Effect of gamma irradiation and pyrolysis on indigestible fraction, physicochemical properties, and molecular structure of rice starch

Journal of Food Processing and PreservationVolume 45, Issue 10 e15880 ORIGINAL ARTICLE Effect of gamma irradiation and pyrolysis on indigestible fraction, physicochemical properties, and molecular structure of rice starch Nguyen Duy Lam, Corresponding Author Nguyen Duy Lam nguyenduylam16@gmail.com Vietnam Institute of Agricultural Engineering and Postharvest Technology, Hanoi, Vietnam Correspondence Nguyen Duy Lam, Vietnam Institute of Agricultural Engineering and Postharvest Technology, 60 Trung Kinh, Cau Giay, Hanoi, Vietnam. Email: nguyenduylam16@gmail.com Tran Dai Lam, Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam. Email: tdlam@itt.vast.vnSearch for more papers by this authorTran Minh Quynh, Tran Minh Quynh Hanoi Irradiation Center, Hanoi, VietnamSearch for more papers by this authorTran Bang Diep, Tran Bang Diep Hanoi Irradiation Center, Hanoi, VietnamSearch for more papers by this authorPham Thi Binh, Pham Thi Binh Department of Food Technology, Bac Giang Agriculture and Forestry University, Bac Giang, VietnamSearch for more papers by this authorTran Dai Lam, Corresponding Author Tran Dai Lam tdlam@itt.vast.vn orcid.org/0000-0003-1364-8001 Institute for Tropical Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam Correspondence Nguyen Duy Lam, Vietnam Institute of Agricultural Engineering and Postharvest Technology, 60 Trung Kinh, Cau Giay, Hanoi, Vietnam. Email: nguyenduylam16@gmail.com Tran Dai Lam, Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam. Email: tdlam@itt.vast.vnSearch for more papers by this author Nguyen Duy Lam, Corresponding Author Nguyen Duy Lam nguyenduylam16@gmail.com Vietnam Institute of Agricultural Engineering and Postharvest Technology, Hanoi, Vietnam Correspondence Nguyen Duy Lam, Vietnam Institute of Agricultural Engineering and Postharvest Technology, 60 Trung Kinh, Cau Giay, Hanoi, Vietnam. Email: nguyenduylam16@gmail.com Tran Dai Lam, Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam. Email: tdlam@itt.vast.vnSearch for more papers by this authorTran Minh Quynh, Tran Minh Quynh Hanoi Irradiation Center, Hanoi, VietnamSearch for more papers by this authorTran Bang Diep, Tran Bang Diep Hanoi Irradiation Center, Hanoi, VietnamSearch for more papers by this authorPham Thi Binh, Pham Thi Binh Department of Food Technology, Bac Giang Agriculture and Forestry University, Bac Giang, VietnamSearch for more papers by this authorTran Dai Lam, Corresponding Author Tran Dai Lam tdlam@itt.vast.vn orcid.org/0000-0003-1364-8001 Institute for Tropical Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam Correspondence Nguyen Duy Lam, Vietnam Institute of Agricultural Engineering and Postharvest Technology, 60 Trung Kinh, Cau Giay, Hanoi, Vietnam. Email: nguyenduylam16@gmail.com Tran Dai Lam, Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam. Email: tdlam@itt.vast.vnSearch for more papers by this author First published: 17 August 2021 https://doi.org/10.1111/jfpp.15880Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract This study aims at evaluating the effect of gamma irradiation and pyrolysis on the physicochemical and structural properties of rice starch. It is found that while in the single mode, the contribution of the pyrolysis to indigestible fraction (IDF) content is 21.74 g/100 g, the irradiation at doses of 10, 30, and 50 kGy gave IDF values of 4.47, 6.63, and 9.89 g/100 g, respectively; in the combined mode (when the successive treatment of the irradiation and the pyrolysis was applied), IDF rise sharply, up to 43.72, 47.95, and 52.24 g/100 g, respectively. XRD patterns and FTIR spectra suggest that single mode of irradiation, pyrolysis as well as their combined mode kept the structure and functional group characteristics of rice starch intact, opening a potential approach toward food and non-food application of irradiation treatment in resistant dextrin production by acidic catalyst-free pyrolysis. Practical applications The results of this study showed that gamma irradiation significantly increased the content of indigestible fraction (IDF) to a high level. Combined treatment of irradiation and pyrolysis caused a series of synergic effects on IDF and water solubility in treated starches. The irradiation effectively promoted the pyrolysis reaction as an acidic catalytic agent, therefore suggest a novel potential for food application of radiation treatment in the production of resistant dextrin at high content by acidic catalyst-free pyrolysis. Open Research DATA AVAILABILITY STATEMENT The authors confirm that the data supporting the findings of this study are available within the article. Volume45, Issue10October 2021e15880 RelatedInformation