Chemical and thermodynamical aspects

The same author proposed a theoretical approach to the caloric values of carbohydrates calculated from the number N of valency electrons in a certain compound [25]. When C, H and O describe the numbers of carbon, hydrogen and oxygen, resp., in a molecule, N can be derived from the formula 

When the elemental composition of cells is known as weight fractions of carbon (C), hydrogen (H) and oxygen (O) a modified form 

Based on a stoichiometric equation for the combustion of biomass and the oxygen consumption during combustion, Ho and Payne arrived at a very simple equation for the combustion enthalpy only depending on the mass fraction of carbon fcT calculated for biomass without ash and water [30]  

This equation has been applied to the energy content of prototrophic bacteria with astonishing good results. 

Elemental composition and combustion enthalpies of carbohydrates, hpids and proteins [31], 

---

This chapter deals about the internal structure of the cl minerals, which determines their response to the physical and chemical changes. The chemical and thermodynamic aspects which control the formation process will be discussed in the next chapter, and the physical properties are presented in Chapter 5. 

---