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Structural and functional properties of C-type starches.

Jinwen Cai1, Canhui Cai, Jianmin Man

  • 1Key Laboratories of Crop Genetics and Physiology of the Jiangsu Province and Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou 225009, China.

Carbohydrate Polymers
|December 5, 2013
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Summary

This study compared C-type starches from peas, faba beans, yams, and water chestnuts, revealing significant differences in structure, crystallinity, and functional properties like swelling and viscosity.

Keywords:
(13)C CP/MAS NMRAAGATR-FTIRAspergillus niger amyloglucosidaseC-type starchDSCFaba bean seedGPCPPAPea seedRDSRSRVASDSSEMStructural and functional propertyWater chestnut cormX-ray powder diffractionXRDYam rhizomeattenuated total reflectance-Fourier transform infrareddifferential scanning calorimetrygel permeation chromatographyporcine pancreatic α-amylaserapid visco analyzerrapidly digestible starchresistant starchscanning electron microscopeslowly digestible starchsolid-state (13)C cross-polarization magic-angle spinning nuclear magnetic resonance

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Area of Science:

  • Food Science
  • Plant Biochemistry
  • Materials Science

Background:

  • Starch structure dictates its functional properties.
  • Investigating diverse botanical sources of C-type starch is crucial for understanding structure-function relationships.
  • Variations in starch composition (amylose, amylopectin) influence digestibility and processing behavior.

Purpose of the Study:

  • To characterize and compare the structural and functional properties of C-type starches from pea, faba bean, yam, and water chestnut.
  • To correlate starch structural attributes with functional characteristics such as swelling, viscosity, and digestibility.
  • To identify starches with desirable properties for specific food applications.

Main Methods:

  • Morphological analysis (shape, size, hilum position).
  • Chemical composition analysis (amylose, damaged starch, phosphorus content).
  • Crystallinity determination (X-ray diffraction).
  • Functional property assessment (swelling power, gelatinization, pasting viscosity).
  • Hydrolysis susceptibility testing (acid, enzyme).

Main Results:

  • Starches varied significantly in size, amylose content, and phosphorus levels.
  • Water chestnut starch exhibited superior swelling, viscosity, and lower gelatinization temperatures.
  • Yam starch showed higher gelatinization temperatures and distinct crystallinity.
  • Digestibility varied, with water chestnut and yam starches showing higher rapidly digestible starch (RDS) and resistant starch (RS) content, respectively.

Conclusions:

  • Botanical origin significantly impacts C-type starch structure and functionality.
  • Water chestnut starch offers promising properties for applications requiring high swelling and viscosity.
  • Differences in starch structure, particularly amylopectin chain length and crystallinity, influence hydrolysis rates and digestibility.