Figure 4.
Stress-strain curves obtained from tensile tests on (a) fermented yeast sample (green curve) and (b) yeast/CNT composites prepared before fermentation (blue curve) and after fermentation (red curve), respectively. Note that for the fermented system two different cell type in terms of dimension and mechanical properties were adopted in order to take into account the mother-daughter cells systems. The comparisons with the result of FEM simulation of traction of a two-cell system are also reported.