**Author details**

 Raluca Daniela Isopescu<sup>1</sup> , Ana Maria Josceanu<sup>1</sup> \*, Teodora Colta and Roxana Spulber²

\*Address all correspondence to: a\_josceanu@chim.upb.ro

1 University POLITEHNICA of Bucharest, Bucharest, Romania

2 Beekeeping Research and Development Institute, Bucharest, Romania
