emulsion of systems containing egg yolk, polysaccharides and vegetable oil emulsão de sistemas contendo gema de ovo, polissacarídeos e óleo vegetal

emulsion of systems containing egg yolk, polysaccharides and vegetable oil emulsão de sistemas contendo gema de ovo, polissacarídeos e óleo vegetal

;Clitor Junior Fernandes de Souza;Edwin Elard Garcia Rojas
information and software technology 2012 Vol. 36 pp. 543-550
198
souza2012cinciaemulsion

Abstract

This work characterizes the emulsifying properties of systems containing egg yolk (0.1; 1.0 and 2.5 % w/v) and polysaccharides (xanthan gum, carrageen, pectin and carboxymethylcellulose) and three different vegetable oils (sunflower, canola, and palm oils). Emulsifying activity and emulsion stability were measured of each combination and it was found the effect of the oil on emulsion stability correlated to the amount of monounsaturated fatty acid. Additionally, increased egg yolk concentration increased emulsifying activity by reducing coalescence of oil droplets. Lastly, 2.5% egg yolk and 0.2% polysaccharide generated emulsions with high emulsifying activity, excellent stability, and droplet size of 4.32 µm.
Neste trabalho, caracterizam-se as propriedades emulsificantes de sistemas contendo gema de ovo (0,1; 1,0 e 2,5% m/v), polissacarídeos (goma xantana, carragena, pectina e carboximetilcelulose) e três diferentes óleos vegetais (óleos de palma, canola e girassol). Atividade emulsificante e estabilidade da emulsão foram medidas para cada combinação e verificou-se o efeito do óleo sobre a estabilidade da emulsão correlacionada com a quantidade de ácido graxo monoinsaturado. Além disso, a concentração de gema de ovo aumentou a atividade emulsificante, reduzindo a coalescência das gotículas de óleo. Por último, 2,5 % de gema de ovo e 0,2% de polissacarídeo formaram emulsões com alta atividade emulsificante, excelente estabilidade e tamanho de gota de 4,32 µm.

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