Foam and method of manufacturing the same

A method of manufacturing a foam comprising:

• preparing an aqueous solution of protein having foamability and foam-stability;
• foaming the aqueous solution of protein having foamability and foam-stability to obtain a foamed aqueous solution;
• adding an aqueous solution of at least one compound selected from the group consisting of alginic acid, salts thereof, and derivatives of alginic acid to the foamed aqueous solution, thereby obtaining a mixture;
• stirring the mixture to obtain a homogeneous solution;
• adding, in a solid state, at least one compound selected from the group consisting of alginic acid, salts thereof, and derivatives of alginic acid to the mixed solution, thereby obtaining a foam precursor;
• and
• drying by heating the foam precursor to denature the protein having foamability and foam-stability, thereby obtaining a foam comprising a matrix and cells dispersed in the matrix, the matrix comprising said at least one compound and the denatured protein.

A method of manufacturing a foam comprising:

• preparing an aqueous solution containing a foaming agent and protein having foam-stability;
• foaming the aqueous solution to obtain a foamed aqueous solution;
• adding an aqueous solution of at least one compound selected from the group consisting of alginic acid, salts thereof, and derivatives of alginic acid to the foamed aqueous solution, thereby obtaining a mixture;
• stirring the mixture to obtain a homogeneous solution;
• adding, in a solid state, at least one compound selected from the group consisting of alginic acid, salts thereof, and derivatives of alginic acid to the mixed solution, thereby obtaining a foam precursor;
• and
• drying by heating the foam precursor to denature the protein having foam-stability, thereby obtaining a foam comprising a matrix and cells dispersed in the matrix, the matrix comprising said at least one compound and denatured protein.