Coupling between amino acid and water dynamics by broadband dielectric spectroscopy

SÁIZ LUCIANA; CERVENY SILVINA

Ischia

Conferencia; 7th International Conference Times of Polymers and Composites; 2014

University of Naples Federico II-The Second University of Naples

The dynamics of proline aqueous solution was investigated for water concentrations from 40 to 60 wt% by dielectric spectroscopy (105-109Hz) in the temperature range from 230 to 300 K, where the solutions remain amorphous. We found two relaxation processes, related with the reorientation of proline and water as previously observed in a higher frequency range at room temperature. We found that both dynamics are strongly coupled, as previously observed in hydrated proteins powders, in spite of the fact that a single amino acid is a molecule much simpler than a protein.