The aim of this research was to evaluate the influence of sweet potato peel flour (SPPF) on the physicochemical, technological and sensorial characteristics of bovine hamburger. Four hamburger formulations were prepared added SPPF: F1 (0%), F2 (0.75%), F3 (1.5%) and F4 (2.25%). The flour was characterized by high levels of minerals, carbohydrate and dietary fiber, which improved the nutritional profile of the hamburger. There was an increase in moisture retention and shrinkage, as well as a reduction in fat retention and cooking yield, as the level of SPPF addition increased. The addition of flour in the product significantly reduced (p < 0.05) the values of L*, a* and b*. Similar acceptability to the standard sample was checked for the hamburger with the addition of up to 1.5% SPPF. However, all formulations had an acceptability index greater than 70%. It is concluded that SPPF is a potential ingredient to be added in bovine hamburger, improving nutritional and technological parameters and with low influence on the sensorial characteristics.

The aim of this study was to evaluate the influence of fat substitution by fructooligosaccharide on physicochemical, technological and sensory characteristics of hamburgers. Five hamburgers formulations were prepared: F1 - standard (0% FOS) and the others added 1.25% (F2), 2.50% (F3), 3.75% (F4) and 5% (F5) of FOS. The Acceptability similar to standard sample was found for hamburgers with up to 3.75% prebiotic addition. However, all formulations had acceptability index above 70%. Cooking yield, moisture retention, shrinkage and fat retention have been increased as FOS was added. Substitution of fat by FOS increased carbohydrate and fiber content and decreased lipid and calorie hamburgers content. FOS addition did not change red and yellow values, however it increased brightness of product. FOS is an ingredient with potential for addition in beef hamburger, improving physicochemical and technological parameters and with little influence on sensory characteristics.

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The current study aimed to evaluate the influence of the addition of pumpkin peel flour (PPF) on physicochemical, cooking and sensory characteristics of bovine burger. Five hamburgers were formulated: F1 - standard (0% PPF) and the others added 1% (F2), 2% (F3), 3% (F4) and 4% (F5) of PPF. The PPF was characterized by high contents of minerals, carbohydrate and dietary fiber, which improved nutritional profile of hamburger. There was an increase on cooking yield, moisture retention and reduction of shrinkage and fat retention, as the level of PPF addition increased. The incorporation of PPF at 3% and 4% in the product increased significantly (p<0.05) the values of L*, a* and b*. Similar acceptability to the standard sample was verified on products with addition of up to 3% PPF. All formulations showed an acceptability index greater than 70%. Thus PPF is a potential ingredient for the formulation of bovine burger to improve its nutritional and technological properties without modification of the sensorial characteristics.