1. Department of Glass and Ceramics
2. Faculty of Chemical Technology
3. Institute of Chemical Technology Prague
4. 166 28 Prague 6, Czech Republic
5. Department of Materials Science and Engineering
6. Institute of Biomaterials
7. University of Erlangen-Nuremberg
8. 91058 Erlangen, Germany
9. Institute of Inorganic Chemistry of the ASCR, v.v.i.
10. , Czech Republic
11. Department of Biochemistry and Microbiology
12. Faculty of Food and Biochemical Technology
13. 166 28 Prague, Czech Republic