TY - GEN
T1 - Dynamics of biopolymers and their hydration water studied by neutron scattering
AU - Chen, S. H.
AU - Chu, X. Q.
AU - Lagi, M.
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].
PY - 2012
Y1 - 2012
N2 - In this paper, both the dynamics of a protein and its hydration water are investigated by quasi-elastic neutron scattering (QENS) experiments. In addition, molecular dynamics (MD) simulations of a realistic hydrated protein powder model are also introduced to reproduce the experimental results. We start from the introduction of the incoherent neutron scattering method for studying dynamics of a protein and its hydration water. Then we discuss in details the coupling of the dynamics of a protein and its hydration water, including the following topics: The elastic scan and the reduction from it the mean squared displacement (MSD) of hydrogen atoms in protein and its hydration water; evidence of the dynamic crossover from pressure dependence of the measured relaxation time of hydration water in biopolymers by QENS; synchronization of the dynamic crossover phenomena in other biopolymers and their hydration water; an alternative method for detecting the dynamic crossover temperature. We also show our observation of a logarithmiclike beta-relaxation in the study of intermediate time protein dynamics at the end of this paper. ©2012 by Società Italiana di Fisica.
AB - In this paper, both the dynamics of a protein and its hydration water are investigated by quasi-elastic neutron scattering (QENS) experiments. In addition, molecular dynamics (MD) simulations of a realistic hydrated protein powder model are also introduced to reproduce the experimental results. We start from the introduction of the incoherent neutron scattering method for studying dynamics of a protein and its hydration water. Then we discuss in details the coupling of the dynamics of a protein and its hydration water, including the following topics: The elastic scan and the reduction from it the mean squared displacement (MSD) of hydrogen atoms in protein and its hydration water; evidence of the dynamic crossover from pressure dependence of the measured relaxation time of hydration water in biopolymers by QENS; synchronization of the dynamic crossover phenomena in other biopolymers and their hydration water; an alternative method for detecting the dynamic crossover temperature. We also show our observation of a logarithmiclike beta-relaxation in the study of intermediate time protein dynamics at the end of this paper. ©2012 by Società Italiana di Fisica.
UR - https://www.scopus.com/pages/publications/84884862799
UR - https://www.scopus.com/pages/publications/84884862799#tab=impact
U2 - 10.3254/978-1-61499-071-0-11
DO - 10.3254/978-1-61499-071-0-11
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 9781614990703
VL - 176
T3 - Proceedings of the International School of Physics "Enrico Fermi"
SP - 11
EP - 41
BT - Proceedings of the International School of Physics "Enrico Fermi": Complex Materials in Physics and Biology
T2 - International School of Physics "Enrico Fermi" on Complex Materials in Physics and Biology
Y2 - 29 June 2010 through 9 July 2010
ER -