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Combined effect of heat moisture and ultrasound treatment on the physicochemical, thermal and structural properties of new variety of purple rice starch.
- Source :
-
International Journal of Biological Macromolecules . Mar2024:Part 2, Vol. 261, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- The advantages of physically modifying starch are evident: minimal environmental impact, no by-products, and straightforward control. The impact of dual modification on starch properties is contingent upon modification conditions and starch type. Herein, we subjected purple rice starch (PRS) to heat-moisture treatment (HMT, 110 °C, 4 h) with varying moisture content, ultrasound treatment (UT, 50 Hz, 30 min) with different ultrasonic power, and a combination of HMT and UT. Our findings reveal that UT following HMT dispersed starch granules initially aggregated by HMT and resulted in a rougher granule surface. Rheological analysis showcased a synergistic effect of HMT and UT, enhancing the fluidity of PRS and reinforcing its resistance to deformation in paste form. The absorbance ratio R 1047/1015 indicates that increased moisture content during HMT and high ultrasound power for UT reduced the short-range order degree (1.69). However, the combined HMT-UT exhibited an increased R 1047/1015 (1.38–1.64) compared to HMT alone (1.29–1.45), likely due to short-chain rearrangement. Notably, the A-type structure of PRS remained unaltered, but overall crystallinity significantly decreased (23.01 %–28.56 %), consistent with DSC results. In summary, physical modifications exerted significant effects on PRS, shedding light on the mechanisms governing the transformation of structural properties during HMT-UT. • Purple rice starch subjected to heat moisture and ultrasound treatments (HMT-UT) • HMT with higher moisture changed crystallinity and rheological properties more. • The combined HMT-UT improved the starch's fluidity and resistance to deformation. • HMT-UT significantly reduced the short- and long-range ordered structures. • Theoretical support for applying the dual modification of purple rice starch [ABSTRACT FROM AUTHOR]
- Subjects :
- *RICE starch
*RICE
*THERMAL properties
*ULTRASONIC imaging
*MOISTURE
*RHEOLOGY
Subjects
Details
- Language :
- English
- ISSN :
- 01418130
- Volume :
- 261
- Database :
- Academic Search Index
- Journal :
- International Journal of Biological Macromolecules
- Publication Type :
- Academic Journal
- Accession number :
- 175936738
- Full Text :
- https://doi.org/10.1016/j.ijbiomac.2024.129748