Antioxidant and functional properties of a high dietary fibre powder from carambola (Averrhoa carambola L.) pomace |
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| Authors: | Maria del Rosario Pantaleón‐Velasco Irving Israel Ruiz‐López Araceli Pérez‐Silva Laura Bravo‐Clemente Raquel Mateos Héctor Ruiz‐Espinosa Maria de los Angeles Vivar‐Vera |
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| Affiliation: | 1. Coordinación de Posgrado, Depto. de Ingeniería Química y Bioquímica, Instituto Tecnológico de Tuxtepec, , Tuxtepec, Oaxaca, C. P. 68350 México;2. Facultad de Ingeniería Química, Benemérita Universidad Autónoma de Puebla, , Puebla, Puebla, C. P. 72570 México;3. Department of Metabolism and Nutrition, Instituto de Ciencia y Tecnología de Alimentos y Nutrición (ICTAN‐CSIC), Consejo Superior de Investigaciones Científicas, , Madrid, 28040 Spain |
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| Abstract: | The use of carambola pomace as a raw material for the production of a high dietary fibre powder (HDFP) was investigated. A face‐centred design was used to study the effects of extraction conditions, namely water‐to‐pomace ratio, time and temperature, on both reducing sugars (RS) and total extractable polyphenols (EPP) contents of fibre concentrate. RS content decreased by increasing extraction times and water‐to‐pomace ratios, while EPP tend to diminish by increasing temperature and contact time (P < 0.01). Selected HDFPs showed an EPP content in the range of 5.0–6.1 g GAE 100 g?1 dry basis (db), with antioxidant activities between 386.2–443.9 and 204.7–228.6 μmol Trolox equivalents g?1 db according to FRAP and ABTS assays, respectively. HDFP obtained at 55 °C, 5 min and 2:1 water‐to‐pomace ratio exhibited the highest EPP content, total dietary fibre (84.0% db) and dietary indigestible fraction (61.3% db). This product can be considered as a potential valuable food ingredient considering their oil retention and swelling capacities. |
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| Keywords: | Antioxidant activity carambola pomace functional properties high dietary fibre powder polyphenols |
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