Estudio de aceptabilidad y saciedad de barritas de cereal altas en fibra dietética en escolares de una escuela rural de Chile / Acceptability and saciety study of cereal bars high in dietetic fiber in schoolage children of a Chilean rural school

Cereal bars for infant collation in two flavors were developed: apple and red fruits. The bars were made with oatmeal and dried fruit, low in saturated fat, total sugars and sodium. The effect of the addition of 2.5% of β-glucan in the bars on the sensory acceptability, satiety and digestive tolerance in primary school children were evaluated. The results showed high sensory acceptability to all bars (both flavors, with and without β-glucan), being higher in children from 1st to 4th grade and in men (p <0.05). Consumption of the bars produced satiety in children without stumbling significant differences due to thepresence of β-glucan. Regarding the digestive tolerance, no cases of discomfort were presented, indicating that all cereal bars were well tolerated. The addition of β-glucan in the bars does not affect the sensory acceptability of these and does not affect satiety compared to bars without β-glucan.

RESUMEN Se desarrollaron barritas de cereal destinadas a la colación infantil en dos sabores: manzana y frutos rojos. Las barritas se elaboraron con avena y frutos deshidratados, con bajo contenido de grasas saturadas, azúcares totales y sodio. Se evaluó el efecto de la incorporación de 2.5% de β-glucano en las barritas sobre la aceptabilidad sensorial, saciedad y tolerancia digestiva en escolares de educación básica. Los resultados obtenidos demostraron alta aceptabilidad sensorial para todas las barritas (ambos sabores, con y sin β-glucano), siendo mayor en niños de 1° a 4° básico y en hombres (p<0.05). El consumo de las barritas produjo saciedad en los niños, sin encontrase diferencias significativas por efecto de la presencia de β-glucano. Respecto a la tolerancia digestiva, no se presentaron casos de malestar, lo que indica que todas las barritas de cereal fueron bien toleradas. La incorporación de β-glucano en las barritas no afecta la aceptabilidad sensorial de éstas y tampoco afecta la saciedad respecto a barritas sin β-glucano.

Estabilidade de micro-organismos potencialmente probióticos em barra de cereais - efeito da técnica de incorporação / Stability of microorganisms potentially probiotics in cereal bar - Effect of technique of incorporation

Este trabalho objetivou desenvolver formulações de barras de cereais contendo Lactobacillus acidophilus e Saccharomyces boulardii e avaliar a estabilidade destes micro-organismos potencialmente probióticos no produto elaborado durante o tempo de armazenamento (shelf life). Foram formuladas barras de cereais contendo separadamente os agentes probióticos S. boulardii e L. acidophilus, ambos nas formas liofilizada, granulados com lactose e encapsulados em alginato de cálcio. Foi avaliada a estabilidade dos micro-organismos durante o tempo de armazenamento. Tanto a levedura S. boulardii quanto a bactéria L. acidophilus apresentaram maior sobrevida na forma liofilizada, quando comparado com as outras formas de incorporação, mantendo contagem na faixa de 7 log UFC/g, durante oito semanas e na faixa de 7 log UFC/g, durante seis semanas, respectivamente. Comparando os resultados da incorporação dos dois micro-organismos na forma livre liofilizada observouse que a população de S. boulardii apresentou melhores resultados de viabilidade quando comparada com a população de L. acidophilus. Este estudo mostrou que é possível incorporar micro-organismos potencialmente probióticos em barras de cereais, preferencialmente na forma liofilizada, por proporcionar maior sobrevida dos micro-organismos.(AU)

This study aims to develop formulations of cereal bars that contain Lactobacillus acidophilus and Saccharomyces boulardii and evaluate the stability of these potentially probiotic microorganisms in the elaborated product during the time of storage (shelf life). Cereal bars were designed containing separately the probiotic agents S. boulardii and L. acidophilus, both in the lyophilized form, granulated with lactose form and encapsulated in calcium alginate form. The stability of microorganisms during storage time was evaluated. Both, the yeast S. boulardii as well as the bacterium L. acidophilus showed a higher survival in the lyophilized form when compared with the other forms of incorporation, keeping the count in the range of 7 log UFC/g for eight weeks and in the range 7 log UFC/g for six weeks, respectively. Comparing the results of the incorporation of the two microorganisms in the free lyophilized form, one could observe that the population of S. boulardii showed better results of viability when compared with the population of L. acidophilus. This study showed that it is possible to incorporate potentially probiotic microorganisms in cereal bars, preferably in the lyophilized form, in order to provide a higher survival of the microorganisms.(AU)