Chemical Composition, Physical Properties, and the Oxidative Stability of Oil Bodies Extracted From Argania spinosa. (29th April 2018)

• Record Type: Journal Article
• Authors: Zaaboul, Farah; Raza, Husnain; Lazraq, Abderrahim; Deng, Boxin; Cao, Chen; Liu, Yuan F.
• Is Part Of: Journal of the American Oil Chemists' Society. Volume 95:Number 4(2018)
• Page Start: 485
• Page End: 495
• Publication Date: 2018-04-29
• Subjects: Argan oil bodies -- Aqueous extraction method -- γ‐Tocopherols -- Physical stability -- Preemulsified AOB -- Oxidative stability -- H‐oleosin; Oils and fats -- Periodicals; Soap -- Periodicals; Fats -- Periodicals; Food-Processing Industry -- Periodicals; Acides gras -- Périodiques; Aliments -- Industrie et commerce -- Périodiques; Huiles et graisses -- Périodiques; Savon -- Périodiques; Oliën; Chemie; Oils and fats; Soap; Periodicals; 547.77
• DOI: 10.1002/aocs.12053
• Languages: English
• ISSNs: 0003-021X

Abstract

Abstract: Oil bodies (OB) were extracted from argan kernels using an aqueous extraction method. The composition of OB revealed its lipid profile, which had a high content of stearic and palmitic acid. Besides, evidence suggested an association between OB and tocopherols. The physical properties of argan OB (AOB) showed that their size was around 1.9 μm and the ζ‐potential went from +17.7 mV at pH 2.0 to −32.25 mV at pH 8, with an isoelectric point around pH 5.1. OB were stable and small at pH 2.0, 7.0, and 8.0 but large near the pI. Additionally, AOB were stable against aggregation/coalescence even in high salt concentrations, and also against thermal processing (95 °C) with only a change in their interfacial properties. AOB emulsion showed interesting oxidative stability at different storage temperatures and heat treatment. Heat treatment and storage at low temperature preserved oleosins from degradation by the endogenous enzyme, and H‐oleosin 15 kDa resisted hydrolyzation even at a high storage temperature for 2 weeks.