Abstract: The purpose of this study is to evaluate the correlations among the size,the morphology,the associated protein content of wheat starch granule and the thermal properties of 8 different wheat starches.The relationships between the micro-structural morphology and thermal properties of wheat starch granule were qualitatively analyzed DSC(differential scanning calorimeter) and SEM(scanning electron microscope)were used.SPSS13.0 was applied to analyze the data.The results showed that the negative correlations between DA(diameter of starch granule type A) and DB(diameter of starch granule type B),also those between DB and thermal properties(onset temperature(To),peak temperature(Tp),enthalpy(ΔH) and range of gelatinisation(Tc-To)),are revealed.Significant positive correlations between DA and thermal properties,also between Tp and ΔH,are observed;the content of the associated protein is significantly and negatively correlated to the DB,whereas weakly and negatively to the DA.

Key words: starch granule, diameter, gelatinisation, associated protein, correlation