Title
Physicochemical and antioxidant properties of the pequi (Caryocar brasiliense Camb.) almond oil obtained by handmade and cold-pressed processes
Date Issued
01 January 2016
Access level
metadata only access
Resource Type
journal article
Author(s)
Torres L.R.O.
Shinagawa F.B.
Santana F.C.
Araújo E.S.
Macedo L.F.L.
Almeida-Muradian L.B.
Lima H.C.
Mancini-Filho J.
Universidad de São Paulo
Publisher(s)
Universiti Putra Malaysia
Abstract
The aim of this study is to characterize physical and chemically and determine the antioxidant capacity of pequi almond oils (PAO) extracted by handmade and by cold-pressing. Both oils showed good quality by acid, peroxide and thiobarbituric acid values. The fatty acid (FA) profile showed a significant presence of monounsaturated FA, mainly oleic acid (53.48 to 55.41 %); saturated FA, such as palmitic acid (33.30 to 35.89 %); and polyunsaturated FA (PUFA), such as linoleic acid (5.85 to 7.23 %). The total phenolic (TP) and carotenoid content ranged in concentration from 87.56 to 392.00 mg GAE/100 g and 36.03 to 262.40 mg/100 g, respectively. The tocopherol and phytosterol results indicated the predominant presence of a-tocopherol (52 to 67 %) and stigmasterol (63 to 68 %). The antioxidant capacity of PAO as measured using the 2,2-diphenyl-1-picrylhydrazyl (DPPH•) method oscillated from 58.48 mg/mL to 76.46 mg/ mL (IC50), from 10.61 to 40.46 μmol TE/g by the 2,2'-azino-bis (3-ethylbenzothiazoline-6- sulphonic acid) (ABTS•+) method, and from 113.93 to 280.85 μmol TE/100 g and 164.49 to 277.86 μmol TE/100 g, by the lipophilic and hydrophilic oxygen radical absorbance capacity (ORAC) methods, respectively. The oils presented a good oxidative and thermal stability by Rancimat method (IP of 7.33 a 15.91 h) and curves thermogravimetric and differential scanning calorimetry (To 337-363 °C and 159-184 °C, respectively). The results confirmed the presence of compounds that conferred antioxidant capacity and oxidative and thermal resistance for PAO made by handmade or cold-pressing, indicating that these oils can potentially be used for food and non-food applications.
Start page
1541
End page
1551
Volume
23
Issue
4
Language
English
OCDE Knowledge area
Química física
Scopus EID
2-s2.0-84977564010
Source
International Food Research Journal
ISSN of the container
19854668
Sources of information: Directorio de Producción Científica Scopus