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| Tavares,Luciana Lopes; Almeida,Crislene Barbosa de; Caruso,Ícaro Putinhon; Cornélio,Marinônio Lopes; Lopes Filho,José Francisco. |
| The purpose of this study was to evaluate changes in the structure and some functional properties of biofilms added with modified clays (Cloisite® 15A and Cloisite® 30B) prepared by the casting method. The analysis of the microstructure of the films, scanning electron microscopy (SEM), Optical microscopy (MO), and Infrared Spectroscopy (FTIR) indicated that the addition of clay in the films resulted in the formation of a heterogeneous microstructure, microcomposite or tactoid. Due to the formation of a microcomposite structure, functional properties of the films added with both clays such as opacity, solubility, and permeability to water vapor (PVA), were not better than those of the control film. Thus, it was concluded that although it is possible to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biofilms; Zein; Clays; Microcomposite; Tactoids. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612012000200017 |
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| Gloria,Eduardo Micotti da; Ciacco,César Francisco; Lopes Filho,José Francisco; Ericsson,Cynthia; Zocchi,Silvio Sandoval. |
| The distribution of the aflatoxin contamination was studied among four maize fractions, separated according to Brazilian grading rules for maize. The fraction that contained fermented, moldy, heated and sprouted grains normally had the highest levels of aflatoxin. However, the fraction contribution to the whole sample contamination level took into account the contamination fraction level and its weight to the whole sample. Considering this, the fraction that contained insect damaged, hollow, up to ¼ fermented and grains damaged by other causes was normally the fraction responsible for the total contamination level in the samples. Nevertheless, the fraction contributions were variable from sample to sample. Therefore, in conclusion, it was not possible to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aflatoxin; Contamination; Distribution; Grain type; Maize. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612004000100014 |
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| Gomes,Maron Stanley Silva Oliveira; Polachini,Tiago Carregari; Lopes Filho,José Francisco; Romero,Javier Telis. |
| ABSTRACT Equilibrium moisture data from the powdered pulp of Spondias mombin, L., both with and without additives - 58% maltodextrin (MD) or 58% gum arabic (GA) - were determined at 20, 30, 40 and 50 °C, using the static gravimetric method for a water activity range of 0.06 to 0.90. The resulting isotherms were sigmoidal and typical Type III, with the Guggenheim-Anderson-de-Boer model (GAB) adjusted to the experimental data for equilibrium moisture vs water activity. The addition of additives was shown to affect the isotherms in such a way that, for the same water activity, samples of CP+GA and CP+MD showed a lower equilibrium moisture content and were not affected by the variations in temperature. The isosteric heat of sorption for the cajá powder with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Isotherms; Maltodextrin; Gum arabic Water activity. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000400584 |
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