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Молочнохозяйственный вестник, №3 (19), III кв. 2015
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properties of the product have been studied with the help of the rotational viscometer
“RHEOTEST-2”. The received data have made it possible to graph the shear rate (y, s
-1
)
dependences of the shear stress (Ţ, Pa) and effective viscosity (η
ef
, Pa*s). The analysis
of these dependences shows their submission of the power law with the exponent m
< 1, which corresponds to the current of the pseudo-plastic liquid. When increasing
skimmed milk powder replacement percentage by dry demineralized whey, the
consistency coefficient increases and the exponent m (index of the fluid flow) decreases,
which indicates an increase in viscosity and decrease in fluidity. The research shows the
structure destruction rate increase in all samples of the concentrated dairy products
when replacing skimmed milk powder by dry demineralized whey more than 20 %.
During storage, the structure compression and the deviation from the «Newtonian»
liquid properties are observed in all samples under stud
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