Effect of granule size on the properties of lotus rhizome C-type starch. (10th December 2015)

• Record Type: Journal Article
• Authors: Lin, Lingshang; Huang, Jun; Zhao, Lingxiao; Wang, Juan; Wang, Zhifeng; Wei, Cunxu
• Is Part Of: Carbohydrate polymers. Volume 134(2015)
• Page Start: 448
• Page End: 457
• Publication Date: 2015-12-10
• Subjects: AAG Aspergillus niger amyloglucosidase -- ATR-FTIR attenuated total reflectance-Fourier transform infrared -- DSC differential scanning calorimeter -- PPA porcine pancreatic α-amylase -- RDS rapidly digestible starch -- RS resistant starch -- SAXS small-angle X-ray scattering -- SDS slowly digestible starch -- XRD X-ray powder diffraction; Lotus rhizome starch -- C-type crystallinity -- Different size fractions -- Structural properties -- Functional properties; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2015.08.026
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: Lotus rhizome C-type starch was separated into five different size fractions. Different size fractions had different shapes but the same crystallinity. The granule size was positively correlated with the short-range ordered degree. Gelatinization T p, T c and Δ T were negatively correlated with granule size. Hydrolysis degree and digestion were negatively correlated with granule size. Abstract: Lotus rhizome C-type starch was separated into different size fractions. Starch morphologies changed from irregular to elongated, ellipsoid, oval, and spherical with decreasing granule size. The small- and very-small-sized fractions had a centric hilum, and the other size fractions had an eccentric hilum. The different size fractions all showed C-type crystallinity, pseudoplasticity and shear-thinning rheological properties. The range of amylose content was 25.6 to 26.6%, that of relative crystallinity was 23.9 to 25.8%, that of swelling power was 29.0 to 31.4 g/g, and that of gelatinization enthalpy was 12.4 to 14.2 J/g. The very-small-sized fraction had a significantly lower short-range ordered degree and flow behavior index and higher scattering peak intensity, water solubility, gelatinization peak temperature, gelatinization conclusion temperature, consistency coefficient, hydrolysis degrees, and digestion rate than the large-sized fraction. Granule size significantly positively influenced short-range ordered structure and swelling power and negatively influenced scattering peak intensity, water solubility, hydrolysis and digestion of starch ( p < 0.01).