1. Department
of Biochemistry and Molecular Biology, University of Bucharest, 91-95 Spl.
Independentei, 050095 Bucharest, Romania
2. Faculty
of Materials Science and Engineering, Politehnica University of Bucharest, 313 Spl. Independenţei, 060042 Bucharest, Romania
3. School
of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99164, United States