Abstract The effluent from the potato chips processing could be recovered and used in the biscuit formulations. This study aimed to evaluate the changes of sweet biscuits with partial replacement (45%) of wheat flour by recovered potato starch, packed in biaxial oriented polypropylene (BOPP), and stored under two controlled temperatures (25°C and 35°C). The changes of physical, chemical, microbiological and sensory characteristics of biscuits were evaluated for 6 months. Completely randomized design with 2x6 factorial arrangement was employed. In the first 36 days of biscuits storage was no increase in water activity and this remained constant up to 144 days of storage, up next. The score for sensory texture reduced over time, which shows that the tasters preferred less hard biscuits, since there was an increasing trend of instrumental hardness during storage, probably due to starch retrogradation, facilitated by higher moisture biscuits. Sweet biscuits of wheat flour and potato starch acidified and dehydrated have good physical and microbiological conditions, being able to be consumed for a period of 180 days. Potato starch recovered after acidified and dehydrated can be used as an ingredient in the products development for human consumption, avoiding losses and environmental pollution, and to generate economic gains.

Abstract Pumpkin seeds are considered waste and its composition has high protein content, being feasible for human consumption, also reducing costs in waste treatment. In this work we provided an alternative to reuse the wastes of pumpkin seed applied in cupcakes formulation as a complementary source to wheat flour. Four formulations with different proportions of pumpkin seed flour were investigated. The effects of partial wheat flour substitution were evaluated using the parameters texture, height, diameter, specific volume, color, proximate composition and scanning electron microscopy. The formulations used in this work consisted of a control, prepared with wheat flour and three provided of 25%, 50% and 75% of pumpkins seed flour in partial in partial replacement to wheat flour. The incorporation of pumpkin seed flour influenced products significantly (p <0.05), providing greater texture, cohesion, pH, soluble solids (Brix). According to results, the formulation with 50% pumpkin seed flour was considered the best proportion due to similarities with the formulation of 100% wheat flour besides high protein.

RESUMO A jabuticaba (Myrciaria cauliflora Berg) é um fruto muito apreciado, de importância nutricional, encontrado na maior parte do território brasileiro. Sua casca é um subproduto descartado nas agroindústrias brasileiras. Conduziu-se este trabalho com o objetivo de desenvolver formulações de cookies com substituições parciais da farinha de trigo (FT) e farinha de aveia (FA) pela farinha de casca de jabuticaba (FCJ), analisar os aspectos tecnológicos dos cookies elaborados, além de verificar a aceitação do produto selecionado. Para elaboração do cookie, utilizou-se metodologia de superfície de resposta e delineamento de misturas. Todos os modelos de regressão dos cookies foram significativos. Cookies com FCJ tendem a espessuras menores, maior ISA e IAA, além de possuírem menores valores de força de ruptura e diminuição dos parâmetros de cor (L*, a* e b*), comparados ao padrão. Cookies com maiores frações de FA apresentaram maiores valores de volume específico. Tanto o padrão quanto o cookie selecionado no teste de desejabilidade foram aceitos por escolares. Neste trabalho apresentou-se uma nova possibilidade de produção de cookie à base de um coproduto agroindustrial, sendo interessante do ponto de vista comercial a jabuticaba e ao mercado desse tipo de produto.

ABSTRACT Jabuticaba (Myrciaria cauliflora Berg) is agreatly appreciated fruit with nutritional importance, primarily found in the majority of Brazil. Its peel is a discarded by-product of the Brazilian agroindustry. The objective of this study was to develop cookie formulations with partial replacement of wheat flour (WF) and oat flour (OF) by jabuticaba peel meal (JPF), analyzing the technological aspects of the elaborate cookies and evaluating the acceptance of the selected product. All regression models of the cookies with JPF flour were significant. Cookies with JPF tended to blemish and had smaller thicknesses, greater ISA and IAA, smaller values of breaking strength and decreased color parameters (L*, a* and b*) compared to standard cookies. Cookies made with larger OF fractions had lower values of specific volume. Both the standard and the selected cookies from the cookie desirability test were deemed acceptable among students. This work presents a new possibility to produce cookies based on an agro-industrial co-products, which is interesting for the market for this type of product.

This study aimed to define the process conditions to obtain snacks from the by-products of rice and soybean with physical characteristics suitable for marketing. Therefore, the effects of moisture and extrusion temperature on the expansion and color of the products obtained experimentally obtained were evaluated, and the proximate composition of the by-products and that of the snack with greater desirability were determined. Response surface methodology and rotational central composite design were used, and desirability test based on the regression models adjusted was applied. The most desirable snack, with the highest expansion index (3.39), specific volume (13.5 mL.g-1), and the chromaticity coordinate a* (2.79), was obtained under 12 g.100 g-1 moisture and 85ºC of temperature in the third zone of the extruder. The snack produced under these conditions attained content of protein and lipid content 41 and 64% higher than that of the traditional corn snack. It can be concluded that producing extruded snack made form a mixture of broken grains, rice bran, and soybean okara (81:9:10) is technologically feasible, enabling the development of a new product with good nutritional value that can improve the diet of children, the main consumers of this type of food.