%0 Journal Article
%T Gamma Irradiation of in-Shell and Blanched Peanuts Protects against Mycotoxic Fungi and Retains Their Nutraceutical Components during Long-Term Storage
%A Adriano Costa de Camargo
%A Thais Maria Ferreira de Souza Vieira
%A Marisa Aparecida Bismara Regitano-d¡¯Arce
%A Severino Matias de Alencar
%A Maria Antonia Calori-Domingues
%A Marta Helena Fillet Spoto
%A Solange Guidolin Canniatti-Brazaca
%J International Journal of Molecular Sciences
%D 2012
%I MDPI AG
%R 10.3390/ijms130910935
%X 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 (¡ãHue). 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, ¦Ø9) and 37.10% and 37.63% (C18:2, ¦Ø6). The total phenolics (TP) were 4.62 and 2.52 mg GAE/g, with antioxidant activities (AA) of 16.97 and 10.36 ¦Ìmol 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.
%K gamma radiation
%K storage
%K mycotoxic fungi
%K color
%K water activity
%K nutraceuticals
%K polyunsaturated fatty acids
%K polyphenols
%K antioxidant properties
%U http://www.mdpi.com/1422-0067/13/9/10935