1. Johan Gadolin Process Chemistry Centre Åbo Akademi University Turku/Åbo Finland
2. Laboratory of Industrial Physics University of Turku Turku Finland
3. Laboratory of Electron Microscopy University of Turku Turku Finland
4. Università di Napoli Federico II. Via Cinthia, 4. 80126 Napoli Italy
5. Neste Corporation Porvoo Finland