[1] Tech Univ Cluj Napoca, North Univ Ctr Baia Mare, Dept Biol & Chem, Baia Mare 430122, Romania
[2] Res Inst Analyt Instrumentat, INCDO INOE 2000, Cluj Napoca 400293, Romania
[3] Natl Inst Mat Phys, Magurele 077125, Romania
[4] Natl Inst Res & Dev Isotop & Mol Technol, Cluj Napoca 400293, Romania
[5] Univ Babes Bolyai, Fac Biol & Geol, Cluj Napoca 400015, Romania