Figure 5

Low temperature thermal inactivity check. Thermal signal of a concentrated sample (T600 = 48%) submitted to the following thermal regime: (i) sample cell introduction at room temperature; (ii) cooling with 1 K/min to 4°C; (iii) 20 hours of isothermal maintaining at 4°C; (iv) ramp heating with 1 K/min to 37°C; (v) 20 hours of isothermal maintaining at 37°C. One can notice the thermal inactivity at 4°C followed by the "wake-up" of the bacterial population on heating. Perturbations caused by thermal switches are clearly overlapping with the intrinsic thermal signal of the bacterial population.