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Effect of roasting times on bioactive compounds, fatty acids, polyphenol and nutrients of amaranth (Amaranthus cruentus L.) seed roasted in pan, and principal component analysis

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Abstract

In this study, the effect of roasting times on bioactive compounds, antioxidant capacity, fatty acids, polyphenol and nutrients of amaranth seed and oils roasted in pan at 120 °C was investigated. Total phenolic and flavonoid results of the seeds of unroasted (control) and roasted-amaranth were recorded between 48.81 (6 min) and 231.35 mg GAE/100 g (15 min) to 64.29 (6 min) and 144.29 mg/100 g (15 min), respectively. Antioxidant activities of unroasted and roasted-amaranth extracts were recorded between 5.50 (control) and 12.78 mmol/kg (15 min). L* values of amaranth seeds ranged from 51.21 to 78.53. Roasting for 3 min and 6 min was increased the L* values of samples, while roasting for 9–12 min caused a decrease in L* values. Gallic acid results of amaranth seeds were identified between 21.94 (control) and 71.06 mg/100 g (15 min). The linoleic acid results of amaranth seed oils were reported between 44.24 (control) and 45.76% (12 min). The highest amounts of elements in roasted and unroasted amaranth seeds were P, K,Ca, Mg and S. In general, it was observed that both macro and micro-elements of amaranth seed samples increased with the application of heat treatment. However, microelement contents differed depending on the roasting time.

Graphical abstract

In this study, the effect of thermal process times on total phenol, flavonoid, antioxidant activity, fatty acids, phenolic and minerals of amaranth seed and oils roasted in pan at 120 °C was investigated.

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Acknowledgements

The authors extend their appreciation to Researchers Supporting Project number (RSP2023R83), King Saud University, Riyadh, Saudi Arabia.

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Correspondence to Mehmet Musa Özcan.

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Al Juhaimi, F., Ahmed, I.A.M., Özcan, M.M. et al. Effect of roasting times on bioactive compounds, fatty acids, polyphenol and nutrients of amaranth (Amaranthus cruentus L.) seed roasted in pan, and principal component analysis. J Food Sci Technol 61, 129–138 (2024). https://doi.org/10.1007/s13197-023-05828-7

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