2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/27509We develop a detailed analysis of electron transport in normal diffusive con- ductors in the presence of proximity induced superconductivity. A rich structure of temperature and energy dependencies for the system condcutcance, density of states and related quantities was found and explained. If the nor- mal conductor forms a loop its conductance changes h/2e-periodically with the magnetic flux inside the loop. The amplitude of these conductance oscillations shows a reentrant behavior and decays as 1/T at high T2 pages RevTeX, 6 postscript figures, submitted to the proceedings of "Rencontres de Moriond 1996"Condensed MatterSuperconductivitytext