As a result, DMA analysis was performed
to determine if there was any improvement in
mechanical strength of PCS-grown BC as compared to
control BC. Both types of BC were investigated: PCSgrown
BC from a PCS biofilm reactor, and control from
agitated culture. Figure 8 shows a typical stress-strain
response of the PCS-grown BC (A) and control (B) samples.
The extension of our testers showed a linear-elastic
behavior. PCS-grown BC exhibited a longer elastic deformation
around 1.4%, where a yield point was seen, which
was followed by irreversible deformation. On the other
hand, control BC testers showed only 0.8% elongation.