1. Inst. of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen; Wiesenstrasse 14 Giessen 35390 Germany
2. Faculty of Biology and Chemistry; Justus-Liebig-University, Giessen; Germany
3. Dept. of Chemical Engineering; Kansas State University; Manhattan KS USA
4. Fraunhofer Institute for Molecular Biology and Applied Ecology (IME); Project group “Bioresources”, Winchesterstrasse 3; Giessen 35394 Germany