USE OF PRESSURE HOMOGENIZATION TECHNIQUE FOR PREPARATION OF MATERIALSWITH CELLULAR STRUCTURE FROM APPLE .2. PRESSURE HOMOGENIZATION ON AQUEOUS-ETHANOLIC CONDITIONS

Materials with cellular structure advantageously can be prepared from apple parenchyma using the pressure homogenisation technique on aqueou s-ethanolic conditions. Compared to pure aqueous conditions homogenisa tion in aqueous-ethanolic environment gives higher yield of disintegra ted material having an improved water-binding capacity while the neces sary amounts of solvents are decreased. A procedure of 3 homogenisatio n steps at 60 bar in a mixture of water and ethanol leads to a materia l with cellular structure, 60% of which consist of particles with a si ze of 80 to 250 mu m and a sufficient quality of colour (L-values in a range from 86 to 91). Such a homogenisation procedure doesn't result in a significant loss of water-binding capacity of the produced materi als compared to preparations without homogenisation steps.