2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/130309It is shown here that concurrence between advection and diffusion in a drying sessile drop of a biological fluid can produce spatial redistribution of albumen and salt. The result gives an explanation for the patterns observed in the dried drops of the biological fluids.6 pages, 3 figures; submitted to European Physical Journal ESoft Condensed Mattertext