Abstract
Worldwide peanuts are often thermally processed before consumption, which might alter its bioactive composition and toxicity. The presented work explores the effect of processing methods such as roasting, frying, and pressure cooking on the bioactive composition, polyphenol profiles, aflatoxin concentration and, allergenicity response of peanuts. Effect of processing methods was assessed by monitoring total polyphenol content (TPC), total flavonoid content (TFC), antioxidant activity by DPPH & ABTS radicals, sensory analysis and, indirect ELISA. Compared to raw peanuts, all processing methods caused significant differences in TPC, TFC, DPPH & ABTS radical scavenging activities. Comparison of polyphenol profiles of raw to processed peanuts by LC–ESI–Q–TOF–MS chromatograms revealed different effects on concentrations of individual bioactive polyphenols. Indirect ELISA showed a significant decrease in the assay response on pressure cooking as compared to other samples. Total aflatoxin concentration was significantly reduced after processing in roasted (97.7%) and fried (98.3%) peanuts. Optimum processing conditions based on bioactive concentration and sensory analysis were found to be, roasting: 150 °C for 10 min, frying: 170 °C for 2 min and, pressure cooking: 15 min. Polyphenol profiles and bioactive constituents of peanuts were influenced by processing and may alter health benefits associated with them hence, vital for research and food industry applications.
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Acknowledgements
Authors acknowledge the University Grants Commission, New Delhi, Government of India, for providing financial support under UGC-BSR Fellowship Award No. F.4-1/2006(BSR)/5-62/2007(BSR). The authors sincerely thank Ms. Harsha Bhavnani for her help with peanut allergy analysis.
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Salve, A.R., LeBlanc, J.G. & Arya, S.S. Effect of processing on polyphenol profile, aflatoxin concentration and allergenicity of peanuts. J Food Sci Technol 58, 2714–2724 (2021). https://doi.org/10.1007/s13197-020-04779-7
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DOI: https://doi.org/10.1007/s13197-020-04779-7