According to the results of this study, soy milk with or without
added apple juice could support the growth of L. acidophilus and
L. acidophilus could survive at higher numbers during the storage
period of 21 days at 4 C. The pH values of the fermented soy milk
beverages with or without added apple juice changed little during
the storage period of 21 days at 4 C.
The fermented soy milk beverage with added apple juice samples
was found to be having pseudoplastic shear-thinning nature. It
was obtained that the addition of the apple juice decreased the
consistency coefficient of the fermented beverage. The consistency
of the control group increased up to the value of 71.60 ± 4.73 Pa.sn
(rheological measurements) in the 1st week of the storage at 4 C.
Similarly, the consistency of control samples was found as significantly
higher than apple juice added samples in the sensory tests
by the panelists.
Fermented soymilk beverage with apple juice presented good
sensory acceptance and provided its microbiological stability for at
least 21 days at 4 C with acceptable survival rates of the probiotic
bacteria. Since this fermented soy milk beverage is new and going
to be possible commercial product, the data obtained in this study
could serve valuable information for the design of pumping systems
for the fermented soy milk beverages and development of
novel fermented drinks.