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Mathematical modeling of the viscosity of tomato, broccoli and carrot purees under dynamic conditions
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Institutet för livsmedel och bioteknik.ORCID iD: 0000-0001-8266-0528
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Institutet för livsmedel och bioteknik.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Institutet för livsmedel och bioteknik.
2014 (English)In: Journal of Food Engineering, ISSN 0260-8774, E-ISSN 1873-5770, Vol. 124, p. 35-42Article in journal (Refereed) Published
Abstract [en]

Different viscosity models were developed to describe the viscosity of unprocessed fruit and vegetable purees under dynamic conditions. Temperature hysteresis cycles were carried out for three purees with different structural characteristics (tomato, carrot, and broccoli), with heating and cooling phases from 10 to 80°C with isothermal (holding) phases at 10, 30, 60 or 80°C. The apparent viscosity was measured continuously with a rotational rheometer and the data was analyzed with time-independent and time-dependent models (quantifying rheopexy, thixotropy, or both). The results revealed clear thixotropic behavior in tomato puree, attributed to shearing effects, and rheopectic in broccoli puree, attributed to gel formation at the higher temperatures. Although carrot puree data from the isothermal periods could be quantified satisfactorily with no time dependency, analysis of the nonisothermal periods proved that rheopectic effects also needed to be included. © 2013 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
2014. Vol. 124, p. 35-42
Keywords [en]
Food Engineering
Keywords [sv]
Livsmedelsteknik
National Category
Food Science
Identifiers
URN: urn:nbn:se:ri:diva-8875DOI: 10.1016/j.jfoodeng.2013.09.031OAI: oai:DiVA.org:ri-8875DiVA, id: diva2:966748
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2018-07-18Bibliographically approved

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Tibäck, Evelina

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