Biomedical Engineering Reference
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compatibility of biopolymers decreases. If R>1, it leads to increase in compatibility. At R
values less or equal 0.3, the presence of the particles do not effect noticeably neither position
of the binodal line, neither the main parameters of the phase diagram. We established that
decrease compatibility of the biopolymers in the presence of 3 um particles become more
significant among the next order:CML latex < aliphatic amino latex< sulfate latex
CML/sulfonate latex.
Since addition of particles in the separated W-SC-SA system leads to their incorporation
into the SC enriched phase, the dynamic modules and the viscosity of the casein-DSS systems
were measured without the presence and with the presence of 0.91 um, 3 um and 5 um
particles Figures 6 shows the dynamic modules in dependence on the frequency for the water
-SC (10 wt%)-DSS (1.4 wt%) system before and after addition of the particles (Figure 6 a)
and the flow curves of these systems (Figure 6 b).The presence of small micro particles in the
system (0.21 um and 0.91 um) do not effect appreciably on the dynamic modules and
viscosity, whereas the particles having diameter 3 um increase appreciably the modules and
viscosity of the system. On the contrary, the larger particles (5 um) decrease the dynamic
modules and viscosity of the SC-DSS system. Such behaviour is an agreement with the data
of the structural study SC-DSS systems after addition of the particles. (Figure 2).
Incorporation of the 3 um particles into the SC-DSS network holes probably make this
network more solid increasing the modules (Figure 6 a) and viscosity (Figure 6 b) of the
system. At frequency values equal to 0.13 rad/s, G' and G'' values are more than 1.4 and 1.6
times, respectively, higher compared with those of the emulsion without particles. The
particles with the size larger than the size of the network holes disrupt partially network
decreasing the modules and viscosity of the system.
Figure 6. The dynamic modules in dependence on the frequency of the aqueous sodium caseinate (10.0
wt%)-DSS systems at q=0.14, obtained in the absence and in the presence of 0.5 % particles at. 296 K. (
a ) , and the flow viscosity of the same systems (b). 296 K.
It is interesting to note that crossing G' and G” in the case of the system containing 3 um
particles takes places at lower frequency than for the system without particles, and crossing
G' and G” for the system containing 5 um particles observe at higher frequency values
compared with that of the system do not containing particles. It means that the time life of the
network is longer in the case of the demixed system containing 3 um particles. For the
rheological investigations of the phase separated SC-SA system containing particles, we
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