The EDS preparation follows the typical technique of Homeopathic
Medicine proposed by Hahnemann [29], that essentially implies the
iteration of two steps: dilution (centesimal or decimal) and “dynamization”.
The process of “dynamization” consists of violent agitations
(succussions) of the solution, by means of a mechanical apparatus. For a
centesimal dilution, the starting point is a 1% in mass solution: as an
example, to prepare a centesimal dilution of Sodium Chloride (NaCl),1 g
of NaCl, is added to 99 g of solvent (dilution step). The solution is then
subject to the process of “dynamization” (succussion step), consisting in
a violent shaking by means of a mechanical apparatus (DYNA HV 1 by
Debofar N.V.S.A. Belgium). The final solution is called “1 centesimal
hahnemannian” or 1 CH for short. So in the preceding example, NaCl 1
CH was obtained. In order to prepare the 2 centesimal hahnemannian
(NaCl 2 CH), 1 g of the 1 CH solution is added to 99 g of solvent, and the
resulting solution is “dynamized”. The dilution and succussion steps are
iterated until the desired degree of dilution is met