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Provedor de dados:  Repositório Alice
País:  Brazil
Título:  Physicochemical and antioxidant properties of the pequi (Caryocar brasiliense Camb.) almond oil obtained by handmade and cold-pressed processes.
Autores:  TORRES, L. R. O.
SHINAGAWA, F. B.
ARAÚJO, E. S.
OROPEZA, M. V. C.
MACEDO, L. F. L.
ALMEIDA-MURADIAN, L. B.
LIMA, H. C. de
MANCINI-FILHO, J.
Data:  2016-07-19
Ano:  2016
Palavras-chave:  Pequi
Propriedade fisico-química
Antioxidante
Óleo de amêndoa
Processo artesanal
Prensado a frio
Almond oil
Resumo:  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 α-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.

2016
Tipo:  Artigo em periódico indexado (ALICE)
Idioma:  Inglês
Identificador:  35477

http://www.alice.cnptia.embrapa.br/handle/doc/1049137

http://ainfo.cnptia.embrapa.br/digital/bitstream/item/145575/1/Torres-et-al-2016.pdf
Editor:  International Food Research Journal, v. 23, n. 4, p. 1541-1551, 2016.
Relação:  Embrapa Cerrados - Artigo em periódico indexado (ALICE)
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