title: Functional properties of wheat starch with different particle size distribution.
abstract: BACKGROUND
  Functional properties of wheat starches with different particle size distribution were investigated.
  
  
  RESULTS
  A-granules displayed a disc shape and B-granules displayed a spherical shape. A-granules had the highest conclusion temperature (Tc , 80.28 °C) and gelatinisation enthalpy (3.268 J g(-1)) and B-granules had the highest peak temperature (Tp, 66.00 °C) and the lowest gelatinisation enthalpy (2.237 J g(-1)). The gelatinisation onset temperature (To), the peak temperature (Tp), Tc and retrogradation of mixed starches increased with the increase of the ratio of B-granules, while the enthalpy, all the viscosity parameters and syneresis of mixed starches decreased with the increase of the ratio of B granules. B-granules had a higher pasting temperature. The sample of B/A = 0.5/10 had the highest peak, breakdown and final viscosity. The percentage of water separated from B-granule gels was minimal, indicated that B-type gels were more stable than other samples. The ΔH2 of A-granules was obviously higher than that of B-granules. However, during storage, the ΔH2 of the starch paste was dramatically increased and the ΔH2 of B-granules was obviously higher than that of A-granules.
  
  
  CONCLUSIONS
  B-granules were easier to age than A-granules and most of the properties of wheat starches varied significantly with the ratio of B-granules. The relationship between structure and functionality of wheat starch received further verification.
authors.affiliation: School of Food Science, Henan Institute of Science and Technology, Xinxiang, 453003, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zeng
authors.forename: Haiyan
authors.initials: H
authors.lastname: Gao
authors.forename: GuangLei
authors.initials: G
authors.lastname: Li
mesh_terms: D002152:Calorimetry, Differential Scanning; D055598:Chemical Phenomena; D004355:Drug Stability; D005615:Freezing; D006358:Hot Temperature; D010316:Particle Size; D012639:Seeds / Q000737:chemistry; D013213:Starch / Q000737:chemistry*; D013816:Thermodynamics; D014908:Triticum / Q000737:chemistry*; D014783:Viscosity
chemical_list: D013213:Starch
keywords: A-granule; B-granule; DSC; RVA; wheat starch