infrared and Ultraviolet Spectroscopic methods which suggested a 1,2,3- trisubstituted phenylamide with NH, CO and CN groups attached as the functional groups present. The chemical components analysis showed the presence of cellulose, hemicelluloses, lignin and other constituents in their right proportion. The results confirmed the effectiveness of the wood for various construction purposes and its medicinal ability due to the presence of all the analyzed secondary metabolites.
Akpuaka MU 2009. Essential of Natural Products Chemistry, Mason Publishers, Inc. Enugu Nigeria, pp. 34-65. American Society for Testing and Materials, 1999. Direct moisture content measurement of wood and wood-based materials. Designation D4442-99. West ssConshohocken, PA: ASTM. American Society for Testing and materials, 1998. Standard Test Methods for five tests of building construction and materials. Designation E119-98. West Conshohocken, PA: ASTM. Arbonnier, M. 2004. Trees, Shrubs and Lianas of West Africa Dry Zones, Vol. 1, Grad, Magrat Publishers, p. 574. Amadi BA, Agomuo EN & Ibegbulam CO 2004. Research Methods in Biochemistry, Supreme Publishers, Owerri, pp. 90-115. Association of Official Analytical Chemists 1990. Official Methods of Analysis. 15th Ed. Washington DC, USA. Arntzen CJ 1994. Wood Properties Encyclopedia of Agricultural Sciences. FI: Academic Press, Orlando, pp. 549-561. David WG, Jerrold EW & David EK 1999. Wood Handbook- Wood as an Engineering Material. Gen. Tech. Rep. FSL-GTR-113. Madison, W.I.: U.S. Department of Agricultural, Forest Service, Forest Products from Forest Product Laboratory, 463: 2-26. Desch HE & Dinwoodie JM 1996. Timber, its structure, properties, conversion and use, Macmillian Press Ltd, London, 7th Edition, pp 306. Desch HE & Dinwoodie JM 1981. Timber, its structure, properties and utilization, Macmillian Press Ltd, London, 6th Edition, pp. 155 – 208. Dunguid JP, Marmoid BP & Swain RHA 1989. Mackie and Maccartney’s Medical Microbiology 13th ed, Vol. 1. Churchill Livingstone London, p. 16. Eboatu AN & Altine AM 1991. Studies on the thermal characteristics of some tropical wood, Nig. J. Renewable Energy, 2(1): 49-53. Fahy E, Subramaniam S, Murphy R, Nishijima M, Raetz C, Shimizu T, Spener F, Van Meer G, Wakelam M & Dennis EA 2009. Update of the lipid maps: Comprehensive classification system for lipids. Journal of Lipid Research, 50: 59-514. Fatoki OD & Ekwenchi MM 1998. The Determination of oxalate contents of some Nigerian vegetables. Nig. J. Nutr. Sci., 2: 7-11. Gills LS 1992. Ethnomedical uses of plants in Nigeria UNIBEN Press, Benin City, pp. 36-42. Gérard J & Louppe D 2011. Afzelia bipindensis Harms. In: Lemmens, RHMJ, Louppe D & Oteng-Amoako AA (Editors). PROTA (Plant Resources of Tropical Africa/Ressources végétales de l’Afrique tropicale), Wageningen, Netherlands. Accessed 8 July 2016. Goering HD & Vansoest PJ 1975. Forage Fibre Analysis, Washington DC, US Dept of Agricultural Research Services, p. 23. Harbon JB 1998. Phytechemical Method 3rd Edition. Thomson Science 2-6 Boundary Row London, UK, pp. 1-290. Jackson R. 2012. Sailing through time Jewel of Muscat. Baneli Aranico World. Retrieved 26 July, 2012. Keay RWJ, Onochie CFA & Stanfield DP 1964. Nigeria Trees. Department of Forest Research Publishers Ibadan, 1: 38-265. Keay RWJ 1989. Trees of Nigeria. Clarendon Press Oxford, New York, pp. 179-181.