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  • Title: Morphology, crystallinity, pasting, thermal and quality characteristics of starches from adzuki bean (Vigna angularis L.) and edible kudzu (Pueraria thomsonii Benth).
    Author: Reddy CK, Luan F, Xu B.
    Journal: Int J Biol Macromol; 2017 Dec; 105(Pt 1):354-362. PubMed ID: 28705501.
    Abstract:
    Starches were isolated from adzuki bean (Vigna angularis L.) and edible kudzu (Pueraria thomsonii Benth) and investigated for their physico-chemical, morphological, pasting, crystallinity, thermal and FT-IR spectroscopic characteristics. Statistical analysis of physico-chemical and functional characteristics showed significant (p<0.05) difference between isolated starches from adzuki bean and edible kudzu. The XRD pattern of starches from adzuki bean and edible kudzu showed A-type with reflections (2θ) at 15.0°, 17.03°, 17.89°, 23.18°and 15.12°, 17.03°, 17.77°, 23.3°, respectively. The starch granules from adzuki bean were smooth, round, oval to kidney or irregular while those of edible kudzu starch were spherical, hemispherical and polygonal. Edible kudzu starch exhibited high pasting temperature, gelatinization temperatures, enthalpy and less pasting parameters as compared to starch from adzuki bean. Peaks in FT-IR spectra of both starches shown its carbohydrate nature. Starch from adzuki bean showed high swelling power and solubility as compared to edible kudzu, and enhanced the swelling power and solubility of isolated starches with the temperature raised from 50°C and 90°C. Finally, this work offers data for the application of starches isolated from adzuki bean and edible kudzu that would be applicable for both food and non-food industries.
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