| 摘要 |
PURPOSE:To improve the rate of proliferation of bifidus bacteria and to obtain a fermented product having sweet aroma by fractionating a decomposition liquid of rice bran malt to form a bifidus bacteria proliferation promoting agent containing a low molecular peptide fraction, mixing a milk raw material with the promoting agent and fermenting the obtained milk raw material with bifidus bacteria. CONSTITUTION:Rice bran malt produced by culturing a mold in defatted rice bran, etc., is subjected to autodigestion to obtain an enzyme decomposition liquid (A). Ethanol having a concentration of 99.5% is added to the component A and the precipitate is further added with 90wt.% of ethanol and subjected to reprecipitation treatment to obtain a protein fraction (B). If necessary, the component A is filtered with an ultrafiltration membrane having a fractional molecular weight of 3,000-5,000 to obtain a low molecular peptide fraction (C). A bifidus bacteria proliferation-promoting agent containing the component B or C is added to fresh milk or reconstituted defatted milk in an amount of 0.05-0.5wt.% and a bifidus bacteria strain such as Bifidobacterium longum is inoculated to the milk and cultured at 30-40 deg.C for 18-30hrs under anaerobic condition to effect the fermentation of the milk. After the fermentation, the product is optionally added with sugar, fruit juice, etc., to obtain the objective fermented milk. |
