Actualmente los consumidores se preocupan cada día más por las nuevas tecnologías y piden que los alimentos sean lo más naturales, seguros y lo menos procesados posible. Por ello los aditivos alimentarios, como los estabilizantes (espesantes) deben ser también lo más naturales posibles, una alternativa es la extracción del hidrocoloide de la alga andina denominada "Cushuro", que abunda en nuestro país. El objetivo de este trabajo fue evaluar la influencia de los métodos de secado por liofilización y aire caliente, en el comportamiento reológico del hidrocoloide en polvo obtenido a partir de dos especies de Cushuro (N. Comune y N. Sphaericum). De la materia prima (alga fresca) proveniente de Catac - Recuay se extrajo el hidrocoloide y se deshidrató, obteniendo así un producto en seco. Luego las 4 muestras de hidrocoloide en polvo se diluyeron en agua al 0.15% y 0.25%, y se ev...

Present work proposes the substitution of traditional food stabilizers from the hydrocolloids of algae. Hydrocolloids from Nostoc commune and Nostoc sphaericum were extracted, characterized by infrared spectroscopy, and modelled their rheological behavior. The dried extract samples were dried by lyophilization and hot air and diluted in water at concentrations of 0.15% and 0.25% and lastly stored at different temperatures (7 – 80 °C). The infrared indicated C – O – C vibrations corresponding to the glucose cycle (1020 cm-1) and C = O of carboxyl groups (1950 cm-1) are proper of hydrocolloids. Rheological models of Bingham, Ostwald and Herschel-Bulkley confirmed that the Nostoc coomune species presents a higher coefficient of plastic viscosity (η) and coefficient of consistency (k) than Nostoc commune; the freeze drying method had a positive influence and significant on these resu...

Present work proposes the substitution of traditional food stabilizers from the hydrocolloids of algae. Hydrocolloids from Nostoc commune and Nostoc sphaericum were extracted, characterized by infrared spectroscopy, and modelled their rheological behavior. The dried extract samples were dried by lyophilization and hot air and diluted in water at concentrations of 0.15% and 0.25% and lastly stored at different temperatures (7 – 80 °C). The infrared indicated C – O – C vibrations corresponding to the glucose cycle (1020 cm-1) and C = O of carboxyl groups (1950 cm-1) are proper of hydrocolloids. Rheological models of Bingham, Ostwald and Herschel-Bulkley confirmed that the Nostoc coomune species presents a higher coefficient of plastic viscosity (η) and coefficient of consistency (k) than Nostoc commune; the freeze drying method had a positive influence and significant on these resu...