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Scientific interests:

• Phytoextraction of metals from soils and waters. Phytomining of rhenium. Recovery of waste products from mining and ore processing industry;
• Spectrophotometric and Atomic absorption spectrometry analysis of environmental and industrial samples.

Selected papers:

1. O. Bozhkov, Chr. Tzvetkova, L. Borisova, B. Briskin,
   „Phytomining: New Method for Rhenium Production“,
   Advanced Materials & Processes 170 (5), 2012, 34-37;
   
2. L.V. Borisova,V, A. Ryabukhin, O. D. Bozhkov and Kh. Ts. Tsvetkova,
   “FieldDetermination of Rhenium in Plants Using Catalytic Test Methods with Dimethyldithiooxamide and Sulfonitrazo P“,
   Journal of Analytical Chemistry, 65 (5), 2010, 535-541;
   
3. Stoyko Gyurov, Nikolay Marinkov, Yoanna Kostova, Diana Rabadjieva, Daniela Kovacheva, Christina Tzvetkova, Galia Gentscheva, Ivan Penkov,
   “Technological scheme for copper slag processing”,
   International Journal of Mineral Processing, 158 (2017), pp. 1–7.