Effects of the Reactive Moiety of Phenolipids on Their Antioxidant Efficiency in Model Emulsified Systems

• Type: Article in International Scientific Journal
• Date: 2021

Authors

Costa, M (Author) Other; Losada Barreiro, S (Author) Other; Magalhaes, J (Author) Other; Monteiro, LS (Author) Other; Bravo Diaz, C (Author) Other; Fatima Paiva Martins (Author) FCUP

Journal

Title: Foods

Vol. 10

Final page: 1028

Publisher: MDPI

Indexing

ISI Web of Knowledge - 3 Citations

Scopus - 3 Citations

Other information

Authenticus ID: P-00T-WP1

DOI: 10.3390/foods10051028

Abstract (EN): Our previous research was focused on the effects of hydrophobicity on the antioxidant (AO) efficiency of series of homologous antioxidants with the same reactive moieties. In this work we evaluate the antioxidant efficiency of hydrophobic phenolipids in 4:6 olive oil-in-water emulsions, with different phenolic moieties (derived from caffeic, 4-hydroxycinnamic, dihydrocaffeic acids, tyrosol and hydroxytyrosol), with alkyl chains of 8 and 16 carbons, and compare the antioxidant efficiency with that of the parent compounds. All catecholic phenolipids, in particular the C8 derivatives, have proven to be better antioxidants for the oxidative protection of emulsions than their parental compounds with octyl dihydrocafffeate being the most efficient (16-fold increase in relation to the control). To understand the importance of some factors on the antioxidant efficiency of compounds in emulsions, Pearson's correlation analysis was carried out between antioxidant activity and the first anodic potential (E-pa), reducing capacity (FRAP value), DPPH radical scavenging activity (EC50) and the concentration of antioxidants in each region of the emulsified system. Results confirm the importance of the effective concentration of AOs in the interfacial region (AO(I)) (rho = 0.820) and of the E-pa (rho = -0.677) in predicting their antioxidant efficiency in olive oil-in-water emulsions.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 16