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| TURAN,Ali; KARAOSMANOĞLU,Hasan. |
| Abstract This research was conducted to determine the chemical traits of Ordu Levant hazelnuts that were dried with sun–drying [on concrete ground (CG), grass ground (GG)], or in drying machine (DM) during 24 months of storage (2014-2016) at 20-25 °C and 70-90% relative humidity. Drying process continued 39 h for CG and GG, and 23 h for DM. Sun–drying were performed in similar sunshine and environmental conditions. Nut quality traits in protein, lipid, moisture contents, water activity, free fatty acids (FFA), peroxide value (PV), rancimat value (RV), and amount of aflatoxin were investigated during storage. The lowest FFA (0.35%, oleic acid) was recorded for GG, and the lowest PV (0.35 meqO2 kg–1 ) was recorded for CG. In addition, DM method contained... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aflatoxin; Concrete ground; Drying machine; Free fatty acid; Peroxide value; Rancimat value. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000600406 |
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| Caetano,Ana Carla da Silva; Araújo,Cristiane Rodrigues de; Lima,Vera Lúcia Arroxelas Galvão de; Maciel,Maria Inês Sucupira; Melo,Enayde de Almeida. |
| This study was carried out to evaluate the antioxidant capacity of the agro-industrial waste from acerola. Hydroacetone, hydroethanolic, and hydromethanolic extracts were obtained using the sequential extraction process, and they were screened for their free radical DPPH (1,1-diphenyl-2-picrilhidrazil) and ABTS+ (2,2'-azino-bis-(3-etilbenzotiazolin 6-sulfonic acid) scavenging activity and their effect on the linoleic acid peroxidation by the ferric thiocyanate method. Soybean oil with the addition of the extracts (200 ppm) was submitted to Schaal oven test (60 °C, 28 days), in which the samples were analyzed for peroxide value and conjugated dienes. Hydroethanolic and hydromethanolic extracts exhibited good DPPH scavenging activity (low value of EC50 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant; DPPH; ABTS; Ferric thiocyanate; Peroxide value; Conjugated dienes; Acerola fruit waste. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612011000300034 |
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| JAIMEZ-ORDAZ,Judith; PÉREZ-FLORES,Jesús Guadalupe; CASTAÑEDA-OVANDO,Araceli; GONZÁLEZ-OLIVARES,Luis Guillermo; AÑORVE-MORGA,Javier; CONTRERAS-LÓPEZ,Elizabeth. |
| Abstract In food systems, lipid oxidation is one of the most important factors affecting food quality, nutrition, safety, color and consumer acceptance. The objective of this study was to determine the kinetic parameters of lipid oxidation and its influence in the shelf life of third generation (3G) snacks stored in three types of packaging (polyethylene, polypropylene + Kraft paper, and polyethylene + polypropylene) at 25 °C and 40 °C. The peroxide value was the quality parameter selected and monitored for a 60 day period using a spectrophotometric technique. Based on the Arrhenius equation and activated complex theory, reaction rate constants (k), activation energies (Ea), Q10 factors, activation enthalpies (∆H‡), and activation entropies (∆S‡ ) for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Shelf life; 3G snacks; Peroxide value; Packaging materials; Kinetic analysis. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000500136 |
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