Fig. 2
Mass fractions of light isotopes versus mass for a 12 M⊙ star with υini/υcrit = 0.4 at the start of hydrogen burning a) when central hydrogen mass fraction is 0.48 b) and 5 × 10-3c). In this model the mixing is strong enough to deplete boron almost completely at the end of the MS, lithium and beryllium are depleted at much earlier times.
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