Functionality modulation of starch from lotus rhizome using single and dual physical modification

• Published in: Industrial crops and products 2024-12, Vol.221, p.119371, Article 119371
• Main Authors: Dhull, Sanju Bala, Chandak, Ankita, Goksen, Gulden, Chawla, Prince, Obaid, Sami Al, Ansari, Mohammad Javed
• Format: Article
• Language: English
• Subjects: Digestibility; Lotus; Modification; Starch; Ultrasonication
• ISSN: 0926-6690
• DOI: 10.1016/j.indcrop.2024.119371

The effects of ultrasonication (US) assisted by pre- and post-treatment of heat-moisture treatment (HMT) on physicochemical, rheological, pasting, digestive, and thermal properties of lotus rhizome (LR) starch were investigated in this study. All treatments decreased the swelling power, amylose content, and peak viscosity except for the ultrasonicated sample when compared with native LR starch. All treatments showed similar diffraction patterns with different intensities. FTIR spectra characteristic peaks did not emerge or disappear after single and dual modifications. Storage modulus (G′) is greater than loss modulus (G″) for all LR starch gel samples demonstrating their elastic character. Moreover, ΔHgel (253.1–303.7 J/g) increased in all treatments. Dual modification (HMT & US) significantly enhanced resistant starch and reduced SDS in LR starches. These results could be beneficial for promoting ultrasound processing for potential uses in the food industry and starch production. [Display omitted] •The effects of single and dual modification on properties of lotus rhizome starch were investigated.•Lotus rhizome starch was modified using HMT and ultrasonication (US).•The sequence of dual modification was altered to see its effect on starch properties.•Dual modification of HMT & US significantly enhanced resistant starch content.