Artigo

Comportamento reológico de suco misto elaborado com frutas tropicais

The rheological properties of a juice blend obtained from a tropical fruit mix were determined in this work using a rotational viscosimeter at temperatures from 10 ºC to 60 ºC. The Power law and Mizrahi-Berk models were fitted to the experimental data. All the models were considered adequate to desc...

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Autor principal: BEZERRA, Carolina Vieira
Outros Autores: SILVA, Luiza Helena Meller da, COSTA, Rebeca Desireé Sousa da, MATTIETTO, Rafaella de Andrade, RODRIGUES, Antonio Manoel da Cruz
Grau: Artigo
Idioma: por
Publicado em: 2014
Assuntos:
Acesso em linha: http://repositorio.ufpa.br/jspui/handle/2011/5413
Resumo:
The rheological properties of a juice blend obtained from a tropical fruit mix were determined in this work using a rotational viscosimeter at temperatures from 10 ºC to 60 ºC. The Power law and Mizrahi-Berk models were fitted to the experimental data. All the models were considered adequate to describe the rheological properties of the juice blend according to the fitted statistical parameters. The behaviour index of the product was below 1.0, indicating the pseudoplasticity of the juice. The behaviour indexes for consistency were found to decrease with increase in temperature. The effect of temperature on the rheological behaviour of the juice was described by an Arrhenius type equation and discussed in terms of the activation energy (Ea). The values for Ea varied from 4.27 to 4.66 kcal.gmol-1 with increases in shear rate.