2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/213504Many authors have used one-component plasma simulations in discussing the role of ion-ion correlations in reducing neutrino opacities during the collapse phase of a supernova. In a multicomponent plasma in which constituent ions have even a small range of N/Z ratios neutrino opacities are much larger, in some regions of parameters, than for the case of a one component plasma.5 pages. Final version. To be published in Phys. Lett. BAstrophysicstext