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Effects of rice type (unhulledy, brown, and polished rice), varieties, moisture content, and shape (length and diameter), on rice of puffability by hot air were investigated. The puffability of unhulled rice was the highest among them. In addition, relative crystallinities of puffed paddy by hot air puffer (55±5 sec, at 210±℃) were lower than those of brown and polished rice. The puffability of Wongbongolchalbyeo, glutinous rice, and Jinjubyeo, non-glutinous rice, was good, respectively. Optimum moisture content of unhulled rice for maximum puffed volume was in the range of 10∼12% (w/w).
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