@@ Study of ecology and biogeochemistry is helpful for understanding ecologicaltoxicology of As,Cd,Hg,Pb and Cr.Anthropogenic activities,such as mineexploitations,co
@@ Several glazed ceramic fragments(XVI-XVIII centuries)from two productioncenters in Portugal(Coimbra and Lisbon)were object of study.The ones fromCoimbra with
@@ When a temperature change under a vacuum condition is applied to a pyroelectriccrystal such as lithium tantarate (LiTa03) and lithium niobate (LiNb03),anel