Effect of treatment with alkaline hydrogen peroxide associated with extrusion on color and hydration properties of oat hulls
An incomplete factorial design with three independent variables at three levels of variation was used to evaluate the effect of the treatment with alkaline hydrogen peroxide concomitant with extrusion on some properties of oat hulls. The independent variables were hydrogen peroxide level, feed moist...
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| Format: | Article |
| Language: | English |
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Instituto de Tecnologia do Paraná (Tecpar)
2005-01-01
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| Series: | Brazilian Archives of Biology and Technology |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000100010 |
| _version_ | 1818303212852084736 |
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| author | Melicia Cintia Galdeano Maria Victória Eiras Grossmann |
| author_facet | Melicia Cintia Galdeano Maria Victória Eiras Grossmann |
| author_sort | Melicia Cintia Galdeano |
| collection | DOAJ |
| description | An incomplete factorial design with three independent variables at three levels of variation was used to evaluate the effect of the treatment with alkaline hydrogen peroxide concomitant with extrusion on some properties of oat hulls. The independent variables were hydrogen peroxide level, feed moisture and extrusion temperature. The dependent variables were water retention capacity (WRC), swollen volume (SV) and color. The analysis of variance showed that temperature was the most important variable for the hydration properties. The highest values of WRC and SV were obtained when oat hulls were processed in the condition of 7% hydrogen peroxide, 32% feed moisture and 90ºC extrusion temperature. Modified hulls had a WRC 70% higher and SV 55% higher than the untreated material. The instrumental measure of color was conducted to analyze the modifications promoted due to the treatment in this parameter. The highest value of brightness was obtained with 7% hydrogen peroxide. The modifications in the fibers were accompanied indirectly through hydration properties.<br>Um delineamento fatorial incompleto 3³ foi utilizado para estudar o efeito do tratamento com peróxido de hidrogênio alcalino associado à extrusão sobre algumas propriedades funcionais da fibra da casca de aveia. As variáveis do tratamento avaliadas incluíram teor de peróxido de hidrogênio (%), umidade da amostra (%) e temperatura de extrusão (ºC). A análise de variância (ANOVA) mostrou que a temperatura foi a variável mais importante para as propriedades de hidratação. Os maiores valores de capacidade de retenção de água (CRA) e volume de intumescimento foram obtidos na condição de 7% de peróxido de hidrogênio, 32% de umidade e 90ºC de temperatura, obtendo um incremento de 70% na CRA e 55% no volume de intumescimento. A medida instrumental de cor foi usada para analisar as modificações ocorridas neste parâmetro. O mais alto valor de luminosidade foi alcançado com maior nível de peróxido de hidrogênio (7%), obtendo-se, nessa condição, produtos mais claros. Ensaios realizados para controle mostraram que tanto a extrusão quanto o tratamento químico tiveram efeito nas propriedades avaliadas, e que o efeito conjunto foi superior ao de cada um isoladamente. As modificações ocorridas nas fibras foram acompanhadas indiretamente, através das propriedades de hidratação. |
| first_indexed | 2024-12-13T05:51:13Z |
| format | Article |
| id | doaj.art-f360807c433543df81b502c9d6f596c3 |
| institution | Directory Open Access Journal |
| issn | 1516-8913 1678-4324 |
| language | English |
| last_indexed | 2024-12-13T05:51:13Z |
| publishDate | 2005-01-01 |
| publisher | Instituto de Tecnologia do Paraná (Tecpar) |
| record_format | Article |
| series | Brazilian Archives of Biology and Technology |
| spelling | doaj.art-f360807c433543df81b502c9d6f596c32022-12-21T23:57:32ZengInstituto de Tecnologia do Paraná (Tecpar)Brazilian Archives of Biology and Technology1516-89131678-43242005-01-01481637210.1590/S1516-89132005000100010Effect of treatment with alkaline hydrogen peroxide associated with extrusion on color and hydration properties of oat hullsMelicia Cintia GaldeanoMaria Victória Eiras GrossmannAn incomplete factorial design with three independent variables at three levels of variation was used to evaluate the effect of the treatment with alkaline hydrogen peroxide concomitant with extrusion on some properties of oat hulls. The independent variables were hydrogen peroxide level, feed moisture and extrusion temperature. The dependent variables were water retention capacity (WRC), swollen volume (SV) and color. The analysis of variance showed that temperature was the most important variable for the hydration properties. The highest values of WRC and SV were obtained when oat hulls were processed in the condition of 7% hydrogen peroxide, 32% feed moisture and 90ºC extrusion temperature. Modified hulls had a WRC 70% higher and SV 55% higher than the untreated material. The instrumental measure of color was conducted to analyze the modifications promoted due to the treatment in this parameter. The highest value of brightness was obtained with 7% hydrogen peroxide. The modifications in the fibers were accompanied indirectly through hydration properties.<br>Um delineamento fatorial incompleto 3³ foi utilizado para estudar o efeito do tratamento com peróxido de hidrogênio alcalino associado à extrusão sobre algumas propriedades funcionais da fibra da casca de aveia. As variáveis do tratamento avaliadas incluíram teor de peróxido de hidrogênio (%), umidade da amostra (%) e temperatura de extrusão (ºC). A análise de variância (ANOVA) mostrou que a temperatura foi a variável mais importante para as propriedades de hidratação. Os maiores valores de capacidade de retenção de água (CRA) e volume de intumescimento foram obtidos na condição de 7% de peróxido de hidrogênio, 32% de umidade e 90ºC de temperatura, obtendo um incremento de 70% na CRA e 55% no volume de intumescimento. A medida instrumental de cor foi usada para analisar as modificações ocorridas neste parâmetro. O mais alto valor de luminosidade foi alcançado com maior nível de peróxido de hidrogênio (7%), obtendo-se, nessa condição, produtos mais claros. Ensaios realizados para controle mostraram que tanto a extrusão quanto o tratamento químico tiveram efeito nas propriedades avaliadas, e que o efeito conjunto foi superior ao de cada um isoladamente. As modificações ocorridas nas fibras foram acompanhadas indiretamente, através das propriedades de hidratação.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000100010Dietary fiberoat hullschemical modificationfunctional properties |
| spellingShingle | Melicia Cintia Galdeano Maria Victória Eiras Grossmann Effect of treatment with alkaline hydrogen peroxide associated with extrusion on color and hydration properties of oat hulls Brazilian Archives of Biology and Technology Dietary fiber oat hulls chemical modification functional properties |
| title | Effect of treatment with alkaline hydrogen peroxide associated with extrusion on color and hydration properties of oat hulls |
| title_full | Effect of treatment with alkaline hydrogen peroxide associated with extrusion on color and hydration properties of oat hulls |
| title_fullStr | Effect of treatment with alkaline hydrogen peroxide associated with extrusion on color and hydration properties of oat hulls |
| title_full_unstemmed | Effect of treatment with alkaline hydrogen peroxide associated with extrusion on color and hydration properties of oat hulls |
| title_short | Effect of treatment with alkaline hydrogen peroxide associated with extrusion on color and hydration properties of oat hulls |
| title_sort | effect of treatment with alkaline hydrogen peroxide associated with extrusion on color and hydration properties of oat hulls |
| topic | Dietary fiber oat hulls chemical modification functional properties |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000100010 |
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