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Influence of γ-irradiation on physicochemical, functional, proximate, and antioxidant characteristics of pigmented rice flours

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Abstract

In recent years, food irradiation using γ-rays is one of the most valuable practices for insect disinfestation in rice grains for extended shelf life. In this study, flours from four pigmented rice cultivars were exposed to γ-irradiation using 60Co at different doses (0, 5, 10, and 15 kGy). The impact of γ-irradiation on the physico-chemical, functional, and morphological characteristics of pigmented rice flours were analyzed. Results revealed that reduction in amylose content, pH, bulk density, tapped density, and syneresis, while solubility, water absorption capacity, and swelling power values increased significantly (p < 0.05). Pasting characteristics of pigmented rice flours also reduced after exposure to γ-irradiation. Morphological features of pigmented rice flour granules revealed no evidence of physical destruction after irradiation except for black kavuni flour. The structural analysis by FTIR confirms no effect of γ-irradiation on pigmented rice flours. Overall, the study revealed that irradiated pigmented rice flours with enhanced functional properties of less than 10 kGy can be effectively used in the development of value-added rice-based food products considering all the beneficial and safety aspects.

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Acknowledgements

The first and second author is thankful to the University Grants Commission, New Delhi, India for granting financial assistance in the form of Junior Research Fellowship (Grant No. 12688/NET-DEC 2013 and Grant No. 1538/NET-JUNE 2013). Thanks to SVR Sriram for his kind support for providing the raw materials in time.

Funding

Pondicherry University, Puducherry, India.

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Authors and Affiliations

  1. Department of Food Science and Technology, Pondicherry University, Pondicherry, 605014, India

    M. Smita, K. Meera, Haripriya Sundaramoorthy, Dolly Jha, B. Chander Mohan & G. Pavithraa

  2. Department of Microbiology and Food Science & Technology, School of Science, GITAM (Deemed to be University), Visakhapatnam, 530045, India

    Chagam Koteswara Reddy

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  1. M. Smita
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  2. K. Meera
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  4. Dolly Jha
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  5. B. Chander Mohan
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  6. G. Pavithraa
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  7. Chagam Koteswara Reddy
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Contributions

SM: Investigation, Methodology, Writing – Review and Editing; MK: Conceptualization, Methodology, Writing—original draft, Data curation; SH: Conceptualization, Supervision, Writing—Review and Editing; JD: Formal analysis, Visualization, Investigation; CMB: Formal analysis, Visualization, Investigation; PG: Formal analysis, Investigation; CKR: Writing—Review and Editing. The article has not been submitted for publication in any other journal and this submission is with the approval by all the authors.

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Correspondence to Haripriya Sundaramoorthy or Chagam Koteswara Reddy.

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Smita, M., Meera, K., Sundaramoorthy, H. et al. Influence of γ-irradiation on physicochemical, functional, proximate, and antioxidant characteristics of pigmented rice flours. J Food Sci Technol 60, 1621–1632 (2023). https://doi.org/10.1007/s13197-023-05709-z

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  • DOI: https://doi.org/10.1007/s13197-023-05709-z

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