Effect of High-Protein and High-Fiber Breaders on Oil Absorption and Quality Attributes in Chicken Nuggets.

Consumption of fried foods is associated with a higher risk of cardiovascular and other diseases; therefore, consumers are looking to reduce fat intake. We evaluated the effect of high-protein breaders and fiber on oil absorption and quality attributes in chicken nuggets, using flour blends (wheat, chickpea, coconut, oil-quinoa-chia), soy protein concentrate, and brewers' spent grain. We evaluated the chemical composition, water and oil retention capacity (ORC), viscosity profile, and flour particle size distribution, along with the developed breaders (Formulation 1 and 2) and a commercial breader (CB), in addition to texture, color, fat, and moisture contents of the fried chicken nuggets prepared with the developed breaders and the CB. The total dietary fiber content (TDF) of the nuggets breaded with only Formulation-1 and CB was determined. Nuggets breaded with Formulation-1 showed lower (p ≤ 0.05) ORC, better moisture retention (67.6%), and more TDF (4.5% vs. 2.3%, p ≤ 0.05) compared to CB-breaded nuggets. Nuggets with Formulation-1 showed the expected texture and color characteristics for fried products. Formulation-1 has the potential to be used as a breader due to its moisture, reduced ORC, and the texture and color it imparts to the fried nuggets, providing higher amounts of nutrients and possible health benefits.

Arabinoxylans Release from Brewers' Spent Grain Using Extrusion and Solid-State Fermentation with Fusarium oxysporum and the Antioxidant Capacity of the Extracts.

Brewers' spent grain (BSG) is the most abundant byproduct generated from the beer-brewing process. BSG is a material rich in hemicellulose, composed of arabinoxylans (AX). However, the high crosslinking of this material causes low availability of AX, for which it is necessary to apply different treatments. The objective of this research is to increase the release of arabinoxylans through solid-state fermentation with Fusarium oxysporum f. sp. lycopersici using extruded brewery spent grain. First, the BSG is subjected to two types of physical treatments: extrusion at 20% moisture, 200 rpm and 50 °C (BSGe), and blade milling (BSGm). The chemical composition is determined for each sample (BSG, BSGe and BSGm). Subsequently, the solid-state fermentation process (SSF) is carried out on each sample. The fermentation kinetics at 30 °C are monitored for 7 days. Once the SSF concludes, AX are extracted, and the purity of AX is determined by the phloroglucinol colorimetric assay. Finally, the total phenolic compounds, phenolic acids and antioxidant capacity by DPPH are quantified. No significant differences (p ≥ 0.05) in the protein, lipid, ash or total dietary fiber contents are found among the samples. No significant difference (p ≥ 0.05) in the content of soluble fiber is found, although BSGe and BSGm have higher values than BSG. On the other hand, the yields of soluble AX exhibit significant differences (p ≤ 0.05) among nonfermented samples (BSG, 0.03%; BSGm, 0.53%; BSGe, 0.70%) and with SSF (BSG, 2.95%; BSGm, 6.24%; and BSGe, 9.58%). In addition, the contents of free phenolic compounds and free phenolic acids and the percent inhibition of free extracts by 2,2-diphenyl-1-picrylhydrazyl (DPPH) differ significantly (p ≤ 0.05) between samples subjected to SSF and nonfermented samples. Therefore, extrusion and SSF treatment increase AX release from BSG as well as the antioxidant capacity of the extracts.

Phenolic Acids, Antioxidant Capacity, and Estimated Glycemic Index of Cookies Added with Brewer's Spent Grain.

Brewers' spent grain (BSG) is the major by-product of the brewing industry, with great potential as a functional ingredient due to its bioactive compounds. Thus, BSG could be suitable for improving the low nutritional quality of wheat-based snacks highly consumed by young people. The objective of this study was to substitute wheat flour with BSG (0, 10, 20, and 30%) for cookies elaboration, and evaluate the dough rheology, phenolic acids, antioxidant capacity, arabinoxylans content and proximate composition of the cookies Protein content and bioactive compounds (ferulic and p-coumaric acids, water unextractable arabinoxylans) of cookies significantly (p < 0.05) increased with the substitution level. In comparison to the wheat-alone cookies, the 20% BSG-containing cookies showed a lower hydrolysis and glycemic index (GI), and less total starch. The low cost, protein-rich BSG with antioxidant capacity improves the nutritional quality of cookies and may confer health benefits beyond basic nutrition.

Formulación y elaboración de pastelillos tipo brownies con más fibra y menos calorías que los convencionales

Se prepararon distintas formulaciones para pastelillos de chocolate (brownies) sustituyendo 15, 20 y 25% de la harina de trigo con inulina. Se evaluaron las características del batido de cada una de las formulaciones y se sometieron al proceso de horneado a 175 oC por 45 min. Después del horneado, los brownies se dejaron enfriar por 1 h y posteriormente se empacaron en charolas de poliestireno cristal y se les evaluó textura a los 1, 3, 7 y 15 días de almacenamiento a temperatura ambiente (25 oC) y 65% de humedad relativa. En base a las evaluaciones del batido y a las propiedades texturales de los brownies durante el almacenamiento, se seleccionó la formulación con 20% inulina como la mejor. Se analizó composición proximal y cuantificó fibra dietética total, soluble e insoluble, tanto al brownie control y al de 20% de inulina, como a un brownie comercial. El brownie con 20% de inulina presentó menor firmeza, gomosidad y masticabilidad que el control, mayor contenido de proteína y menor contenido de grasa (6,3 vs 26,3%) y aporte calórico (331,4 vs 467,9 kcal/100 g) con respecto al brownie comercial. El brownie con 20% de inulina mostró el doble de fibra dietética total y 22 veces más fibra soluble que el brownie control. La aceptabilidad del brownie con 20% inulina fue similar a la del brownie control. La incorporación de inulina en la elaboración de brownies permitió reducir el aporte calórico y aumentar el contenido de fibra soluble, sin afectar adversamente la textura de los pastelillos.

Formulation and elaboration of lowenergy and high fiber-containing brownies. Different formulations for chocolate pastries making (brownies) were prepared by substituting 15, 20, and 25% of the wheat flour by inulin. The batter characteristics of each formulation were evaluated and the batters were baked at 175 oC for 15 min. After baking, the brownies were allowed to cool, put into crystal polystyrene trays, and their texture after 1, 3, 7, and 15 days of storage at room temperature (25 oC) and 65% of relative humidity, was evaluated. Based on the evaluations of batter characteristics and brownies textural properties during storage, the formulation containing 20% of inulin was the best. Proximate analysis was determined, and total, soluble and insoluble dietary fiber were quantified for brownies control and 20% inulin ones, as well as commercial brownies. The brownies containing 20% inulin showed lower firmness, gumminess, and masticability than the control and higher protein and lower fat content (6,3 vs 26,3%) and caloric value (331,4 vs 467.9 kcal/100 g) in comparison to the commercial brownies. The brownie with 20% inulin had twice the total dietary fiber and 22 times more soluble fiber than the brownie control. The acceptability of the brownie with 20% inulin was similar to that of the control. The incorporation of inulin in the production of brownies allowed to reduce the caloric value and to increase the soluble fiber content without adverse effects in texture of the pastries.

[Formulation and elaboration of low-energy and high fiber-containing brownies]. / Formulación y elaboración de pastelillos tipo brownies con más fibra y menos calorías que los convencionales.

Different formulations for chocolate pastries making (brownies) were prepared by substituting 15, 20, and 25% of the wheat flour by inulin. The batter characteristics of each formulation were evaluated and the batters were baked at 175 degrees C for 15 min. After baking, the brownies were allowed to cool, put into crystal polystyrene trays, and their texture after 1, 3, 7, and 15 days of storage at room temperature (25 degrees C) and 65% of relative humidity, was evaluated. Based on the evaluations of batter characteristics and brownies textural properties during storage, the formulation containing 20% of inulin was the best. Proximate analysis was determined, and total, soluble and insoluble dietary fiber were quantified for brownies control and 20% inulin ones, as well as commercial brownies. The brownies containing 20% inulin showed lower firmness, gumminess, and masticability than the control and higher protein and lower fat content (6,3 vs 26,3%) and caloric value (331,4 vs 467.9 kcal/100 g) in comparison to the commercial brownies. The brownie with 20% inulin had twice the total dietary fiber and 22 times more soluble fiber than the brownie control. The acceptability of the brownie with 20% inulin was similar to that of the control. The incorporation of inulin in the production of brownies allowed to reduce the caloric value and to increase the soluble fiber content without adverse effects in texture of the pastries.