In the case of the newly developed dry milling method, ricegrains are milled easily because of the reduced hardness of thegrains. Rice grains had many cracks and could become fragile during soaking and drying, because the water diffusion rate of rice grains was different compared to the dehydration rates of rice grains (Genkawa, Tanaka, Hamanaka, & Uchino, 2011). The general compositions of the Hopyung (HP) riceflour with different particle size distributions are summarized inTable 1. Four different rice flours, HP-80, HP-120, HP-160, and HP-200 were prepared from milling and the particle sizes of riceflours were<180,<125,<95, and<75mm, respectively. The moisture contents of riceflour were 14.07e15.36 g/100 g. The protein content was decreased significantly with decreasing particle sizes (p<0.05), but crude lipid and ash contents were not significantly different with particle sizes. Although whole rice grains were milled and passed through a given sieve, HP-200 riceflour (<75mm) had lower protein content.
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