Physicochemical and fatty acid profile of egusi oil from supercritical carbon dioxide extraction

Olubi, Olakunbi; Felix-Minnaar, Joseline Veronica; Jideani, Victoria A.

doi:10.1016/j.heliyon.2018.e01083

Cited by 27 publications

(18 citation statements)

References 36 publications

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“…In addition, cold maceration with n-hexane has been tried [6]. While on the healthy side, C. lanatus oil has been extracted using supercritical carbon dioxide [16], and with water [8]. Also, the effect of operating conditions on the mechanical expression of oil from Citrullus vulgaris has been studied [17].…”

Section: Further Background To the Studymentioning

confidence: 99%

The untapped industrial crop, Cucumeropsis mannii: dry oil extraction, characterization and potential use as biodiesel feedstock and heavy metal sink

Okwundu

Chiama

et al. 2021

Sustain Environ Res

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Due to the quest to meet a basic need – food, vast potentials of numerous African crops have remained unexplored. Cucumeropsis mannii, an invaluable West African melon, is cultivated for its edible proteinous oil-rich seeds. Here, we report for the first time, its potential use for biodiesel production over an uncommon heterogeneous nanocatalyst, and for wastewater treatment. An identification of the untapped species’ seed was made, for disambiguation. Oil (CMO) was expressed from the C. mannii seeds (CMS) and characterized. The CMS was found composed of 53.5% lipids, while 46.1% of the full-fat CMS flour was recovered as vegetable oil. Transesterification experiments were performed using a specially-prepared heterogeneous nanocatalyst derived from Eobania vermiculata shells, by varying successively: methanol/oil ratio, temperature, and reaction time. Maximum biodiesel (CMOME) yield of 86.2% was achieved at catalyst concentration of 5.4%, methanol to oil molar ratio of 9:1, reaction temperature of 60 °C, after 3 h of reaction. Furthermore, part of the polyunsaturated CMO was sulphur-functionalized and utilized at different dosage levels for extraction of Ag+ from 600 to 1500 ppm simulated water. The modified CMO exhibited desirable sorption properties – sinking 100% of Ag+ from 900 ppm water, after 7-h-phase-contact at 6.9 g (20 mL)− 1 dosage. Stagewise operation (multi-staging) was found capable of improving the extraction efficiency in highly concentrated wastewater. Although CMOME conformed to EN-14214 and ASTM D-6751 standards, it had low oxidation stability; making wastewater treatment a more faithful application. Regarding the crop’s food value, residual CMS cake remained edible, even with longer shelf-life (relative to the full-fat flour) – encouraging commercial flour-defattening and consequent availability of CMO for industrial applications. Lastly, it was concluded (with some relevant recommendations) that CMO has great potentials for use as biodiesel feedstock and as heavy metal removal agent.

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Section: Further Background To the Studymentioning

confidence: 99%

The untapped industrial crop, Cucumeropsis mannii: dry oil extraction, characterization and potential use as biodiesel feedstock and heavy metal sink

Okwundu

Chiama

et al. 2021

Sustain Environ Res

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“…As seen in Figure a, the acid value increases with increasing temperature and extraction pressure values (>200 bar) for shorter extraction times. High extraction temperature and extraction pressure resulted in the extraction of a higher amount of free fatty acids (Olubi, Felix‐Minnaar, & Jideani, ), and a higher acid value. The % FFAs displayed a similar trend, as presented in Figure b.…”

Section: Resultsmentioning

confidence: 99%

“…An iodine value is used to determine the unsaturated fatty acid content (Igwenyi & Akubugwo, 2010;Olubi et al, 2019). A higher content of unsaturated fatty acids indicates a higher iodine value.…”

Section: F I G U R Ementioning

confidence: 99%

Physicochemical properties and antioxidant activity of oil extracted from Assam tea seeds (Camellia sinensisvar.assamica) by supercritical CO₂extraction

Muangrat

Jirarattanarangsri

2020

J Food Process Preserv

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Response surface methodology (RSM), based on a central composite design, was used to simultaneously predict the optimal condition for oil extraction of Assam tea seeds via supercritical CO2 extraction method. The established regression mathematical model oil extraction was good enough for the prediction of experimental results (e.g., crude oil yield). The optimized extraction condition (50°C under 220 bar for 4 hr) providing the best quality of oil has high percentage of crude oil yield and oil recovery, low values of acid, free fatty acids, peroxide, and thiobarbituric acid reactive substances (TBARS), high values of iodine and saponification, and high phenolic content and low values of DPPH (IC50) and ABTS (IC50). Flavonoid, tannin, and saponin were detected in the extracted oil samples. In addition, major fatty acids in the extracted oil were oleic, linoleic, and palmitic acids. Practical applications Supercritical CO2 extraction can potentially be used for the extraction of oil from Assam tea seeds (Camellia sinensis var. assamica), providing a high oil yield. Assam tea seed oil obtained by supercritical CO2 extraction had a high antioxidant activity. The main fatty acids were oleic acid, linoleic acid, and palmitic acid. The obtained oil contained flavonoids, tannins, and saponins and is, therefore, a potential source of active and functional compounds used in the food industry, the production of food supplements and the pharmaceutic and cosmetic industries.

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“…So the aim is to come up with a method that yield oil of lower IA and IT values after its use for frying. The nutritional quality of blended oil used for both frying methods (conventional and vacuum) were assessed based on the fatty acid composition (of fresh and blended oil obtained after frying) for IA (relating to pro‐ and anti‐atherogenicity) and IT (relating to pro‐ and anti‐thrombogenicity) (Maia et al., 2019; Olubi, Felix‐Minnaar, & Jideani, 2019).…”

Section: Resultsmentioning

confidence: 99%

Effect of vacuum frying on quality attributes of pear ( Pyrus communis L) chips and blended oil

Juvvi

Selvi

Debnath

2020

J Food Process Preserv

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Standardization of various parameters during vacuum frying of pear slices and the effect of vacuum frying on blended oil (Palmolein and Sesame oils, 60:40) were studied. Oil samples were evaluated after an alternative vacuum frying of 20 consecutive cycles. Results showed that optimum vacuum frying conditions were temperature 110°C, vacuum 74–98 mbar, and time 4.0–4.2 min that produced pear chips with moisture content ≤2.04%, oil uptake ≤21.73%, breaking force ≤6.79N, color L* ≤64.31, a* ≤4.81, b* ≤29.76, and whiteness index ≤54.29, whereas conventionally fried chips contain moisture content 1.03% wt/wt, oil uptake 44.83%, breaking force 11.23N, color L* 21.84, a* 6.83, b* 11.67, and whiteness index 20.68. The peroxide value, free fatty acids, atherogenicity, and thrombogenicity index of oil obtained after vacuum frying (≤5.28, ≤2.84, ≤0.57, and ≤ 1.08, respectively) were found to be lower than conventional frying (10.83, 3.70, 0.59, and 1.11, respectively) indicating better quality of blended oil. Practical applications Vacuum frying employed in the present study resulted in reduced fat pear chips with retention of quality of frying medium as compared to conventional frying. This novel approach could be a feasible, economical process for food processing industries for the production of low‐fat pear chips that prolong the shelf‐life of frying medium.

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Physicochemical and fatty acid profile of egusi oil from supercritical carbon dioxide extraction

Cited by 27 publications

References 36 publications

The untapped industrial crop, Cucumeropsis mannii: dry oil extraction, characterization and potential use as biodiesel feedstock and heavy metal sink

The untapped industrial crop, Cucumeropsis mannii: dry oil extraction, characterization and potential use as biodiesel feedstock and heavy metal sink

Physicochemical properties and antioxidant activity of oil extracted from Assam tea seeds (Camellia sinensisvar.assamica) by supercritical CO₂extraction

Effect of vacuum frying on quality attributes of pear ( Pyrus communis L) chips and blended oil

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Physicochemical and fatty acid profile of egusi oil from supercritical carbon dioxide extraction

Cited by 27 publications

References 36 publications

The untapped industrial crop, Cucumeropsis mannii: dry oil extraction, characterization and potential use as biodiesel feedstock and heavy metal sink

The untapped industrial crop, Cucumeropsis mannii: dry oil extraction, characterization and potential use as biodiesel feedstock and heavy metal sink

Physicochemical properties and antioxidant activity of oil extracted from Assam tea seeds (Camellia sinensisvar.assamica) by supercritical CO2extraction

Effect of vacuum frying on quality attributes of pear ( Pyrus communis L) chips and blended oil

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Physicochemical properties and antioxidant activity of oil extracted from Assam tea seeds (Camellia sinensisvar.assamica) by supercritical CO₂extraction