PROBLEM TO BE SOLVED: To provide rice grain powder excellent in safety, processing suitability, bioactivity, etc., to provide a method for controlling a particle diameter and a particle diameter distribution of the rice grain powder, and to provide a method for controlling viscosity of the rice grain powder.SOLUTION: This method for processing rice grains includes subjecting rice grains having ≥20 wt.% amylose content in starch to a wet heating step by steam under 0.05-0.5 MPa pressure condition for 1-60 min, and performing a crushing step. The method for controlling a particle diameter and a particle diameter distribution of the rice grain powder, the method for controlling a gelatinization degree and viscosity of the rice grain powder, and the rice grain powder and a processed product obtained by the methods are each provided.COPYRIGHT: (C)2012,JPO&INPIT【課題】安全性、加工適性、生理活性等が優れた米穀粉を提供し、そして、米穀粉の粒径および粒径分布の制御方法、ならびに米穀粉の粘度制御方法を提供する。【解決手段】澱粉中のアミロース含量が20重量%以上の米穀粒を、0.05~0.5MPaの圧力条件下、1~60分間、水蒸気による湿熱処理に付した後、粉砕処理を行うことを特徴とする米穀粒の加工方法、米穀粉の粒径及び粒径分布の制御方法、米穀粉の糊化度及び粘度の制御方法、並びにこれから得られた米穀粉及び加工品。【選択図】なし
