[1] Czech Acad Sci, Inst Plasma Phys, Slovankou 1782-3, Prague 8, Czech Republic
[2] Univ Chem & Technol Prague, Dept Power Engn, Tech 5, Prague 6, Czech Republic
[3] Univ Ghent, Dept Green Chem & Technol, B-9000 Ghent, Belgium
[4] HVM Plasma spol sro, Hutmance 347-2, Prague 5, Czech Republic
[5] Inst Phys Czech Acad Sci, Cukrovarnicka 112-10, Prague 6, Czech Republic
[6] Czech Acad Sci, Inst Chem Proc Fundamentals, Rozvojova 135, Prague 6, Czech Republic