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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Antioxidative and prooxidative effects in food lipids and synergism with alpha-tocopherol of acai seed extracts and grape rachis extracts

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Author(s):
Melo, Priscilla Siqueira ; Rodrigues Arrivetti, Leandro de Oliveira ; de Alencar, Severino Matias ; Skibsted, Leif H.
Total Authors: 4
Document type: Journal article
Source: Food Chemistry; v. 213, p. 440-449, DEC 15 2016.
Web of Science Citations: 16
Abstract

Extracts of acai seed and of grape rachis alone or in combination with a-tocopherol were evaluated as antioxidants in (i) bulk soybean oil, (ii) soybean oil liposomes and (iii) soybean-oil/water emulsions. The extracts made with 57% aqueous ethanol showed an antioxidant activity not dependent on concentration for grape rachis extracts and a concentration-dependent prooxidative activity for acai seed extracts in bulk soybean oil. Both the extracts, however, protected liposome suspensions and oil/water emulsions against lipid oxidation. Synergism was demonstrated when extracts were combined with a-tocopherol, effects explained by the solubility of extract components in the water-phase and of a-tocopherol in the lipid-phase. Phenolic profiling of the extracts by U-HPLC-ESI-LTQ-MS was used to identify active antioxidants. Acai seed and grape rachis extracts served as good sources of procyanidins and flavan-3-ols, imparted high antioxidant activity especially when combined with a-tocopherol and are suggested for protection of food oil/water emulsions. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 09/54040-8 - Acquisition of a high-resolution Orbitrap mass spectrometer for the discovery and structural analysis of biologically active compounds: applications in proteomics, biomarkers, synthesis, isolation, and characterization of natural products, studies of redox systems in food and enzymatic synthesis
Grantee:Emanuel Carrilho
Support type: Multi-user Equipment Program
FAPESP's process: 14/17786-0 - Antioxidant interaction between agroindustrial residues extracts and alfa-tocopherol against lipid peroxidation in soybean oil and colloidal systems
Grantee:Priscilla Siqueira Melo
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 11/12640-9 - Identification of natural antioxidants in agro-industrial residues: isolation and technological application in lipid-based food matrix
Grantee:Priscilla Siqueira Melo
Support type: Scholarships in Brazil - Doctorate