Abstract: Provided is a raw material for a food additive which promotes the intracerebral release of monoamines such as dopamine and noradrenaline, and imparts a function to prevent cranial nerve disease and a function to improve brain function to foods, by being added to said foods. This method involves using as a food additive an oligopeptide mixture containing dipeptides or tripeptides having tyrosine or phenylalanine as constituent amino acids, in order to produce foods to prevent cranial nerve disease or foods to improve brain function.

Abstract: Disclosed is a method for obtaining an improved drink, in particular a method for suppressing turbidity and sediment of an acidic drink that contains a peptide when the acidic drink is stored for a long period of time. In a basic method for suppressing turbidity and sediment, pectin and a fatty acid ester emulsifier are added to an acidic drink that contains a peptide. In this connection, it is appropriate that the stabilizers are respectively added in an amount of 1-10% by weight relative to the amount of the peptide. In addition, the pH of the acidic peptide drink is preferably 2.5-5.0; a peptide to be used preferably has a degradation rate of 10% or more and a free amino acid content of 50% or less; and the protein concentration in the drink is preferably 0.1-5.0% by weight.

Abstract: Disclosed is a process for fractionating soybean protein into 7S globulin, 11S globulin or a lipophilic protein at a high purity with good efficiency, which relates to a fractionation technique for soybean protein into proteins having characteristic properties (7S globulin, 11S globulin and a lipophilic protein) and which is a process practicable at a food industrial level. It is found that soybean protein can be fractionated into 7S globulin, 11S globulin or a lipophilic protein at a high purity with good efficiency by extracting soybean milk from processed soybean which has been subjected to a water-insolubilization treatment specific to a desired protein and fractionating the resulting soybean milk or soybean curd refuse into the desired protein.

Abstract: Disclosed is a method for obtaining an improved drink, in particular a method for suppressing turbidity and sediment of an acidic drink that contains a peptide when the acidic drink is stored for a long period of time. In a basic method for suppressing turbidity and sediment, pectin and a fatty acid ester emulsifier are added to an acidic drink that contains a peptide. In this connection, it is appropriate that the stabilizers are respectively added in an amount of 1-10% by weight relative to the amount of the peptide. In addition, the pH of the acidic peptide drink is preferably 2.5-5.0; a peptide to be used preferably has a degradation rate of 10% or more and a free amino acid content of 50% or less; and the protein concentration in the drink is preferably 0.1-5.0% by weight.

Abstract: Disclosed is a process for fractionating soybean protein into 7S globulin, 11S globulin or a lipophilic protein at a high purity with good efficiency, which relates to a fractionation technique for soybean protein into proteins having characteristic properties (7S globulin, 11S globulin and a lipophilic protein) and which is a process practicable at a food industrial level. It is found that soybean protein can be fractionated into 7S globulin, 11S globulin or a lipophilic protein at a high purity with good efficiency by extracting soybean milk from processed soybean which has been subjected to a water-insolubilization treatment specific to a desired protein and fractionating the resulting soybean milk or soybean curd refuse into the desired protein.