| Full text | |
| Author(s): |
de Camargo, Adriano Costa
[1]
;
Ferreira de Souza Vieira, Thais Maria
[1]
;
Bismara Regitano-d'Arce, Marisa Aparecida
[1]
;
de Alencar, Severino Matias
[1]
;
Calori-Domingues, Maria Antonia
[1]
;
Fillet Spoto, Marta Helena
[1]
;
Canniatti-Brazaca, Solange Guidolin
[1]
Total Authors: 7
|
| Affiliation: | [1] Univ Sao Paulo, Luiz de Queiroz Coll Agr ESALQ USP, Dept Agrifood Ind Food & Nutr, BR-13418900 Piracicaba - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES; v. 13, n. 9, p. 10935-10958, SEP 2012. |
| Web of Science Citations: | 17 |
| Abstract | |
Peanut samples were irradiated (0.0, 5.2, 7.2 or 10.0 kGy), stored for a year (room temperature) and examined every three months. Mycotoxic fungi (MF) were detected in non-irradiated blanched peanuts. A dose of 5.2 kGy was found suitable to prevent MF growth in blanched samples. No MF was detected in in-shell peanuts, with or without irradiation. The colors of the control in-shell and blanched samples were, respectively, 44.72 and 60.21 (L {*}); 25.20 and 20.38 (Chroma); 53.05 and 86.46 (degrees Hue). The water activities (Aw) were 0.673 and 0.425. The corresponding fatty acids were 13.33% and 12.14% (C16:0), 44.94% and 44.92% (C18:1,omega 9) and 37.10% and 37.63% (C18: 2,omega 6). The total phenolics (TP) were 4.62 and 2.52 mg GAE/g, with antioxidant activities (AA) of 16.97 and 10.36 mu mol TEAC/g. Storage time negatively correlated with Aw (in-shell peanuts) or L {*}, linoleic acid, TP and AA (in-shell and blanched peanuts) but positively correlated with Aw (blanched peanuts), and with oleic acid (in-shell and blanched peanuts). Irradiation positively correlated with antioxidant activity (blanched peanuts). No correlation was found between irradiation and AA (in-shell samples) or fatty acids and TP (in-shell and blanched peanuts). Irradiation protected against MF and retained both the polyunsaturated fatty acids and polyphenols in the samples. (AU) | |
| FAPESP's process: | 09/18215-8 - Physico-chemical effects of gamma radiation on peanut (Arachis hypogaea L.) and the feasibility of the use of its skin as natural antioxidant |
| Grantee: | Solange Guidolin Canniatti Brazaca |
| Support type: | Regular Research Grants |