Emphasizing the Toxicity of Heavy Metal Ions on Plants: Monitoring with an Amino Acids Assay - PINTILIE, Olga; ZAHARIA, Marius; TUDORACHI, Lucia; BĂNCILĂ, Sabina; DROCHIOIU, Gabi; SANDU, Ion (The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, 2014)