Abstract
In this study, wheat starch, A- and B-type starch granules were firstly treated with citric acid (CT) and then subjected to heat-moisture treatment (HMT). The maximum thermo-stable resistant starch (RS) contents reached 71.52%, 71.27%, 71.58% for CT-HMT wheat starch, A- and B-type starch granules, respectively. The hydrolysis kinetic parameters (C∞ and k) reduced after CT-HMT. Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) results revealed that the endothermic and crystalline peaks of CT-HMT starch samples disappeared. Scanning electron microscopy (SEM) results showed that more collapses and destructiveness appeared on the surfaces of CT-HMT starch granules. The esterification reaction became stronger during HMT according to Fourier transform-infrared (FT-IR) spectroscopy analysis, which was consistent with the results of degree of substitution. Raman spectroscopy presented similar structural properties results with XRD and FT-IR. These results suggest that CT prior to HMT is a useful method for preparing high amount of thermally stable RS.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
