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Comparison among different green extraction methods of polyphenolic compounds from exhausted olive oil pomace and the bioactivity of the extracts

2024-05Journal article Open access
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dc.contributor.authorMartins, Valter F. R.
dc.contributor.authorRibeiro, Tânia B.
dc.contributor.authorLopes, Ana I.
dc.contributor.authorPintado, Manuela E.
dc.contributor.authorMorais, Rui M. S. C.
dc.contributor.authorMorais, Alcina M. M. B.
dc.date.accessioned2024-05-23T09:55:30Z
dc.date.available2024-05-23T09:55:30Z
dc.date.issued2024-05
dc.description.abstractThe use of by-products as a source of bioactive compounds with economic added value is one of the objectives of a circular economy. The olive oil industry is a source of olive pomace as a by-product. The olive pomace used in the present study was the exhausted olive pomace, which is the by-product generated from the air drying and subsequent hexane extraction of residual oil from the olive pomace. The objective was to extract bioactive compounds remaining in this by-product. Various types of green extraction were used in the present study: solvent extraction (water and hydroalcoholic); ultrasound-assisted extraction; Ultra-Turrax-assisted extraction; and enzyme-assisted extraction (cellulase; viscoenzyme). The phenolic profile of each extract was determined using HPLC-DAD and the total phenolic content (TPC) and antioxidant activity (ABTS, DPPH, and ORAC) were determined as well. The results showed significant differences in the yield of extraction among the different methods used, with the enzyme-assisted, with or without ultrasound, extraction presenting the highest values. The ultrasound-assisted hydroethanolic extraction (USAHE) was the method that resulted in the highest content of the identified phenolic compounds: 2.021 ± 0.29 mg hydroxytyrosol/100 mg extract, 0.987 ± 0.09 mg tyrosol/100 mg extract, and 0.121 ± 0.005 mg catechol/100 mg extract. The conventional extraction with water at 50 °C produced the best results for TPC and antioxidant activity of the extracts. The extracts from the USAHE were able to inhibit Gram-positive bacteria, especially Bacillus cereus, showing 67.2% inhibition at 3% extract concentration.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.3390/molecules29091935pt_PT
dc.identifier.eid85192686875
dc.identifier.issn1420-3049
dc.identifier.pmcPMC11085311
dc.identifier.pmid38731426
dc.identifier.urihttp://hdl.handle.net/10400.14/45241
dc.identifier.wos001220073100001
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectAntimicrobial activitypt_PT
dc.subjectAntioxidant activitypt_PT
dc.subjectCellulasept_PT
dc.subjectOlive oil pomacept_PT
dc.subjectPhenolic compoundspt_PT
dc.subjectSolvent extractionpt_PT
dc.subjectUltra-Turrax extractionpt_PT
dc.subjectUltrasound extractionpt_PT
dc.subjectViscoenzymept_PT
dc.titleComparison among different green extraction methods of polyphenolic compounds from exhausted olive oil pomace and the bioactivity of the extractspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue9pt_PT
oaire.citation.titleMoleculespt_PT
oaire.citation.volume29pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT

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