Periódicos
URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/3352
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Item Evaluation of probiotic microencapsulation in a prebiotic mixture with coffee extract(Editora UFLA, 2019-07) Zapata, Angela María Ormaza; Arango, Félix Octavio Díaz; Rodríguez-Barona, SneyderThe objective in the present study was to evaluate coffee extract as an encapsulant material, when mixed with prebiotic carbohydrates, in order to obtain a coffee-based, non-dairy probiotic beverage. Six coffee extract formulations were evaluated with maltodextrin and inulin, in various proportions, for the obtaining of microcapsules with the probiotic strain L. casei ATCC 393, by way of spray drying. The best formulations encountered were MD-INU:EXT (50:50) and EXT:Water (50:50), which were spray dried, for increased viability, elevated wettability and solubility, low hygroscopicity, and adequate morphology for this type of powdered product. The formulation was composed of maltodextrin, inulin, and coffee extract, and MD-INU:EXT (50:50) presented the best physicochemical and viability characteristics. The potential of coffee extract was proven as a wall material in microencapsulated, non-dairy, highly acidic, probiotic products. Optimal viability was achieved, in the order of 1x106 CFU/mL, for both selected formulations, which maintained functional potential for up to 11 weeks of storage.Item The effect of gravity-drip filtration methods on the chemical and sensorial properties of coffee (Coffea arabica L. var. Castillo)(Editora UFLA, 2019-07) Zapata, Angela María Ormaza; Arango, Félix Octavio Díaz; Rojano, Benjamín AlbertoCoffee prepared via gravity-drip filtration is an alternative to obtain varied sensorial profiles and determine the acidity, bitterness, and body thereof. In the present study, the retention of certain bioactive components was determined, as was the antioxidant activity and cup profiles for coffee beverages prepared by way of seven different gravity-drip filtration methods. The methods which registered the greatest bioactive metabolite retention were the Vietnamese, Clever, and RS 16 methods. The greatest hydroxycinnamic acid content was obtained with the Clever, Yama, Vietnamese, and V60 methods, in descending order. Antioxidant capacity was proportional to the retention of bioactive components, by way of ABTS and ORAC techniques, in the beverages prepared. The V60 and V60 Kalita methods retained the lowest amounts these compounds and their activity. The most predominant hydroxycinnamic acid in the seven evaluated preparations was chlorogenic acid. In accordance with consumer preferences, which seek functional food, it is recommended that coffee be consumed using the Clever or Vietnamese preparation methods, which present fuller body and enhanced bitter notes. In their absence, the RS 16 method is suggested, which presents a sensorial profile identical to that of the U.G.Q. pattern, with less intensity of bitterness.