The influence of whey protein concentrates on characteristics of set-style yoghurt made from goat milk during storage

Abstract

The possibility of whey protein concentrates application in the production of goat milk's set yoghurt was investigated. Three series of samples were produced: A - set- style goat's yoghurt; B - set-style yoghurt from goat's milk supplemented with 0.5% WPC; C - set-style yoghurt from goat's milk supplemented with 1% WPC. Physicochemical properties and viscosity of produced samples were investigated on the 1st, 7th, 14th and 21st day of storage. Due to data analysis it was concluded that the highest viscosity on 1st, 7th and 14th day of storage had set-style goat's yoghurt samples (A), while on 21st day of storage highest viscosity was recorded in samples of set-style yoghurt from goat's milk supplemented with 1% WPC

U radu je ispitivana mogućnost primene koncentrata proteina surutke u proizvodnji čvrstog jogurta od kozjeg mleka. Proizvedene su tri serije uzoraka: A - čvrsti jogurt od kozjeg mleka; B - čvrsti jogurt od kozjeg mleka sa dodatkom 0,5% KPS i C - čvrsti jogurt od kozjeg mleka sa dodatkom 1% KPS. Ispitivanje fizičko-hemijskih karakteristika i viskoziteta proizvedenih uzoraka jogurta vršeno je 1, 7, 14 i 21-og dana skladištenja. Na osnovu dobijenih rezultata utvrđeno je da su najveće vrednosti viskoziteta 1, 7 i 14-og dana skladištenja imali uzorci čvrstog jogurta (A) dok je 21. dana skladištenja najviši viskozitet zabeležen kod uzoraka čvrstog jogurta proizvedenog od kozjeg mleka sa dodatkom 1% KPS. Najveću sposobnost vezivanja vode tokom celokupnog perioda skladištenja imali su uzorci C, dok je najmanja sklonost ka sinerezisu zabeležena kod uzoraka B.