The aimed of this study was quantified total phenols content, total flavonoids, and antioxidant activity in extruded ready-to-eat products made from yellow corn added with apple pomace powder. A central composite rotatable experimental design was used. The variables tested were exit die temperature (140-180 °C), feed moisture (14-20 g/100 g) and apple pomace concentration (0-30 g/100 g). The effect of the process variables on the total contents of phenols, flavonols, flavanols and flavonoids and antioxidant activity was evaluated using the response surface methodology. The data of each response were fitted to a second-order model with determination coefficients ≥ 0.71. The extruded product with no added apple bagasse showed the lowest values of the evaluated phytochemicals but had higher antioxidant activity by DPPH. The addition of apple pomace increased the phytochemical content and antioxidant activity in extruded ready-to-eat products made with yellow corn. This makes it possible to obtain a formulation of an extruded food rich in phenolic compounds with potential to contribute to prevention of oxidative stress, while making use of agro-industrial waste from apple juice extraction.

Summary The objective of this research was to study the effect of partially substituting semolina flour by native (NCHF) and modified chayotextle (CHFMD) flours, on the physicochemical properties and cooking quality of spaghetti. Spaghetti was obtained by replacing semolina flour (control) with five different concentrations of NCHF and CHFMD flours (10%, 17.5%, 25%, 32.5% and 40%). The proximal composition of the flours showed that both NCHF and CHFMD flours lower content of protein and fat but higher content of ash and resistant starch (RS). Moreover, the RS content increased due to thermal modification (TM) and that RS remained high, even after the cooking process. Pasting properties such as peak viscosity, breakdown, setback and final viscosity were influenced by NCHF and CHFMD concentrations. Brightness (ΔL*) was significantly reduced by inclusion of increasing CHFMD levels. True density and water absorption values increased with addition of NCHF and CHFMD, compared to the control spaghetti. The results obtained in this study demonstrated the possibility for producing spaghetti containing up to 40% CHFMD flour, with acceptable quality and functional properties.

La adición de compuestos bioactivos tales como antioxidantes y antimicrobianos a películas biodegradables, puede mejorar sus propiedades funcionales y convertirlas en empaques activos, a ello se complementan nuevas tecnologías como el uso de nanoencapsulación, con el fin de atender a la problemática de seguridad y calidad a la que hoy en día se enfrenta la industria alimentaria.

No abstract

Breakfast cereals have health benefits in combination with a balanced diet; They play an important role in the diet since they ensure the proper functioning of the organism, the nervous system and the gastrointestinal tract. One of the most used technologies currently in the preparation of breakfast cereals, is extrusion. Therefore, the objective of this study was to obtain an extruded cereal high in fiber, based on tuberous Oxalis flour and oat fiber, with acceptable physicochemical properties (expansion index, bulk density, absorption and solubility in water). Five treatments were obtained by means of extrusion. The highest value of expansion index was obtained by treatment 5 (13% humidity-100% Oxalis tuberosa flour). The apparent density results were in a range of 0.13-0.51 g / ml, treatment 4 and treatment 2, respectively. The results for water absorption index were in a range between 2.8-4.2 g H20 / g sample, obtaining the lowest value for treatment 4. The water solubility index results showed that the highest value was obtained for the water solubility index. treatment 5 and the lowest for T1 and T2.