Introducción: La banana es una fruta tipo climatérica fuente de nutrientes, que puede ser utilizada para la obtención de subproductos, entre ellos, harinas y féculas. El objetivo fue producir harina de banana a partir de dos estadios de maduración y analizar sus características fisicoquímicas, tecnológicas y funcionales. Metodología: Se trabajó con bananas (Musa Cavendish var. nanica) en estadio I (verde; BVI) y IV (madura; BMIV). Las muestras se deshidrataron a 40°C durante 7 h (BVI) y 70 h (BMIV). En la fruta y en las harinas se estudiaron parámetros morfológicos, físicos (pH, acidez titulable y sólidos solubles), químicos (humedad, carbohidratos, proteínas, grasas y cenizas), tecnológicos índice de absorción de agua (IAA), índice de solubilidad en agua (ISA), poder de hinchamiento (PH) y funcionales fenoles totales (FT), flavonoides y capacidad antioxidante (CA). Resultados: Para BVI y BMIV se encontró una longitud de 20.83 y 21.3cm, grosor de cáscara 4 y 3mm, pH 5.3 y 4.8, acidez titulable 0.3 y 0.5%, sólidos solubles 1.2 y 9.6°Brix, humedad 63.0 y 75.8%, carbohidratos 33.3 y 20.4, proteínas 1.5 y 1.5 y grasas 1.3 y 1.1g/100g y FT 281.0 y 551.0 mgEAG/100g, flavonoides 65.4 y 168.5 mgEC/100g y CA 8.2 y 9.4% respectivamente. Para las harinas BVI y BMIV se obtuvo: IAA 2.6 y 3.2g/g, ISA 2.5 y 15.2% y PH 2.7 y 3.7g/g, pH 5.8 y 6.2, aw 0.5 y 0.4, humedad 10.7 y 13.0%, carbohidratos y proteínas 81.8 y 77.1 y 4.5 y 4.0 g/100g, FT 4078.2 y 3437.5 mgEAG/100g, flavonoides 333.6 y 634.1 mgEC/100g y CA 84.7 y 13.0% respectivamente. Conclusión: Fue factible producir y caracterizar harina de banana de dos estadios de maduración con parámetros nutricionales, tecnológicos y funcionales destacables lo cual permitiría su incorporación como ingrediente en la formulación de productos alimenticios. Financiación: Este trabajo fue apoyado por subvenciones del proyecto CIUNSa Tipo N° A 2362/0 “Formulación, evaluación y aplicación de alimentos con características saludables, para la prevención y/o tratamiento de enfermedades no transmisibles”.
Introduction: Andean lupin seeds are under-exploited sources of nutrients and bioactive compounds. Materials and methods: seeds were debittered to remove toxic alkaloids, partially defatted with 70% ethanol, dried at 60°C and milled. The defatted flour was suspended in water adjusted at pH 7 with 1N NaOH. The protein extract was filtered and spray-dried. Enriched yoghurts were obtained with the addition of lupin protein concentrate at 0.5, 1 and 1.5%. The chemical and fatty acid composition, the contents of polyphenols and flavonoids as well as the antioxidant activity were determined. The microbial quality and physicochemical properties (pH values, lactic acid content and percentage of syneresis) were evaluated in yoghurts during 28 days of storage. Results: Andean lupin concentrate showed high protein and carbohydrate contents (69% and 20%), unsaturated fatty acids (77%) mainly oleic, linoleic and α-linolenic acids as well as low atherogenic and thrombogenic indexes (0.07 and 0.44). The addition of the lupin protein concentrate at 1.5% into yoghurts increased the protein content. Enriched yoghurts showed higher unsaturated fatty acids, total polyphenol and flavonoid contents as well as lower atherogenic and thrombogenic indexes compared to the control. The lupin protein concentrate increased the ABTS radical scavenging activity, the ferric reducing power and the total antioxidant activity in yoghurts. Enriched and control yoghurts showed similar lactic acid bacterial counts. The counts for total and thermotolerant coliforms were under three MPN/mL and yeast and molds under 10 CFU/ mL. The pH values in enriched products were higher at days 1 and 7 of storage (4.82 and 4.95) compared to the control sample (4.72 and 4.85). The lactic acid content increased in all formulations at day 21. Enriched yoghurts showed lower syneresis than the control. Conclusions: Yoghurts enriched with lupin protein concentrate could represent nutritive and functional alternatives to prevent chronic diseases when consuming in a healthy diet.
Introduction: Snacks have become an important part of the daily diet, however, their nutritional profile could be improved by adding ingredients with health benefits. The aim of this work was to develop a functional dietetic snack using black carob flour and discarded blueberries, and to evaluate its chemical and functional composition. Methods: Three formulations were prepared using different proportions of wheat flour and black carob flour: 60:40; 50:50; and 40:60, respectively. Proximal chemical composition was determined by the procedures of AOAC methods and functional properties were also analyzed. Results: Three dietary snacks were obtained, which showed a caloric reduction of 20 - 23%. In all snacks, an increase in protein content of more than 60% was achieved and a higher total dietary fiber content (DS2) was observed compared to commercial snacks. All formulations showed a reduction in bioactive compound content during processing. Conclusions: The snacks showed functional properties, higher protein content and a reduced total caloric value compared to commercially available products. DS2 was the snack with the highest antioxidant activity and, according to fiber values, is a product with “high fiber content”. Despite the losses caused by the cooking process in the content of bioactive compounds, the antioxidant activity was greater than 50% in all the snacks produced.
Introduction: This study aimed to add value to Arabic Gum (AG) and the blueberry discarded harvest from Northwest of Argentina, developing functional dietary beverages with AG at three concentrations of 0; 5; 10 and 15 g/100 mL, and to assess the sensory acceptability, physicochemical characteristics and antioxidant properties. Material and methods: Blueberries (BB) at 30 g/100 mL and steviol glycosides (0.03 g/100 mL) were used. Results: The beverage with 10 g/100 mL of AG had the best scores for sensory acceptability and was preferred by consumers. It has a pH of 3.88, soluble solid content of 14.97 °Brix, density of 1.05 g/cm3 and a colour which showed a tendency from red to blue. The Total Caloric Value (per 100 mL of beverage) was 53.4 Kcal, 13.53 g of carbohydrates, 8.80 g of total dietary fibre, and a sodium content of 12.26 mg. The total polyphenol content was 214.23 mg GAE /100 g. Conclusions: The serving size of functional beverage covers 70% of the daily dietary fibre recommendation.
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