Comparison of the mean opacities of a stellar model computed with the new Ni data and one with the OP data. Upper panel: Rosseland mean (κ_R) of the stellar mixture with the new Ni data (solid line) and that with OP (dashed line) vs. log T. Lower panel: ratio of the SCO-RCG (κ_R, SR) and OP (κ_R, OP) Rosseland means vs. log T for the stellar mixture (thick line) and for Ni alone (thin line). The dotted line represents a ratio of one.