1. The Stephan Angeloff Institute of Microbiology, Department of Applied MicrobiologyBulgarian Academy of Sciences Sofia Bulgaria
2. Department of Botany and Teaching Methods in BiologyUniversity of Plovdiv “Paisii Hilendarski” Plovdiv Bulgaria
3. Department of Analytical Chemistry and Computer ChemistryUniversity of Plovdiv “Paisii Hilendarski” Plovdiv Bulgaria
4. Department of Biochemistry and MicrobiologyUniversity of Plovdiv “Paisii Hilendarski” Plovdiv Bulgaria