Journal
STARCH-STARKE
Volume 72, Issue 11-12, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/star.201900293
Keywords
Arenga pinnata starch; granular size; molecular structure; nuclear magnetic resonance; X-ray diffraction
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Funding
- Natural Science Foundation of Guangxi Province [2016GXNSFBA380231, 2019GXNSFAA185014]
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Arenga pinnata starch (APS) is separated into large and small size fractions. The large granules (APS-L) show a more elongated oval shape, while the small granules (APS-S) are roughly close to a round shape. The large and small granules exhibit a Maltese cross at one end of the APS granules. Both large and small fractions show C-type crystallinity, but the APS-L display a higher crystallinity and more ordered molecular structure. In addition, APS-L have higher helices content than that of APS-S. The APS-L have higher peak viscosity, trough, and final viscosity values, breakdown value, gelatinization enthalpy, and gelatinization temperatures than that of the APS-S, but the APS-L fraction displays a lower setback value. The APS-S gel is more elastic and more solid than APS-L gel. The results indicate that granule size is significantly related to pasting, rheological, and thermal properties of the APS.
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