scholarly journals Study of the Boson Peak and Fragility of Bioprotectant Glass-Forming Mixtures by Neutron Scattering

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
F. Migliardo ◽  
S. Magazù ◽  
M. A. Gonzalez ◽  
C. Mondelli
Keyword(s):  
Data Analysis ◽  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Review Article ◽  
Boson Peak ◽  
Simulation Studies ◽  
Glycerol Content ◽  
Rutherford Appleton Laboratory ◽  
Glass Forming

The biological relevance of trehalose, glycerol, and their mixtures in several anhydrobiotic and cryobiotic organisms has recently promoted both experimental and simulation studies. In addition, these systems are employed in different industrial fields, such as pharmaceutical and cosmetic industries, as additives in mixtures for cryopreservation and in several formulations. This review article shows an overview of Inelastic Neutron Scattering (INS) data, collected at different temperature values by the OSIRIS time-of-flight spectrometer at the ISIS Facility (Rutherford Appleton Laboratory, Oxford, UK) and by the IN4 and IN6 spectrometers at the Institut Laue Langevin (ILL, Grenoble, France), on trehalose/glycerol mixtures as a function of the glycerol content. The data analysis allows determining the Boson peak behavior and discussing the findings in terms of fragility in relation to the bioprotective action of trehalose and glycerol.

Inelastic neutron scattering study of a glass-forming liquid in soft confinement

Soft Matter ◽  
2008 ◽  
Vol 4 (3) ◽  
pp. 522-533 ◽  
Author(s):  
Reiner Zorn ◽  
Maria Mayorova ◽  
Dieter Richter ◽  
Bernhard Frick
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Glass Forming ◽  
Scattering Study ◽  
Neutron Scattering Study

Inelastic neutron scattering for investigating the dynamics of confined glass-forming liquids

2005 ◽  
Vol 351 (33-36) ◽  
pp. 2657-2667 ◽  
Author(s):  
B. Frick ◽  
C. Alba-Simionesco ◽  
G. Dosseh ◽  
C. Le Quellec ◽  
A.J. Moreno ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Glass Forming

Inelastic neutron scattering experiments on the fast dynamics of a glass forming liquid in mesoscopic confinements

2000 ◽  
Vol 10 (PR7) ◽  
pp. Pr7-83-Pr7-86 ◽  
Author(s):  
R. Zorn ◽  
D. Richter ◽  
L. Hartmann ◽  
F. Kremer ◽  
B. Frick
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Glass Forming

Floppy modes and the Boson peak in crystalline and amorphous silicates: an inelastic neutron scattering study

2000 ◽  
Vol 64 (3) ◽  
pp. 435-440 ◽  
Author(s):  
M. J. Harris ◽  
M. T. Dove ◽  
J. M. Parker
Keyword(s):  
Neutron Scattering ◽  
Amorphous Materials ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Boson Peak ◽  
Pure Silica ◽  
Transverse Acoustic ◽  
Scattering Study ◽  
Neutron Scattering Study

AbstractWe present the results of an inelastic neutron scattering study of a crystalline polymorph of SiO2 (α-quartz), and a number of silicate glasses (pure silica, SiO2, and three glasses in the alkali series (K,Li)2Si2O5). We demonstrate the presence of the Boson peak in the inelastic spectra of the crystalline and amorphous materials and argue that it arises simply from the dispersion characteristics of transverse acoustic modes. Furthermore, we investigate the role of the lower-energy floppy modes in the inelastic spectra, and show that they are controlled by chemical effects.

Incoherent inelastic neutron-scattering studies of the structure of water associated with DNA and gelatin

2003 ◽  
Vol 81 (1-2) ◽  
pp. 367-371 ◽  
Author(s):  
I A Beta ◽  
A I Kolesnikov ◽  
I Michalarias ◽  
G L Wu ◽  
R C Ford ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Rutherford Appleton Laboratory ◽  
Structure Of Water ◽  
Amorphous Ice ◽  
Energy Transfers ◽  
Optical Region ◽  
Scattering Spectra ◽  
Water Contents

Incoherent inelastic neutron-scattering spectra of DNA and gelatin samples with different hydration levels were measured with the TOSCA spectrometer at ISIS, Rutherford Appleton Laboratory. Comparison with the spectra of different ice phases shows that for water contents up to 0.75 g water/g DNA and 0.5 g water/g gelatin the optical region (20–50 meV) is almost featureless, similar to high-density amorphous ice (HDA). The librational band is shifted to lower energy transfers and its edge at 55 meV matches again the spectrum of HDA ice. For water contents of 1 g water/g DNA and 0.75 g water/g gelatin resemblance to spectra of ice Ih and low-density amorphous ice (LDA) is obvious. PACS Nos.: 61.12Ex, 82.39Jn

The Boson Peak of Amyloid Fibrils: Probing the Softness of Protein Aggregates by Inelastic Neutron Scattering

2014 ◽  
Vol 118 (11) ◽  
pp. 2913-2923 ◽  
Author(s):  
G. Schirò ◽  
V. Vetri ◽  
C.B. Andersen ◽  
F. Natali ◽  
M.M. Koza ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Amyloid Fibrils ◽  
Inelastic Neutron Scattering ◽  
Protein Aggregates ◽  
Inelastic Neutron ◽  
Boson Peak

Inelastic neutron scattering experiments on the dynamics of a glass-forming material in mesoscopic confinement

2002 ◽  
Vol 307-310 ◽  
pp. 547-554 ◽  
Author(s):  
Reiner Zorn ◽  
Lutz Hartmann ◽  
Bernhard Frick ◽  
Dieter Richter ◽  
Friedrich Kremer
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Glass Forming

Anomalous vibrational modes in acetanilide as studied by inelastic neutron scattering

1992 ◽  
Vol 2 (10) ◽  
pp. 1929-1939 ◽  
Author(s):  
Mariette Barthes ◽  
Juegen Eckert ◽  
Susanna W. Johnson ◽  
Jacques Moret ◽  
Basil I. Swanson ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Vibrational Modes
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