Search Results

You are looking at 1 - 5 of 5 items for

  • Author or Editor: P. Tissot x
  • Refine by Access: All Content x
Clear All Modify Search

Abstract  

The calorimetric cells of a Setaram BT 2.15 flux calorimeter have been modified, in order to measure the heat production associated with microbial growth, with a continuous flow of gas and liquid through the sample. Good conditions for the growth of the microorganisms present in a polluted soil were determined and the possibility of the bioremediation examined. It was shown that the biodegradation of hydrocarbons adsorbed for a long time in the soil is a very slow process difficult to study with calorimetry. On the contrary, sodium succinate and different C14 hydrocarbons were easily biodegradated, producing a large quantity of heat.

Restricted access

Properties of molten alkali metal trifluoracetates

Part II. Thermal properties and kinetics of thermal decomposition

Journal of Thermal Analysis and Calorimetry
Authors: R. Dallenbach and P. Tissot
Restricted access

Properties of molten alkali metal trifluoroacetates

Part I. Study of the binary system CF3COOK-CF3COONa

Journal of Thermal Analysis and Calorimetry
Authors: R. Dallenbach and P. Tissot
Restricted access

The influence of the temperature program parameters of an ODSC experiment on the calculated “reversing” and “kinetic” signals has been studied. Mixed orthophosphate salts of KMPO4 (where M=Ni2+, Co2+ and Fe2+) which present at least one structural phase transition have been used for this purpose. On these crystalline compounds we have shown that the non reversing heat flow is partly associated with the formation and disappearance of ferroelastic and ferroelectric domain walls. However a proper choice of the temperature program parameters is important so that the calculated “reversing” and “kinetic” curves have the supposed physical meaning according to the assumptions made for the calculations.

Restricted access

Abstract  

We have studied the solid-liquid equilibrium of the system Sr1–yBayFCl1–xBrx using DTA and X-ray diffraction techniques. The entire composition range in this system yields solid solutions which crystallize in the PbFCl (Matlockite) structure type. The melting points of the entire composition range have been parametrized (within 5°C rms error) using a biquadratic fit of the available data obtained by experiment and from the literature.

Restricted access