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Journal of Applied Sciences
Year: 2007  |  Volume: 7  |  Issue: 6  |  Page No.: 835 - 840

Physical Properties of Oils Extracted from Some Nigerian Non-Conventional Oilseeds

J.A.O. Oyekunle, A.A. Omode and J.O. Akinnifesi    

Abstract: Oils extracted from Cucumeropsis edulis, Hevea brasiliensis (Para rubber), Hura crepitans (Sound box tree), Jatropha curcas (Physic nut), Khaya ivorensis (Lagos Mahogany) and Citrus sinensis (sweet orange) were assessed for such characteristic physical properties as colour, flavour (odour and taste), specific gravity, viscosity, dielectric constant, surface tension and refractive index. Specific gravity measurement varied between 0.9004-0.9113 at 80°C and 0.9125-0.9207 at 30°C. Viscosity measurement, in centipoises, ranged between 7.35-9.41 at 80°C and 38.44-60.34 at 30°C. Dielectric constant values varied between 1.63-3.88 within the temperature range of 26-80°C. Surface tension values at 28.5°C were between 0.03492-0.03616 m-1 and refractive index values at 28°C lied between 1.46469 and 1.47072. The findings revealed the usefulness of the oils in electric voltage transformers and for impregnation in paper capacitor.

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