Rheological methods to analyse the thermal aggregation of calcium enriched milks
| Autor: | Barbara Erica del Valle Meza, María Laura Olivares, Susana Zorrilla |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Otras Ingenierías y Tecnologías
0402 animal and dairy science chemistry.chemical_element Thermodynamics 04 agricultural and veterinary sciences INGENIERÍAS Y TECNOLOGÍAS Calcium Microstructure 040401 food science 040201 dairy & animal science Applied Microbiology and Biotechnology Fractal dimension CALCIUM Solvent Alimentos y Bebidas Viscosity Colloid 0404 agricultural biotechnology chemistry Rheology RHEOLOGY FORTIFIED MILK Orders of magnitude (data) TEMPERATURE Food Science |
| Popis: | The colloidal state of calcium enriched milks during heating and its microstructures were analysed through interpretation of rheometric data with the Brownian aggregation theory, which can be considered as complementary to the methods currently used. Viscosity was measured at 100 s−1 through temperature and time sweeps. It was observed that from 25 to 60C, viscosity slowly decreased as temperature increased; above 60C, viscosity sharply increased at different temperatures depending on the amount of CaCl2. From time sweeps, the aggregation of casein micelles was described through the Smoluchowski theory. The addition of CaCl2 at concentrations of 20 to 30 mmol kg−1 decreased the stability factor 5 to 6 orders of magnitude compared with non-enriched milk. Values of the fractal dimension indicated that aggregation yields disordered aggregates occluding high amounts of solvent. The methodology described may help to analyse colloidal stability and structures when different calcium salts are used for enrichment. Fil: Meza, Barbara Erica del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina Fil: Zorrilla, Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina Fil: Olivares, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina |
| Databáze: | OpenAIRE |
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