In tests on FSC and BAT collagen differences were observed in values of electrical conductivity. FSC had higher electrical conductivity than BAT collagen in both heating runs. For BAT collagen, along with the temperature rise, σ increased to 10−10 S/m in the first heating run and to 10−8 S/m in the second heating run. For FSC, σ increased to 10−5 S/m and 10−4 S/m, in the first and second heating run respectively. These results indicate that FSC behaves like a semiconductormin the temperature range 395–510 K (Fig. 4).