Navegando por Autor "Alves, Juliana Josh Silva"

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Jambolão extract and potassium sorbate as antimicrobial components in active packaging.
(2022) Dias, Ana Clara Costa; Alves, Juliana Josh Silva; Santos, Izabela Silva dos; Cunha, Luciana Rodrigues da; Pereira, Patrícia Aparecida Pimenta
This study aimed to use the raw extract of jambolão (Syzygium cumini L.) and potassium sorbate as antimicrobial components in cellulose acetate films and evaluate their potential for application as active packaging for sugar-free banana preserve. The films were prepared using the casting method and evaluated for thickness and inhibition potential. The efficiency of the films as active packaging, in situ, was evaluated through the enumeration of aerobic mesophiles and mold and yeast over 36 days of storage of banana preserves. Furthermore, in order to analyze the fungicidal effect of the films against banana preserve with an initial load of microorganisms, mold and yeast were counted for 25 days of storage. The results showed that the incorporation of crude jambolão extract increased the film thickness, and its inhibition potential was similar to the film with incorporated potassium sorbate. Furthermore, the film with crude jambolão extract reduced mold and yeast growth by up to 1 log cycle over 36 days of storage. Furthermore, the use of the film with potassium sorbate promoted the same effect as this preservative added directly to the fruit preserve and proved to be efficient even with relevant initial contamination. Thus, the use of these active packagings presents an opportunity for industries as they reduce health risks and improve the safety and quality of preserves.
The effect of different types of sugars on the physicochemical characteristics, sensory acceptance, and bioactive compounds of jaboticaba jellies.
(2021) Pinto, Vitória Regina; Dias, Ana Clara Costa; Assis, Flávio Santos de; Costa, Laís Cristina Barbosa; Santos, Paloma Cristina dos; Alves, Juliana Josh Silva; Barboza, Izabela Vivarelli; Gomes, Camila Carolinne Martins; Santos, Izabela Silva dos; Monteiro, Reginaldo de Souza; Cunha, Luciana Rodrigues da; Gandra, Kelly Moreira Bezerra; Pereira, Patrícia Aparecida Pimenta
The study evaluated the effect of the different types of sugars (white refined sugar, white crystal sugar, demerara sugar, brown sugar) on the physicochemical characteristics, sensory acceptance, bioactive compounds, and antioxidant capacity of jaboticaba jellies. Four formulations of jellies were prepared, in triplicate. The research data were analyzed using Tukey averages test and exploratory analysis by PCA and PARAFAC techniques. It was verified that the type of sugar influences the physicochemical characteristics, sensory acceptance, bioactive compounds, and the antioxidant capacity of jaboticaba jellies; owing to its undesirable sensory characteristics, it is not possible to use brown sugar, even when it produces jellies with higher content of total phenolic compounds and antioxidant capacity. White refined sugar, white crystal sugar, and demerara sugar are the most suitable sugars for processing jaboticaba jellies owing to their high sensory acceptance and physicochemical characteristics, such as lower pH and vivid color.