Fatty Acid Composition and Some Physicochemical Properties of Oils from Allanblackia gabonensis and A.stanerana Kernels

Abstract

The physicochemical properties and chemical composition of oils extracted from two varieties of mature seeds of Allanblackia gabonensis and A.stanerana were assessed. The physicochemical properties of oils from Allanblackia gabonensis and A. stanerana were respectively 5.35 and 22.023 % for the water content; 68.15 and 69.87 % for the extraction yield on a dry basis; 0.35 and 0.30 mg KOH/g oil for the acid index; 35.57 and 29.75 g of I2/100 g oil for the iodine index; 1.3740 and 1.4150 for the refractive index. The fatty acid profile of those oils showed respectively four saturated fatty acids 60.61 and 70.94 %, two monounsaturated fatty acids 37.46 and 28.22 %, two polyunsaturated fatty acids 0.82 and 0.81 % for Allanblackia gabonensis and A. stanerana oils respectively. In both cases, fatty acids C18:0 and C18:1 were dominant. Most of the physicochemical properties showed significant variation (P < 0.05) from one oil to other, the difference being insignificant (P > 0.05) between the two chemical compositions. The analysis of these characteristics showed interesting application features for these oils.

Cooking and Sun Drying Effects on Properties of Allanblackia stanerana Kernels’ Oil

“…For acid and iodine values, the model depicted interesting values for the oil quality. These values for the quality of the Allanblackia oil have been reported by Pengou et al [3].…”

“…RW ¼ 23:025 À 0:8908x 1 À 7:9757x 3 À 1:3888x 2 1 À 0:375x 1 x 3 þ 9; 0862x 2 3 The model has a determination coefficient higher than 70 % (see Table 2), suitable with the experimental design.…”

“…The Allanblackia genus produces seed containing a fat which is solid at room temperature. Its chemical composition [3] and its high melting point (35°C) makes the fat a valuable raw material that can be used without transformation to improve the consistency of margarines, cocoa butter substitutes and related products [4]. Previous works on the Allanblackia genus are on the phytochemicals order [5].…”

Oil yields for Allanblackia parviflora (tallow tree) in Ghana: the effects of oil extraction methods, tree morphology and environmental characteristics

“…Worldwide, commercial vegetable oil production has been from conventional crops such as soybean, sunflower, rapeseed, coconut, palm nut and shea butter (Sagi et al, 2013;Rosillo-Calle et al, 2009). The need to investigate the physical and chemical characteristics of new, unconventional sources of vegetable oils is necessary to evaluate their suitability as raw materials for food and industrial applications (Noumi et al, 2011;Pengou et al, 2013). In West Africa (Cameroon, Nigeria and Ghana), indigenous forest plants *Corresponding author.…”

“…Processing seeds with hulls may also impact further properties like the introduction of bioactive substances and fibre into the oils and seed cakes (Niewiadomski, 1990;Shafig and Din, 1997). The literature sourced on bulked Allanblackia kernels indicated a proximate composition of 62 to 70% of oil through soxhlet extraction (Noumi et al, 2011;Pengou et al, 2013) and not from seeds as is used by the commercial oil companies. Also, previous data by Sefah, Adubofour and Oldham (2010) indicated 48.6% at 100°C with 13% moisture content as the optimum conditions for oil yield from bulked Allanblackia kernels using the manual screw press.…”