米ヌカ油利用の研究 (第5報)

海外産米ヌカの製油原料としての品質 (その2)

抄録

Rice bran which was directly sampled by an author from rice mills in Southeastern Asia, rice bran sent from several area as sample by importer, and domestic rice bran were compared as the raw material of oil about the qualities of bran and extracted oil to see the differences by the place of production and by the extracting conditions. As a result, the difference in oil content of rice bran produced in different place was due to the polishing method. Generally, the rice bran from Southeastern Asia contained 3% less moisture and 5% less oil than the domestic rice bran. Sap. value was a little higher, and iodine value was a little lower. The color was lighter than the domestic rice bran oil. U.S.M. % and mp showed minor difference. The minor components which have U.V. extinction maxima in the crude oil were not larger in difference by the place of production than by the conditions of extractions (the kind and the temperature of the solvents).
U.S.M. was also equal in the quality of eliminating the absorption by conc. alcoholic pottash saponification. The boiled-rice bran had much oil content and low acid value, being suitable as the raw material for oil production.
The grain size of bran is 420250 μ in diameter, being 1/2 of domestic rice bran.