The content of pigments and proteins in P. stratiotes is determined. Seventeen amino acids and twelve acylcarnitines are identified and quantified under the action of copper and zinc in ionic form and in the form of colloidal nanoparticles obtained by metal granules dispersing induced by electric current pulses in water. The significant changes in the content of total protein, individual amino acids and acylcarnitines indicate inappropriate protein and lipid metabolism. The differences in action of  metal ions and nanoparticles were also detected.

Keywords: Pistia stratiotes, copper, zinc, nanoparticles, pigments, amino acids, acylcarnitines

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