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Información tecnológica

On-line version ISSN 0718-0764

Abstract

ANDRADE, Ricardo D; ARTEAGA, Margarita R  and  SIMANCA, Mónica M. Effect of the bran wheat on the rheological behavior of yogurt buffalo milk. Inf. tecnol. [online]. 2010, vol.21, n.5, pp.117-124. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642010000500015.

In the present study the effect of wheat bran addition (0, 1, 3, 5% w/v) and the storage time in the rheological behavior of the yogurt buffalo milk were evaluated. Fat matter, antibiotic presence, total solids, acidity and pH were determined in buffalo milk. Rheological measurements were carried out using a Brookfied viscometer DV-ll+Pro model, fitting the data to the model of Oswald de Wale. The yogurt presented a pseudoplastic and thixotropic behavior. Wheat bran addition influenced proportional directly way the rheological parameters, making more consistent and less pseudoplastic. Storage time was inversely proportional to the consistency índex and directly proportional to the flow índex, being less consistent, with tendency to Newtonian fluid.

Keywords : yogurt; buffalo milk; rheology; Ostwald de Waele; pseudoplastic; thixotropic.

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