1. Institut
für Pharmazie, Friedrich Schiller Universität Jena; Lessingstrasse 8, D-07743 Jena, Germany
2. Department
of Pharmaceutical Technology and Biopharmacy, Albert Ludwigs University Freiburg, D-79104 Freiburg, Germany
3. Science
Department, Roma Tre University; Viale G. Marconi 446, I-00146 Rome, Italy
4. Elektronenmikroskopisches
Zentrum, Friedrich Schiller Universität Jena; Ziegelmühlenweg
1, D-07743 Jena, Germany
5. Department
of Physics, North Dakota State University, Fargo North Dakota 58108-6050, United States