Anharmonic transitions in nearly dry L-cysteine I
| Autor: | Lima, T. A., Sato, E. T., Martins, E. T., Homem-de-Mello, P., Lago, A. F., Coutinho-Neto, M. D., Ferreira, F. F., Giles, C., Pires, M. O. C., Martinho, H. |
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| Rok vydání: | 2011 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/0953-8984/24/19/195104 |
| Popis: | Two special dynamical transitions of universal character have been recently observed in macromolecules at $T_{D}\sim 180 - 220$ K and $T^{*}\sim 100$ K. Despite their relevance, a complete understanding of the nature of these transitions and their consequences for the bio-activity of the macromolecule is still lacking. Our results and analysis concerning the temperature dependence of structural, vibrational and thermodynamical properties of the orthorhombic polymorph of the amino acid L-cysteine (at a hydration level of 3.5%) indicated that the two referred temperatures define the triggering of very simple and specific events that govern all the biochemical interactions of the biomolecule: activation of rigid rotors ($T Comment: 4 pages, 4 figures, submitted to Physical Review Letters |
| Databáze: | arXiv |
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