A gradient of 114299 particles obtains by means of a tridimensional diffusion process [Un gradient de 114299 particules obtenu par un processus de diffusion tridimensionnelle].
d=0.73
d=0.80
d=0.87
d=0.93
d=0.42
d=0.50
d=0.58
d=0.65
d=0.16
d=0.22
d=0.28
d=0.35
d=0.01
d=0.03
d=0.07
d=0.11
d>0.12
d>0.25
d>0.37
d>0.50
d>0.62
d>0.75
d>0.87