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| COSTA, D. A. da; ÁLVARES, V. de S.; KUSDRA, J. F.; NOGUEIRA, R. M.; MACIEL, V. T.; MIQUELONI, D. P.. |
| The natural drying of in-shell Brazil nuts carried out by the extractivists is not effective in reducing contamination by aflatoxin-producing fungi. Thus the use of an artificial heater could prove to be a favourable method to bring about a rapid reduction in the moisture content of the nuts and thereby prevent fungal growth. Hence the objective of this study was to evaluate the efficiency of a natural convection-type drier with respect to the physical, physicochemical and microbiological quality of nuts after drying for 6 hours at 45 °C. A random block experimental design with two treatments (nuts before and after drying) was used, using 10 replications of 3 kg. The nuts were analysed for their moisture, ash, protein, dietary fibre, total carbohydrates... |
| Tipo: Artigo de periódico |
Palavras-chave: Castanha do brasil; Convecção natural; Natural convection; Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Nuez del Brasil; Micotoxinas; Madera tropical; Cáscaras de fruta; Calidad de la fruta; Aflatoxinas; Temperatura de secado.; Secadores de convección; Essência florestal; Castanha do pará; Bertholletia excelsa; Fruto; Qualidade; Casca; Propriedade físico-química; Secagem artificial; Resistência a temperatura; Contaminação fúngica; Aspergillus flavus; Micotoxina; Aflatoxina; Tropical wood; Brazil nuts; Fruit quality; Fruit peels; Fungi; Drying temperature; Convection dryers; Mycotoxins; Aflatoxins.. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1074178 |
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| MIRELES-ARRIAGA,Ana Isabel; RUIZ-LÓPEZ,Irving Israel; HERNÁNDEZ-GARCÍA,Pedro Abel; ESPINOSA-AYALA,Enrique; LÓPEZ-MARTÍNEZ,Leticia Xóchitl; MÁRQUEZ-MOLINA,Ofelia. |
| Abstract The effect of thin-layer drying temperature on color, phenolic content and antioxidant capacity of noni slices was investigated. Noni slices were air-dried at 50, 60 and 70 °C under natural convection conditions. Drying curves were fitted to thin-layer drying models in order to evaluate the drying characteristics of the product. In addition, an unsteady-state diffusion equation was numerically solved considering both product shrinkage and a variable mass Biot number in boundary condition to accurately estimate water diffusivity in a process with external resistance to mass transfer. Results revealed that the Aghbashlo model accurately reproduced the experimental behavior. As expected, water diffusivities, corrected for shrinkage, increased with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidants; Natural convection; Noni drying. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612016000400583 |
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