Extraction of bacaba (&lt;em&gt;Oenocarpus bacaba&lt;/em&gt;) oil with supercritical CO&lt;sub&gt;2&lt;/sub&gt;: Global yield isotherms, fatty acid composition, functional quality, oxidative stability, spectroscopic profile and antioxidant activity

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Abstract

Bacaba is widely consumed by the Amazonian population, and is promising for the production of cooking oil. The objective of this research was to determine the parameters of bacaba oil extraction with supercritical CO2: the fatty acid composition, functional quality, oxidative stability, spectroscopic profile and antioxidant activity of the extracted oil. Extractions of bacaba (Oenocarpus bacaba) oil were performed with supercritical CO2 at temperatures of 40 and 60 ºC, with pressures varying from 120 to 420 bar. The highest mass yield was 60.39 ± 0.72% on a dry basis, obtained in the isotherm of 60 °C and 420 bar. Oleic acid was the major compound. The Infrared spectroscopic profile showed the predominance of unsaturated fatty acids. The results indicate that bacaba oil presents good functional quality.

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Ying Zhong, Fereidoon Shahidi (2010)

Lipids are a major component of food and important structural and functional constituents of cells in biological systems. However, this diverse group of substances is prone to oxidation through various pathways. Their oxidative stability depends on a number of intrinsic and extrinsic factors, including the unsaturation of their fatty acids, composition of minor components, environment conditions, delivery techniques and use of antioxidants, among others. Lipid oxidation has detrimental effects on both food quality and human health, and efforts must be made to minimize oxidation and improve oxidative stability of lipid products. Antioxidant strategy has been successfully employed in the food industry for quality preservation of the food products and in the medicinal industry for risk reduction of numerous oxidative stress-mediated diseases. This tutorial review will provide important knowledge about lipid oxidation, including the mechanism and factors involved in oxidation, as well as strategies for improving oxidative stability of lipids.