Observed and predicted abundances on Sirius A as a function of Z, the atomic number, left in the model with turbulence calculated with an original metallicity of 0.009 for three slightly different values of turbulence and right in the model with mass loss with an original metallicity of 0.010 calculated with four different mass loss rates. The model name Z0.009_dY-0.02_mtb1.0 stands for a model calculated with Z₀ = 0.009, ΔY =  −0.02, and ΔM₀ = 1.0  ×  10^-6   M_⊙. The model name MassLoss_Z0.010W2E-13 stands for a model calculated with dM/dt =  −2  ×  10^-13   M_⊙/yr. All dotted lines represent models of about 200 Myr.