Abstract
The Nkamba nut (<em>Ricinodendron africanum</em> var Nkamba), named <em>Kingoma-ngoma</em>, a member of Euphorbiaceae yield 67% of oil when extracted with soxlhet using hexane as solvent. The crude oil is rich in C18:1 (19.48%); C18:2 (39.44%) and C18:3 (31.63%). The behavior of oil is investigated when heated at 100°C and/or stored 4 years at room temperature. The oxidation was appreciated by chemical indices or photospectrometrically (K232/270). The Totox value grew up from 5.33 in freshly extracted oils to 87.46 for aged oils. The level of hydroperoxides show a great amount of absorbance (0.857) for the primary byproducts in fresh oil heated. In the aged oils, there was a great level of ended byproducts up to 17.78. The fatty acid profile is modified with an amount of elaidic acid (0.0064 to 12.4%) and the strong decrease of the linolenic acid rate (31.63 to 1.07%). The thermogramm shows a peak of -27.1°C which is deplace to -15.1°C by progressive saturation of double bonds. Despite of natural antioxidants content, Nkamba nut oil is hardly oxidized in 4 years and then became unusual to human consumption.
Highlights
The Ricinodendron africanum var Nkamba; named kingoma-ngoma in the south west of DR Congo, belongs to the family of the Euphorbiaceae
The Nkamba nut oil is rich in PUFA
The level of hydroperoxides show a great amount of absorbance (0.857) for the primary byproducts in fresh oil heated
Summary
The Ricinodendron africanum var Nkamba; named kingoma-ngoma in the south west of DR Congo, belongs to the family of the Euphorbiaceae. The oils extracted from Nkamba nuts are rich in PUFA They contained 19.48% of C18:1; 31.63% of C18:3 and 39.44% of C18:2 (Dzondo-Gadet et al, 2014b). Lipid oxidation of oil contained PUFA-rich foods is a serious problem that leads to loss of shelflife, consumer acceptability, functionality, nutritional value and safety. It affects the quality and nutritional value of foods (Dacaranhe and Terao, 2001). The presence of fatty acid oxidized products, like the aldehydes have been implicated in aging, mutagenesis and carcinogenesis (Kampa et al, 2007) These aldehydes like Malondialdehyde (MDA) or 4Hydroxy-2-Nonenal (4-HNE) are very toxic by their ability to crosslink to proteins and bind covalently to nucleic acids (Nair et al, 1986)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
