Structural and functional characterization of RS III produced from gelatinized, enzyme-hydrolyzed and retrograded sweet potato starch
The demand for the application of resistant starch as a functional ingredient is growing, thus, the analysis of its structural, thermal and digestibility properties can help food producers in optimizing industrial applications. The effect of autoclaving (120 °C/30 min) - debranching (2% pullulanase/...
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Published in | Journal of food measurement & characterization Vol. 11; no. 2; pp. 792 - 800 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
New York
Springer US
01.06.2017
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | The demand for the application of resistant starch as a functional ingredient is growing, thus, the analysis of its structural, thermal and digestibility properties can help food producers in optimizing industrial applications. The effect of autoclaving (120 °C/30 min)
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debranching (2% pullulanase/50 °C) time (1 or 11 or 21 h) and retrogradation temperature (4 or 32 or 60 °C/24 h) on sweet potato starch fractions were studied. Further, the functional, pasting, thermal and structural properties of gelatinized, enzyme-hydrolyzed and retrograded (GEHRS) were also investigated. All the treated starches exhibited a dextrose equivalent value ranging between 3.70 and 5.30%. Debranching of starch at 50 °C for 21 h and retrogradation at 4 °C yielded 63% of RS. Results showed that most of the functional properties had been enhanced in GEHRS. GEHRS registered a lower pasting profile, higher gelatinization temperatures and displayed the B + V diffraction pattern with an increased crystallinity. The SEM of debranched starches showed rough plate-like surfaces with irregularly shaped structures. The study concludes that pullulanase debranching of sweet potato starch at 50 °C for 21 h and subsequent retrogradation at 4 °C produce a higher amount of resistant starch in sweet potato starch. |
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ISSN: | 2193-4126 2193-4134 |
DOI: | 10.1007/s11694-016-9450-9 |