Neutron scattering studies of dynamic crossover phenomena in a coupled system of biopolymer and its hydration water

S. H. Chen; F. Mallamace; Q. Chu; C. Kim; M. Lagi; A. Faraone; E. Fratini; P. Baglioni

doi:10.1088/1742-6596/177/1/012006

Neutron scattering studies of dynamic crossover phenomena in a coupled system of biopolymer and its hydration water

S. H. Chen
, F. Mallamace
, Q. Chu
, C. Kim
, M. Lagi
, A. Faraone
, E. Fratini
, P. Baglioni

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Abstract

We have observed a Fragile-to-Strong Dynamic Crossover (FSC) phenomenon of the α-relaxation time and self-diffusion constant in hydration water of three biopolymers: lysozyme, B-DNA and RNA. The mean squared displacement (MSD) of hydrogen atoms is measured by Elastic Neutron Scattering (ENS) experiments. The α-relaxation time is measured by Quasi-Elastic Neutron Scattering (QENS) experiments and the self-diffusion constant by Nuclear Magnetic Resonance (NMR) experiments. We discuss the active role of the FSC of the hydration water in initiating the dynamic crossover phenomenon (so-called glass transition) in the biopolymer. The latter transition controls the flexibility of the biopolymer and sets the low temperature limit of its biofunctionality. Finally, we show an MD simulation of a realistic hydrated powder model of lysozyme and demonstrate the agreement of the MD simulation with the experimental data on the FSC phenomenon in the plot of logarithm of the α-relaxation time vs. 1/T. © 2009 IOP Publishing Ltd.

Original language	English
Article number	012006
Journal	Journal of Physics: Conference Series
Volume	177
DOIs	https://doi.org/10.1088/1742-6596/177/1/012006
Publication status	Published - 2009
Externally published	Yes

Bibliographical note

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].

Access Output

10.1088/1742-6596/177/1/012006

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@article{3303866bd4b14f3f9474c61b5364982c,

title = "Neutron scattering studies of dynamic crossover phenomena in a coupled system of biopolymer and its hydration water",

abstract = "We have observed a Fragile-to-Strong Dynamic Crossover (FSC) phenomenon of the α-relaxation time and self-diffusion constant in hydration water of three biopolymers: lysozyme, B-DNA and RNA. The mean squared displacement (MSD) of hydrogen atoms is measured by Elastic Neutron Scattering (ENS) experiments. The α-relaxation time is measured by Quasi-Elastic Neutron Scattering (QENS) experiments and the self-diffusion constant by Nuclear Magnetic Resonance (NMR) experiments. We discuss the active role of the FSC of the hydration water in initiating the dynamic crossover phenomenon (so-called glass transition) in the biopolymer. The latter transition controls the flexibility of the biopolymer and sets the low temperature limit of its biofunctionality. Finally, we show an MD simulation of a realistic hydrated powder model of lysozyme and demonstrate the agreement of the MD simulation with the experimental data on the FSC phenomenon in the plot of logarithm of the α-relaxation time vs. 1/T. {\textcopyright} 2009 IOP Publishing Ltd.",

author = "Chen, \{S. H.\} and F. Mallamace and Q. Chu and C. Kim and M. Lagi and A. Faraone and E. Fratini and P. Baglioni",

note = "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]. ",

year = "2009",

doi = "10.1088/1742-6596/177/1/012006",

language = "English",

volume = "177",

journal = "Journal of Physics: Conference Series",

issn = "1742-6588",

publisher = "IOP Publishing",

}

TY - JOUR

T1 - Neutron scattering studies of dynamic crossover phenomena in a coupled system of biopolymer and its hydration water

AU - Chen, S. H.

AU - Mallamace, F.

AU - Chu, Q.

AU - Kim, C.

AU - Lagi, M.

AU - Faraone, A.

AU - Fratini, E.

AU - Baglioni, P.

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 - 2009

Y1 - 2009

N2 - We have observed a Fragile-to-Strong Dynamic Crossover (FSC) phenomenon of the α-relaxation time and self-diffusion constant in hydration water of three biopolymers: lysozyme, B-DNA and RNA. The mean squared displacement (MSD) of hydrogen atoms is measured by Elastic Neutron Scattering (ENS) experiments. The α-relaxation time is measured by Quasi-Elastic Neutron Scattering (QENS) experiments and the self-diffusion constant by Nuclear Magnetic Resonance (NMR) experiments. We discuss the active role of the FSC of the hydration water in initiating the dynamic crossover phenomenon (so-called glass transition) in the biopolymer. The latter transition controls the flexibility of the biopolymer and sets the low temperature limit of its biofunctionality. Finally, we show an MD simulation of a realistic hydrated powder model of lysozyme and demonstrate the agreement of the MD simulation with the experimental data on the FSC phenomenon in the plot of logarithm of the α-relaxation time vs. 1/T. © 2009 IOP Publishing Ltd.

AB - We have observed a Fragile-to-Strong Dynamic Crossover (FSC) phenomenon of the α-relaxation time and self-diffusion constant in hydration water of three biopolymers: lysozyme, B-DNA and RNA. The mean squared displacement (MSD) of hydrogen atoms is measured by Elastic Neutron Scattering (ENS) experiments. The α-relaxation time is measured by Quasi-Elastic Neutron Scattering (QENS) experiments and the self-diffusion constant by Nuclear Magnetic Resonance (NMR) experiments. We discuss the active role of the FSC of the hydration water in initiating the dynamic crossover phenomenon (so-called glass transition) in the biopolymer. The latter transition controls the flexibility of the biopolymer and sets the low temperature limit of its biofunctionality. Finally, we show an MD simulation of a realistic hydrated powder model of lysozyme and demonstrate the agreement of the MD simulation with the experimental data on the FSC phenomenon in the plot of logarithm of the α-relaxation time vs. 1/T. © 2009 IOP Publishing Ltd.

UR - https://www.scopus.com/pages/publications/69549128485

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-69549128485&origin=recordpage

U2 - 10.1088/1742-6596/177/1/012006

DO - 10.1088/1742-6596/177/1/012006

M3 - RGC 21 - Publication in refereed journal

SN - 1742-6588

VL - 177

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

M1 - 012006

ER -

Neutron scattering studies of dynamic crossover phenomena in a coupled system of biopolymer and its hydration water

Abstract

Bibliographical note

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Cite this