Foods (May 2020)

Effect of Controlled Hydrothermal Treatments on Mung Bean Starch Structure and Its Relationship with Digestibility

  • Muhammad Awais,
  • Jawad Ashraf,
  • Lili Wang,
  • Liya Liu,
  • Xiaoxue Yang,
  • Li-Tao Tong,
  • Xianrong Zhou,
  • Sumei Zhou

DOI
https://doi.org/10.3390/foods9050664
Journal volume & issue
Vol. 9, no. 5
p. 664

Abstract

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The changes in structure and digestion properties of mung bean starch due to hydrothermal treatment at various controlled temperatures were investigated. Results showed the increase in onset temperature (To) from 66.33 °C to 76.69 °C and decrease in enthalpies (∆Hg and ∆Hr) until the starch was completely gelatinized. The degree of molecular order (DMO) and degree of double helix (DDH) were significantly (p p p > 0.05) change in starch digestibility was observed after 70 °C. Hence, 70 °C can be considered as the critical hydrothermal treatment temperature in mung bean starch. Pearson’s correlation analysis indicated that controlled hydrothermal treatment had negative effect on the DMO, DDH, RC and the granular damage increased vulnerability of mung bean starch to digestion. These findings gave insight into sequential changes in the structure and digestibility occurring during gelatinization process due to hydrothermal treatment. Controlled gelatinization in mung beans at 70 °C is useful and must be employed to produce the foods with lower starch digestibility.

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