为考察半干法磨粉对大米粉粉质特性的影响，本研究选用了不同仪器对调质大米进行半干法磨粉，分析和比较大米粉破损淀粉、粒径分布、微观结构、水合特性、DSC热特性、流变特性等粉质特性，以筛选出粉质特性接近湿磨粉的调质粉。研究结果显示：使用旋风磨和布勒磨进行半干法磨粉对粉质特性影响较显著，随着润米水分的增高，破损淀粉含量降低至5%以下，粒径减小，其中旋风30%的平均粒径达到54.83 μm，粒径范围为12.96~104.70 μm，淀粉颗粒形态完整，更接近湿磨粉，同时调质粉溶水率降低，DSC热特性中的糊化温度To、Tp降低，糊化范围Tr和糊化焓ΔH增大，流变特性中表征弹性特征的G′和表征黏性特征的G″的变化趋势也更接近于湿磨粉品质。结合磨粉过程中的可操作性，选择旋风磨，30%调质米进行半干法磨粉适用于米粉原料的生产。

To investigate the influence of semi-dry milling on the quality of rice flour, different types of grinders were used in this study to prepare quenched rice. The damaged starch, particle size distribution, microstructure, hydration characteristics, differential scan`ning calorimetry (DSC) thermal properties, and rheological properties of milled flours were analyzed, so as to select the appropriate quenched flour with similar characteristics to those of wet milled flour. The results showed that semi-dried milling using cyclone and Buler mills had a significant effect on the quality of rice flour. With increasing tempering moisture content, semi-dry milling led to significant decreases in the damaged starch content, as it was reduced to less than 5%. The particle size also decreased with a cyclone mill; 30% of the rice flour had an average particle size of 54.83 μm, ranging from 12.96 μm to 104.70 μm. Starch particles had an intact structure, which was closer to that obtained with wet milling. At the same time, the water solubility of the quenched rice flours also decreased. In regard to the DSC thermal properties, the pasting temperatures To and Tp decreased, while the pasting range, Tr, and gelatinization enthalpy, ΔH, increased. In regard to the rheological properties, elastic properties represented by G ' and viscosity properties represented by G " exhibited similar changes and were also closer to those obtained with wet milling. Considering the milling process operability, cyclone milling with 30% quenched rice was applicable in the production of rice flour used to make rice noodles.

公益性行业（农业）科研专项经费资助（201303070）;中央级公益性科研院所基本科研业务费专项资金（中国农业科学院作物科学研究所）资助项目