Pulsed differential scanning calorimeter measurement of collagene fiber heat capacity

The work gives the estimation of the heat capacity jump at melting in water of collagen fibers of rat tail tendons. The measurements were carried out by an original calorimetric system designed by the authors, which in contrast to modern differential scanning calorimeters making the measurements under not equilibrium conditions due to the continuous heating of samples during the scanning, allows make the measurements both in scanning regime and also in pulsed regime under equilibrium conditions . The measurements carried out far from the phase transition in the pulsed regime allowed to determine exactly under equilibrium conditions the heat capacity before and after transition. As a result, the exact value of heat capacity jump under the equilibrium conditions was determined at melting.