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Item Desenvolvimento de extrato hidrossolúvel à base de castanha-do-brasil (bertholletia excelsa) e macadâmia (Macadamia integrifolia)(Universidade Federal de Goiás, 2017-02-23) Machado, André Luiz Borges; Silva, Flávio Alves da; http://lattes.cnpq.br/1713250447051507; Cardoso, Cláudio Fernandes; http://lattes.cnpq.br/5163369332806586; Cardoso, Cláudio Fernandes; Silva, Flávio Alves da; Freitas, Fernanda Ferreira; Lima, Mayra Conceição Peixoto MartinsBrazil nut (Bertholletia excelsa) and Macadamia (Macadamia integrifolia) are rich feeds with excellent nutrients with higher quality. The main form of consumption of these nuts and almonds are in natura, but there are products which can be elaborated using these raw materials with high nutritional value and pleasant flavor. Water-soluble extracts are an alternative to consume them, which consist of fluid food of plant origin, that can be produced by nuts, oleaginous and even some grasses and they have great commercial appeal since they are free of animal’s fats, “lac free” (free of lactose) and have high rate of minerals. Thus, this research aimed to determine the best formulation, to accompany physical and microbiological stability, proximal composition, to estimate the shelf life and to determine the rheological behavior of a water-soluble extract made of Brazil nut and Macadamia. For the construction of mathematical models, with the purpose of knowing the effect of the variation of water, Brazil nut and Macadamia concentrations, basic components in the elaboration of the product on the proximal composition and physical aspects such as pH, titratable acidity and colorimetry, a simplex centroid design for mixtures was used and provided quadratic and cubic models showing excellent adjustment of experimental data. The Global Acceptance and Purchase Intention tests were performed for each experiment proposed by simplex centroid design and the Tukey test was used in order to determine the best proportion among the components of the ternary mixture. The formulation of water-soluble extract composed of 70% (w/w) water, 15% (w / w) Brazilian nut and 15% (w/w) Macadamia was considered to be the most preferred by tasters submitted to the sensory evaluations. In order to improve the product’s flavor, 10% (w/v) of sugar, expressed as sucrose, was added and the concentration of preservatives citric acid, potassium sorbate and sodium benzoate was reduced. The product was processed technologically under hygienic conditions and filled in 220 ml transparent glass bottles, hermetically sealed with metal crown cork, pasteurized at 80 °C/25 min, stored under refrigeration at 4 ° C and had its stability evaluated during 28 days. Growth of Thermotolerant Coliforms, Positive Coagulase Staphylococci, Salmonella sp, Molds and Yeasts during the evaluation period was not detected. There was a significant variation (p < 0.05) in pH in the first two weeks of storage, and remained without significant variation (p > 0.05) for the other weeks analyzed. The acidity remained constant throughout the lifetime. The product showed a yellowish-white color throughout the study, determined by the coordinates of the colorimetry. Sensory analysis scores for odor, color, taste and global impression averaged around 6, thus, concluding that the product has a 28 days of shelf life. The rheological profile of the beverage was evaluated at three different temperatures, at 25 °C (room temperature), at 45 °C (temperature of the disintegration stage of Brazil nut and Macadamia with water in blender), and at 80 °C, (pasteurization temperature). The Ostwald-de-Waele model was considered the best to describe the beverage flow and since the calculated flow rate of the model, was less than 1 at the temperatures studied, it had concluded that the beverage behaved as a fluid Non-Newtonian pseudoplastic. The apparent viscosity curves of the mixed drink were plotted and showed that the apparent viscosity decreased significantly (p < 0.05) with the increasing of temperature.Item Processamento e avaliação da estabilidade de extrato hidrossolúvel a base de castanha-do-Brasil (Bertholletia excelsa) e baru (Dipteryx alata Vogel)(Universidade Federal de Goiás, 2017-02-23) Silva, Kamilla Soares; Silva, Flávio Alves da; http://lattes.cnpq.br/1713250447051507; Cardoso, Cláudio Fernandes; http://lattes.cnpq.br/5163369332806586; Cardoso, Cláudio Fernandes; Silva, Flávio Alves da; Freitas, Fernanda Ferreira; Viana, Letícia Fleury; Goulart, Gilberto Alessandre SoaresTo elaborate a better combination of Brazil nut (Bertholletia excelsa) and Baru (Dipteryx alata Vogel) in the development of the mixed water-soluble extract, with good physicochemical, physical and biological stability, a simplex centroid type mixture delineation was performed, a mixture between Brazil nut, Baru almond and water. The Brazil nut and Baru almond water-soluble extract obtained was packed in 220 mL glass bottles and pasteurized in stainless steel casing, then cooled and stored under refrigeration (4 degrees) until the physicochemical, physical, microbiological and sensory determinations. The determinations were performed in triplicate and the results were analyzed by the Statistica software and the mathematical models were generated, tested and validated. In order to obtain a better acceptance of the beverage, in both most accepted extracts in the sensorial analysis a fixed amount of 10,00% (w/v) sugar was added and the amount of preservatives for the reduction of residual taste, reduced. After the definition of the best mixture formulation, determined by global acceptance and purchase intention parameters, the water-soluble extract with the best grade was reprocessed in large scale and stored during 28 days, under 4 degrees refrigeration, evaluating the rheological profile and keeping up with the evolution of physicochemical, microbiological and sensorial analysis parameters. The formulation of water-soluble extract composed by 69.17% (w/w) of water, 9.17% (w/w) of Brazil nut and 21.67% of 10,00% (w/v) sucrose Baru almond was the favorite in the global acceptance test. The mathematical models obtained by the simplex centroid planning achieved better adjustments with the special cubic model proving to be highly predictive. The water-soluble extract presented non-newtonian pseudoplastic fluid behavior. The microbiological determinations did not demonstrate contamination of the beverage over the refrigerated storage time, indicating adequate hygienic handling during the processing and its good biological stability.