1. Institute of Applied Physics, Academiei 5, MD-2028 Chisinau, R. Moldova
2. Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, 3012-Bern, Switzerland
3. Practical Scientific Institute of Horticulture and Food Technology, Vierul 59, MD-2070 Chisinau, R. Moldova