| Full text | |
| 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: | 14 |
| 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: | 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 Opportunities: | Scholarships in Brazil - Doctorate |
| 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 Opportunities: | Scholarships abroad - Research Internship - Doctorate |
| 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 Opportunities: | Multi-user Equipment Program |