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Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/5141

Title: Rheological behavior of functional sugar-free guava preserves: Effect of the addition of salts
???metadata.dc.creator???: Pereira, Patrícia Aparecida Pimenta
Souza, Vanessa Rios de
Teixeira, Taísa Rezende
Queiroz, Fabiana
Borges, Soraia Vilela
Carneiro, João de Deus Souza
Keywords: Texture profile
Pearson correlation
Principal components analysis
Uniaxial compression
Stress relaxation
Publisher: Elsevier
Issue Date: 15-Nov-2012
Citation: PEREIRA, P. A. P. et al. Rheological behavior of functional sugar-free guava preserves: effect of the addition of salts. Food Hydrocolloids, Oxford, v. 31, n. 2, p. 402-412, Jun. 2013.
Abstract: The addition of salts to carrageenan and locust bean gum gels functions to improve the characteristics of texture, thereby increasing gel strength. This effect is widely studied in gels of model systems but is studied to a lesser extent in complex systems, such as fruit preserves. The objective of this study was to evaluate the effect of adding salts on the rheological behavior of functional sugar-free guava preserves, as well as to correlate the rheological parameters. To this end, three types of texture properties were analyzed (texture profile, stress relaxation and uniaxial compression) in functional sugar-free guava preserves prepared with different concentrations of KCl and CaCl 2 salt. The analyses were performed with a texturometer (Stable Micro Systems, Model TA - XT2i), and the parameters were analyzed using a Scott-Knott test at 5% probability, principal components analysis and Pearson correlation. CaCl 2 was more effective for improving the characteristics of texture, especially gel strength (concentration near the F3: 0.33%), whereas KCl addition degraded gel strength. In the analysis of test relaxation, the Maxwell model parameters provided better discrimination between samples than the Peleg model parameters. Positive and negative correlations were observed, and the parameters of hardness, adhesiveness and elastic modulus ideal (E 1 ) were the most correlated with other rheological parameters.
URI: http://www.sciencedirect.com/science/article/pii/S0268005X12002792
???metadata.dc.language???: en
Appears in Collections:DCA - Artigos publicados em periódicos

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