Identification and characterization of a new iridoid compound from two-phase Chemlali olive pomace

Abstract

From ethyl acetate fraction of olive pomace, solid residue from olive oil extraction, a new compound was isolated and purified through solid-phase extraction using silica Cartridge column chromatography. The structure of the new compound was established as a deoxyloganic acid lauryl ester by spectroscopic data including one-and two-dimensional NMR, electrospray ionization mass spectrometry, infrared analysis and UV spectra. The antioxidant activity of the purified compound was evaluated by measuring the radical-scavenging effect on 2,2-diphenyl-1-picrylhydrazyl and by using the ferric reducing antioxidant power assays. The pure compound has not been previously identified in the genus Olea and could be used as for studying the biosynthetic pathway of oleuropein aglycon.

Recovery of Hydroxytyrosol Rich Extract from Two‐Phase Chemlali Olive Pomace by Chemical Treatment

“…The solvent gradient started with 20% B and increased to 50% in 30 min, followed by an isocratic plateau for 5 min. Finally, solvent B decreased to 20% until the end of running time (Rigane and others 2011; 2012). The injection volume was 20 μL.…”

Ultrasound Technology Parameters: Effects on Phenolics in Olive Paste and Oil in Relation to Enzymatic Activity

“…The contents of these compounds would result from the hydrolysis of their glucosidic and conjugated forms. Indeed, there are many sources of simple phenols in olive, such as hydroxytyrosol‐4‐β‐D‐glucoside, nuzhenide, oleuroside, verbascoside, demethyloleuropein, and oleuropein as the major component and others . HPLC quantitative analysis revealed an increase in the 3,4‐DHPEA and 3.4‐DHPEA species content with the increasing of ultrasound processing time on Tunisian olive paste cultivars (samples with pits).…”

“…After incubation for 30 min at room temperature, the absorbance was measured at 765 nm. The results were expressed in milligram of gallic acid equivalents (GAE) per kg of oil …”

“…It is native to tropical and a warm temperate region of the world and it is one of the oldest known cultivated plants. The tree is usually distributed in the coastal regions of the eastern Mediterranean basin, the neighboring areas of south‐western Europe, western Asia, Arabian Peninsula, India, Asia, northern Africa as well as northern Iran at the south end of the Caspian Sea, new producer countries located in America and in Australia …”

A holistic engineering approach for utilization of olive pomace

“…A great amount of residues are generated as a result of agro-industrial activities and biomass valorization has become imperative [1][2][3]. One of the most abundant one is olive pomace which is a by-product of olive oil production process and a very important biomass source for the Mediterranean countries.…”