Starch from Colocasia esculenta (L.) Schott of purple and white esculenta varieties: Thermal, technological properties, and morphological study
Almidón de Colocasia esculenta (L.) Schott de variedades esculenta morada y blanca: Estudio de propiedades térmicas, tecnológicas y morfológicas
DOI:
https://doi.org/10.15446/rfnam.v77n3.111574Keywords:
Food industry, Gelatinization, Microstructure, Taro (en)Industria de alimentos, Gelatinización, Microestructura, Taro (es)
The high demand for starch in the food industry drives the search for new alternative sources for extraction. In this regard, Colocasia esculenta (L.) Schott, an edible root, is a promising alternative source for starch extraction. This study focused on correlating the technological and thermal properties with the microstructure and size distribution of starch from white and purple varieties. Starch granules with high thermal stability (132-258.3 °C) and good digestibility based on granule size (0.79-4.05 µm) were obtained. It was demonstrated that larger starch granules exhibit higher water absorption capacity (WAC) (139±0.53%). Moreover, the increase in WAC results in a higher gelatinization temperature (76.1±0.3 °C), which is favorable as it allows the use of this starch in food processing at high temperatures.
La alta demanda de almidón en la industria alimentaria provoca la búsqueda de nuevas fuentes alternativas para su extracción. En este sentido, Colocasia esculenta (L.) Schott es una raíz comestible que demuestra ser una buena fuente alternativa para la extracción de almidón. Este estudio se centró en relacionar las propiedades tecnológicas y térmicas con la microestructura y la distribución de tamaño del almidón de las variedades blanca y morada. Se obtuvieron gránulos de almidón con una alta estabilidad térmica (132-258,3 °C) y buena digestibilidad basada en el tamaño de los gránulos (0,79-4,05 µm). Se demostró que los gránulos de almidón más grandes originan mayor capacidad de absorción de agua (WAC) (139±0,53%), además el aumento de WAC genera una mayor temperatura de gelatinización (76,1±0,3 °C), este comportamiento es favorable, pues permite el uso de este almidón en el procesamiento de alimentos a altas temperaturas.
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