2013
DOI: 10.1590/s1981-67232013005000004
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Avaliação do comportamento reológico de diferentes iogurtes comerciais

Abstract: A consistência e a viscosidade do iogurte são uns dos principais fatores envolvidos na qualidade e aceitação do produto. Dessa forma, este trabalho apresenta um estudo de comparação reológica entre iogurtes comerciais do Rio de Janeiro, Brasil, em cujas formulações constam diferentes espessantes. Foram utilizadas três grandes marcas do mercado e, entre os espessantes utilizados, estão: goma guar, goma xantana, goma carragena, goma alfarroba e carboximetilcelulose. Previamente às análises reológicas, as amostra… Show more

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Cited by 25 publications
(28 citation statements)
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“…Analyzing the viscosities of the beverages (Figure 2), it was observed a decrease when the temperature increased, that can be explained by the use of the stabilizer carboxymethylcellulose, which according to Selomulyo & Zhou (2007), solutions with carboxymethylcellulose tend to be highly viscous and stable, but the viscosity decreases during heating. Mathias et al (2013) verified the rheological behavior of different commercial yoghurts, which, independently of the thickeners used, all yogurt samples analyzed showed a non-Newtonian and pseudoplastic fluid behavior, since there was a decrease in viscosity as a function of the increase in the applied shear rate.…”
Section: Resultssupporting
confidence: 70%
“…Analyzing the viscosities of the beverages (Figure 2), it was observed a decrease when the temperature increased, that can be explained by the use of the stabilizer carboxymethylcellulose, which according to Selomulyo & Zhou (2007), solutions with carboxymethylcellulose tend to be highly viscous and stable, but the viscosity decreases during heating. Mathias et al (2013) verified the rheological behavior of different commercial yoghurts, which, independently of the thickeners used, all yogurt samples analyzed showed a non-Newtonian and pseudoplastic fluid behavior, since there was a decrease in viscosity as a function of the increase in the applied shear rate.…”
Section: Resultssupporting
confidence: 70%
“…Consistency and viscosity are factors that influence mainly final product quality, consequently exerting a great influence on its acceptance (MATHIAS et al, 2013). Figure 6 shows the results of lactic bacteria over the 29 days of storage.…”
Section: Resultsmentioning
confidence: 99%
“…Isso acontece em função do enfraquecimento das interações existentes entre as moléculas do produto e da diminuição da energia de interação entre elas com o aumento da taxa de cisalhamento [30,31] . O comportamento de fluido não newtoniano já havia sido descrito para bebida láctea e leite fermentado adicionado de probióticos por Cunha et al [32] ; enquanto, o comportamento pseudoplástico já havia sido relatado para iogurtes naturais e leites fermentados concentrados e dessorados [33,34] , e, ambos comportamentos já haviam sido relatados para iogurtes de marcas comerciais [35] .…”
Section: Resultsunclassified