The aim of the study was to evaluate the effect of drying methods on the physical properties of pasta. Pasta was processed from durum wheat semolina and dried at low temperature in a drying oven, at very high temperature in a convection-air oven, and under reduced pressure in a vacuumdrier. Pasta after extrusion without drying was referred to as control. Cooking properties, color, and textural properties of the pasta were evaluated. The results show that drying method had a significant impact on the physical properties of pasta. Vacuum-drying resulted in bright yellow pasta characterized by high hardness, low adhesiveness, high water uptake, and low cooking losses. The study results demonstrate the beneficial effects of vacuum-drying on the physical properties of pasta.Efecto de los métodos de secado en las propiedades físicas de la pasta de trigo duro RESUMEN El objetivo de este estudio fue evaluar el efecto de los métodos de secado en las propiedades físicas de la pasta. Se procesó la pasta de semolina de trigo duro y se secó a baja temperatura en un horno de secado, a una temperatura muy alta en un horno de convección por aire, además de bajo presión reducida en un desecador al vacío. La pasta después de la extrusión sin secado se usó como muestra control. Se evaluaron las propiedades de cocinado, el color y las propiedades texturales de la pasta. Los resultados mostraron que el método de secado tuvo un impacto significativo en las propiedades físicas de la pasta. El desecado al vacío tuvo como resultado una pasta amarilla caracterizada por una alta dureza, una baja adhesión, un alto contenido de agua y una reducida pérdida de volumen en el cocinado. Los resultados de este estudio demostraron los efectos beneficiosos del desecado al vacío en las propiedades físicas de la pasta. ARTICLE HISTORY
β-glucan is currently one of the most important bioactive substances. Hence, there is a growing interest in the production of various foods containing β-glucan. The study examines the influence of the degree of wheat flour extraction in the quality of breads with high β-glucan content. Rheological tests were conducted on dough. Volume, mass, color and texture of bread were measured after baking. We observed that increasing the degree of extraction caused an increase in the storage and loss modulus. All of the bread made from the different flours were smaller in volume after the addition of β-glucan, although the yield increased. The crumb color of β-glucan-added breads was darker than the control samples. Control samples were higher in textural parameters (firmness, gumminess and chewiness). β-glucan-added samples had decreased porosity. The results revealed that using very strong flour with a high protein content results in a high quality β-glucan bread with a higher nutritional value due to the high total dietary fiber and β-glucan content.
In response to the growing interest of modern society in functional food products, this study attempts to develop a bakery product with high dietary fibre content added in the form of an oat fibre powder. Oat fibre powder with particle sizes of 75 µm (OFP1) and 150 µm (OFP2) was used, substituting 4, 8, 12, 16 and 20% of the flour. The physical properties of the dough and the final bakery products were then measured. Results indicated that dough with added fibre had higher elasticity than the control group. The storage modulus values of dough with OFP1 most closely approximated those of the control group. The addition of OFP1 did not affect significantly the colour compared to the other samples. Increasing the proportion of oat fibre powder resulted in increased firmness, which was most prominent in wheat bread rolls with oat fibre powder of smaller particle sizes. The addition of oat fibre powder with smaller particles resulted in a product with the rheological and colour parameters that more closely resembled control sample.
(2016) Effect of oat β-glucan fiber powder and vacuum-drying on cooking quality and physical properties of pasta, CyTA -Journal of Food, 14:1, 101-108, DOI: 10.1080/19476337.2015 To link to this article: https://doi.org/10. 1080/19476337.2015 Effect of oat β-glucan fiber powder and vacuum-drying on cooking quality and physical properties of pasta Efecto de la fibra de avena β-glucano en polvo y el secado al vacío en la calidad de cocinado y propiedades físicas de la pasta Monika Piwińska*, Jarosław Wyrwisz, Marcin Kurek, and Agnieszka Wierzbicka Oat β-glucan fiber powder was added to pasta dough at levels of 40, 80, 120, 160, and 200 g/kg. Pasta was dried at very high temperature and in a vacuum dryer. The cooking quality was evaluated based on the swelling index, water uptake, and cooking loss measurement. Further tests were carried out to determine the color, hardness, adhesiveness, total dietary fiber (TDF), and β-glucan content in pasta. The results showed that vacuum-drying had a significant impact on the cooking quality and physical properties of pasta. Water uptake and swelling index were higher and the cooking loss was lower in vacuum-dried pasta than in pasta dried using very high temperature (VHT) technology. The swelling index, water uptake, and cooking loss were significantly higher in samples with oat β-glucan fiber powder compared to control. Pasta with oat powder was darker, softer, and less sticky than semolina pasta. Lightness of vacuum-dried samples was higher while redness was lower than in conventionally dried samples.Keywords: vacuum-drying; β-glucan; dietary fiber; pasta Se añadió fibra de avena β-glucano en polvo a la masa de pasta a niveles 40, 80, 120, 160 y 200 g/kg. La pasta se secó a altas temperaturas en un secador al vacío. Se evaluó la calidad de cocinado en base al cálculo del índice de hinchazón, la absorción de agua y la pérdida de volumen en el cocinado. Se realizaron otras pruebas para determinar el color, la dureza, la adhesión, el total de fibra alimentaria y el contenido de β-glucano en la pasta. Los resultados mostraron que el secado al vacío tuvo un impacto significativo en la calidad del cocinado y las propiedades físicas de la pasta. La absorción de agua y el índice de hinchazón fueron mayores, aunque la pérdida de volumen en el cocinado fue menor en la pasta secada al vacío que con aquella secada con tecnología VHT. El índice de hinchazón, la absorción de agua y la pérdida de volumen en el cocinado fueron significativamente elevados en muestras con fibra de avena β-glucano en polvo en comparación con las muestras control. La pasta con avena en polvo resultó ser más oscura, suave y menos pegajosa que la pasta con semolina. La ligereza de las muestras secadas al vacío fue mayor, mientras que el color rojizo fue menor que en las muestras secadas de manera convencional.
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