The panels A, B, C, and D in Fig. 2 show the acidification profile
of L. casei in WPI-P-GA microcapsules and WPI-P-O-GA comicrocapsules.
These microcapsules were stored at 5 °C and
25 °C for a period of 0, 30, 60 and 90 days before these fermentation
tests were carried out.The fermentation was carried out
for 72 h at 37 °C. The change in the pH over the fermentation
time due to the production of lactic acid was measured as an
indicator of fermentation activity