Yerba mate (Ilex paraguariensis Saint Hilaire) processing generates large amounts of powder that are not added to the final product. This powder has a similar composition to commercial yerba mate and it can be used to extract bioactive compounds. The work aims to prepare carrot pickles added with yerba mate powder extract to improve the Total Phenol Content (TPC) of the final product. The TPC and the color of the pickles were studied in the carrots and the liquid brine for a total of 120 days, by testing two storage temperatures (25 and 45 °C). The TPC was determined by the Folin-Ciocalteu method, and color parameters L*, a*, and b* were measured using a colorimeter. In addition, a sensory acceptability analysis was performed at the end of storage. Pickled carrots without extract addition showed significant losses of polyphenols during storage. The addition of increasing amounts of yerba mate powder extract significantly improved this parameter, thus achieving TPCs even higher than those of fresh carrots. The pasteurization, the addition of extract, and storage caused variations in the color of both fractions of the pickle, especially in the formulations with a higher proportion of yerba mate. However, the color changes were more important in the liquid brine, while in the carrots the variations were minimal. Sensory acceptability tests showed that the addition of extract did not influence the flavor of the pickles but caused changes in color acceptability. However, the product was accepted by consumers. The results showed that yerba mate powder extract can be added in small amounts into other foods for improving their TPC while causing minor modifications in color and sensory acceptability.
Se realizó un ensayo de aceptabilidad sensorial para determinar la concentración óptima de jugo para preparar mate frío o tereré y un análisis descriptivo para estudiar la variación de la intensidad de cuatro descriptores seleccionados durante el consumo del tereré. Los resultados del análisis descriptivo fueron correlacionados con los valores de sólidos solubles obtenidos mediante la simulación del consumo del mate frío. Para la determinación de la concentración óptima de jugo se realizó un ensayo de aceptabilidad con consumidores, y los datos fueron analizados con herramientas de estadística de supervivencia. La concentración óptima de jugo fue de 6,38 ± 0,62 g/L, que corresponde a un 22,87% de consumidores que rechazan la muestra. El ensayo descriptivo indicó que en los primeros tererés predomina el sabor del jugo y que posteriormente el sabor a yerba mate se intensifica gradualmente. Los coeficientes de correlación lineal entre los puntajes asignados a los descriptores sensoriales y las concentraciones de sólidos solubles de la simulación del consumo del mate sugieren que deben realizarse otros análisis representativos de la muestra a fin de establecer correlaciones más significativas.
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