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Hydration-dependent dynamic crossover phenomenon in protein hydration water.
- Source :
-
Physical review. E, Statistical, nonlinear, and soft matter physics [Phys Rev E Stat Nonlin Soft Matter Phys] 2014 Oct; Vol. 90 (4), pp. 042705. Date of Electronic Publication: 2014 Oct 08. - Publication Year :
- 2014
-
Abstract
- The characteristic relaxation time τ of protein hydration water exhibits a strong hydration level h dependence. The dynamic crossover is observed when h is higher than the monolayer hydration level hc=0.2-0.25 and becomes more visible as h increases. When h is lower than hc, τ only exhibits Arrhenius behavior in the measured temperature range. The activation energy of the Arrhenius behavior is insensitive to h, indicating a local-like motion. Moreover, the h dependence of the crossover temperature shows that the protein dynamic transition is not directly or solely induced by the dynamic crossover in the hydration water.
Details
- Language :
- English
- ISSN :
- 1550-2376
- Volume :
- 90
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Physical review. E, Statistical, nonlinear, and soft matter physics
- Publication Type :
- Academic Journal
- Accession number :
- 25375521
- Full Text :
- https://doi.org/10.1103/PhysRevE.90.042705