Improving Microwave Heating using Polysaccharides as Thickeners

L. M. Guardeño, M. Hernández-Carrión, J. M. Catala-Civera, P. Plaza, L. Pérez-Munuera and I. Hernando
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L. M. Guardeño: Grupo de Microestructura y Química de Alimentos, Departamento de Tecnología de Alimentos and
M. Hernández-Carrión: Grupo de Microestructura y Química de Alimentos, Departamento de Tecnología de Alimentos and
J. M. Catala-Civera: Research Institute ITACA, Universidad Politécnica de Valencia, 46022 Valencia, Spain *E-mail: mihernan@tal.upv.es
P. Plaza: Research Institute ITACA, Universidad Politécnica de Valencia, 46022 Valencia, Spain *E-mail: mihernan@tal.upv.es
L. Pérez-Munuera: Grupo de Microestructura y Química de Alimentos, Departamento de Tecnología de Alimentos and
I. Hernando: Grupo de Microestructura y Química de Alimentos, Departamento de Tecnología de Alimentos and

Czech Journal of Food Sciences, 2009, vol. 27, issue SpecialIssue1, S342-S345

Abstract: The aim of this work was to improve microwave heating in white sauces using different polysaccharides in their formulation; ι-, λ- and κ-carrageenan and native and modified starches were used as thickeners. Five model systems were prepared, each one with a different polysaccharide, salt, and water. Dielectric loss factor (ε'') was measured and penetration depth of the electric field was calculated at 20 and 40°C at 2450 GHz. The results showed that ε'' increased significantly (P < 0.05) when temperature rose in all the model systems. Moreover, ε'' decreased significantly (P < 0.05) when the polysaccharide concentration rose in the systems elaborated with starch (both native and modified). The penetration depth increased significantly at 40°C when native starch concentration rose. Not significant differences due to the thickener concentration were found in the depth penetration values in the other model systems, both at 20 and 40°C.

Keywords: polysaccharides; salt; starch; carrageenan; sauces; microwaves; microstructure; dielectric properties (search for similar items in EconPapers)
Date: 2009
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjf:v:27:y:2009:i:specialissue1:id:1085-cjfs

DOI: 10.17221/1085-CJFS

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