The objective was to elaborate gluten-free bread, using different hydrocolloids and to verify the effect of substitution of rice flour for sweet potato flour (SPF) on the technological and sensory quality of bread. Better results were observed with the use of 2% carboxymethylcellulose (CMC), without significant difference (p > 0.05) in the sensory evaluation of the samples containing hydrocolloids. Lower specific volume and higher hardness was observed with the addition of CMC and higher levels of SPF. The microbiological evaluation of bread made from the substitution of 25% rice flour for SPF allowed to establish shelf life of 7 days, with an acceptability index of 80.3%, which is considered high because it is a new product. Regarding the purchase intention, only 2% of assessors would certainly not buy the product, showing that the addition of hydrocolloids and SPF to gluten-free bread formulations may be an effective alternative for the gluten-intolerant public.

Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que o trabalho original seja corretamente citado. Geleia de buriti (Mauritia flexuosa): agregação de valor aos frutos do cerrado brasileiro Buriti (Mauritia flexuosa) jelly: adding value to fruits from the Brazilian savanna ResumoO buriti é uma palmeira brasileira que se destaca pela sua beleza e pelos seus múltiplos usos na alimentação humana, apresentando elevado valor nutricional. Visando ao seu maior aproveitamento, foi realizada a elaboração de geleia de buriti. O produto foi caracterizado em seu aspecto físico-químico, por meio de análises de: composição proximal, fibras, valor energético, sólidos solúveis totais, pH, acidez total titulável, potencial antioxidante e vitaminas lipossolúveis. A geleia apresentou potencial antioxidante, além de consideráveis teores de vitaminas A e D, podendo também ser considerada fonte de fibras. Logo, o processamento de buriti, na forma de geleia, é mais uma alternativa para o seu aproveitamento e para a agregação de valor ao fruto do cerrado, além de este possuir valor nutricional. Palavras-chave: Potencial antioxidante; Vitamina A; Processamento. AbstractBuriti is a Brazilian palm that stands out for its beauty and its multiple uses as a food for humans, with high nutritional value. Aiming to maximize its exploitation, buriti jelly was produced. A physicochemical characterization of the product was carried out by determining the proximate composition, fibre, energy, total soluble solids, pH, titratable acidity, soluble vitamins and the antioxidant potential. The jelly showed potential antioxidant activity, as well as considerable amounts of vitamins A and D, and can also be considered a source of fibre. Thus, the processing of buriti in the form of jelly is one more alternative for the exploitation and value aggregation of a Brazilian savanna fruit, as well as having nutritional value.

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This study was carried out to evaluate the behavior of high moisture Mozzarella cheese during 60 days of storage at 7 ºC in BOD incubator for microbiological quality, physicochemical composition, functional properties, and texture profile. The cheeses were purchased in a dairy industry from the city of Rio Verde, GO. The study was performed for 60 days at 20 days intervals between analysis. In order to evaluate if the changes occurred during storage time were significant, the analysis of variance was performed, and the means of the different storage days were compared by the Tukey test at 95% confidence. The results indicated hygienic-sanitary quality in the production of cheeses. The physicochemical composition was influenced by time only in the pH values and protein content; however, they were in accordancewith studies already performed. The functional properties of the cheeses were influenced by the storage time, only the free oil content remained stable. The color analysis of the cheeses showed values tending to yellow coloration throughout the storage period. As the primary and secondary proteolysis increased, there was also an increase in the melting capacity and changes in the texture parameters. Mozzarella cheese was suitable for consumption with a storage period of 60 days at 7 ºC, and the changes that have occurred are acceptable and required because this cheese is commonly used in pizzas.

The aim of this work was to obtain Brazil-soluble Brazil nut extract on a pilot scale, to determine the physical-chemical, microbiological, sensory and rheological characteristics of the products obtained and to determine the microbiological, physical-chemical and physical stability of the extract in presence and absence light and preservatives. This is a quantitative study, carried out in the laboratory. Extracts were characterized in terms of physicochemical (proximate composition, mineral profile, pH, titratable acidity, color), rheological (apparent viscosity, flow index, consistency coefficient), microbiological (yeast and molds, Salmonella sp., coliforms at 35ºC and at 45ºC and coagulase positive Staphylococcus), and sensory (odor, color, taste, global impression, buying intention) parameters. Furthermore, the effect of the addition of preservatives (500 mg/L citric acid, 0.15% w:v sodium benzoate and 0.1% w:v potassium sorbate) and of the exposure to light on the physicochemical (pH, titratable acidity), physical (color variation) and microbiological stabilities throughout storage were assessed. The extracts had high energy content, due to its high protein and fat contents, besides being a valuable source of selenium. The extracts were characterized as non-Newtonian pseudoplastic fluids, and were well accepted in sensory analysis, with up to 60% of the consumers indicating willingness to buy the product. The presence of preservatives at least doubled the shelf-life of the products, from 9 to up to 21 days. The incidence of light had no effect in the stability of the extracts.