Avaliação de bebida láctea fermentada saborizada com polpa de araticum

• Autor(a) principal: Costa, Alexsandra Valéria Sousa
• Data de Publicação: 2013
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tede/4385
• topic: Cerrado; Frutos; Leite; Nutracêuticos; Soro de queijo; Fruit; Milk; Nutraceuticals; Savannah; Whey; CIENCIA E TECNOLOGIA DE ALIMENTOS::CIENCIA DE ALIMENTOS

The objective of this study was to produce a fermented dairy drink flavored with araticum and assess its functional, nutritional and sensory properties. In this project were prepared and formulated the araticum fermented dairy drink, with the preferred whey and pulp concentrations, determined in preliminary tests. The fermented dairy drink was stored under refrigeration (4 ± 1°C), following the shelf life of the products for eight weeks, and it was treated in nine storage times (0, 1st, 2nd, 3rd, 4th, 5th, 6th, 7th and 8th week) with three replications of processing (three lots) by type of formulation, and in triplicate. Were evaluated the following physico-chemical properties of the fermented dairy drink formulations: pH, acidity in lactic acid, lactose, color (L*, a*, b*, C* and h*), aw, soluble solids, viscosity, moisture, ash, lipids, proteins, total solids, total carbohydrates and calories. We performed microbiological analyzes of yeasts and molds, viable lactic bacteria, the most probable number of coliforms at 35ºC and 45ºC and Salmonella sp in fermented dairy drink . Were assessed the formulations of the fermented dairy drink (manufactured and stocked weekly) at baseline (time zero) and weekly (during seven weeks) using the difference control test in 14 trained panelists. We evaluated the impact of information (with and without bioactive compounds) with the aid of a nine-point hedonic scale. The physico-chemical and microbiological characteristics of the final product were evaluated at baseline and weekly for eight weeks of storage. Were assessed, in araticum pulp samples, the physico-chemical composition and the nutritional properties (moisture, ash, fat, protein, pH, titratable acidity, citric acidity, total solids, total carbohydrates, calories, glucose, sucrose and total sugar), the functional properties (ascorbic acid/vitamin C, tannins, phenolic compounds, beta-carotene, vitamin A, carotenoid lutein, total dietary fiber, dietary fiber, soluble and insoluble), and microbiological quality (coliforms at 35ºC and 45ºC, Salmonella sp., yeasts and molds). Were analyzed milk and whey samples regarding the physico-chemical composition. The experimental design was completely randomized. The results of physico-chemical properties and sensory characteristics were evaluated by comparing the treatment means, using the Tukey test in transformed mean, establishing a statistical significance level of 5% probability. The results of the microbiological analyzes were descriptive. Were performed analysis of variance using the program R. The following results were achieved: there was good acceptability of fermented milk drink by both children and adults (between 70 and 80%) in the preliminary tests; fermented dairy drink with the lowest concentration of pulp and serum was accepted and selected for the formulation of the final product; there was good acceptability (above 80%) of fermented milk drink flavored with araticum pulp as the final product; knowledge of the excellent nutritional and functional value of fermented dairy drink made with araticum pulp; the fermented dairy drink flavored with araticum pulp and without the addition preservatives obtained shelf-life of six weeks.