Edible coatings incorporated with bioactive extracts have shown the potential to delay fruit ripening. The aim of this work was to evaluate the effect of edible coatings incorporated with tamarind seed extract (Tamarindus indica L.) on the physicochemical and microbiological characteristics of guavas during storage at room temperature for 10 days. Six coatings formulations were prepared and applied to guavas. The coated guavas demonstrated similar pH and firmness values and lower values of mass loss than those obtained with uncoated guavas on the tenth day of storage. Regarding color, similar values of L* and lower values of a* and b* were observed in relation to the control. In relation to microbial contamination, both coated and uncoated guavas showed aerobic mesophilic bacteria and mold and yeast counts between 102 and 103 CFU/mL on the tenth day of storage. The cassava starch and chitosan coatings incorporated with tamarind seed extract showed potential to be applied in the preservation of guavas stored at room temperature.
A batata doce (Ipomoea batatas), é um dos alimentos mais nutritivos, pois possui carboidrato complexo de baixo índice glicêmico, rica em fibras, ferro, vitamina C e potássio, além de apresentar alto teor de vitamina E. Esta planta originária da América Tropical, é uma das tuberosas mais populares do Brasil. O aproveitamento agroindustrial desse tubérculo constitui uma alternativa de reduzir as perdas pós-colheita, além de agregar valor à matéria-prima. Diante do exposto, o objetivo deste trabalho foi de obter um produto em forma de farinha de duas variedades de batata-doce, ou seja, a roxa e a branca, realizando a caracterização nutricional, além de enriquece-la com 1% de ácido ascórbico. Todas as análises foram realizadas em triplicatas de acordo com as normas do Instituto Adolfo Lutz, (2005) e AOAC (1980). Conclui-se que as farinhas das duas variedades de batata doce, apresentaram significativo teor nutricional, e que a formulada com 1% de ácido ascórbico, mesmo após a secagem apresentou um alto teor ácido ascórbico.
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