scholarly journals Influence of monovalent ions on density fluctuations in hydrothermal aqueous solutions by small angle X-ray scattering

2012 ◽  
Vol 136 (4) ◽  
pp. 044515 ◽  
Author(s):  
Cécile Da Silva - Cadoux ◽  
Jean-Louis Hazemann ◽  
Denis Testemale ◽  
Olivier Proux ◽  
Cyrille Rochas
Keyword(s):  
Aqueous Solutions ◽  
Small Angle ◽  
Density Fluctuations ◽  
X Ray ◽  
X Ray Scattering ◽  
Monovalent Ions ◽  
Ray Scattering

scholarly journals TEMPO-oxidised cellulose nanofibrils; probing the mechanisms of gelation via small angle X-ray scattering

2018 ◽  
Vol 20 (23) ◽  
pp. 16012-16020 ◽  
Author(s):  
Julien Schmitt ◽  
Vincenzo Calabrese ◽  
Marcelo A. da Silva ◽  
Saskia Lindhoud ◽  
Viveka Alfredsson ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Small Angle ◽  
Cellulose Nanofibrils ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

The structure of dispersions of TEMPO-oxidised cellulose nanofibrils at various concentrations, in water and in NaCl aqueous solutions, was probed using small angle X-ray scattering and results were compared with rheology.

scholarly journals Small-angle X-ray scattering study on conformation of poly(sodium L-glutamate) in NaCl and NaF aqueous solutions

2007 ◽  
Vol 40 (s1) ◽  
pp. s553-s557 ◽  
Author(s):  
Shigeru Shimizu ◽  
Yoshio Muroga ◽  
Tatsuya Hyono ◽  
Kimio Kurita
Keyword(s):  
Aqueous Solutions ◽  
Small Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Study ◽  
Ray Scattering

Study of Aggregates of Fullerene-Based Ionomers in Aqueous Solutions Using Small Angle Neutron and X-ray Scattering

1999 ◽  
Vol 103 (7) ◽  
pp. 1059-1063 ◽  
Author(s):  
U-Ser Jeng ◽  
Tsang-Lang Lin ◽  
Cheng-Si Tsao ◽  
Chih-Hao Lee ◽  
Taizoon Canteenwala ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Small Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals The inertia-equivalent ellipsoid: a link between atomic structure and low-resolution models of small globular proteins determined by small-angle X-ray scattering

1992 ◽  
Vol 25 (2) ◽  
pp. 181-191 ◽  
Author(s):  
J. J. Müller ◽  
H. Schrauber
Keyword(s):  
Small Angle ◽  
Computer Experiment ◽  
Density Fluctuations ◽  
Molecular Surface ◽  
Triaxial Ellipsoid ◽  
Correction Factors ◽  
Low Resolution ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Low-resolution three-parameter models of the shape of a biopolymer in solution can be determined by a new indirect method from small-angle X-ray scattering without contrast-variation experiments. The basic low-resolution model employed is a triaxial ellipsoid – the inertia-equivalent ellipsoid (IEE). The IEE is related to the tensor of inertia of a body and the eigenvalues and eigenvectors of this tensor can be calculated directly from the atomic coordinates and from the homogeneous solvent-excluded body of a molecule. The IEE defines a mean molecular surface (like the sea level on earth) which models the molecular shape adequately if the IEE volume is not more than 30% larger than the dry volume of the molecule. Approximately 10 to 15% of the solvent-excluded volume is outside the ellipsoid; the radii of gyration of the IEE and of the homogeneous molecular body are identical. The largest diameter of the IEE is about 5 to 15% (~0.2–0.8 nm) smaller than the maximum dimension of globular molecules with molecular masses smaller than 65000 daltons. From the scattering curve of a molecule in solution the IEE can be determined by a calibration procedure. 29 proteins of known crystal structure have been used as a random sample. Systematic differences between the axes of the IEE, calculated directly from the structure, and the axes of the scattering-equivalent ellipsoids of revolution, estimated from the scattering curve of the molecule in solution, are used to derive correction factors for the axial dimensions. Distortions of model dimensions of 20 to 40% (up to 1 nm), caused by misinterpretation of scattering contributions from electron density fluctuations within the molecule, are reduced to a quarter by applying these correction factors to the axes of the scattering-equivalent ellipsoids of revolution. In a computer experiment the axes of the inertia-equivalent ellipsoids have been determined for a further nine proteins with the same accuracy. The automated estimation of the IEE from the scattering curve of a molecule in solution is realized by the Fortran77 program AUTOIEE.

Characterising density fluctuations in liquid yttria aluminates with small angle x-ray scattering

2009 ◽  
Author(s):  
G. Neville Greaves ◽  
Martin C. Wilding ◽  
Quang Vu Van ◽  
Odile Majérus ◽  
Louis Hennet ◽  
...  
Keyword(s):  
Small Angle ◽  
Density Fluctuations ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Small-angle X-ray scattering study on correlation length and density fluctuations in a supercritical CO2–water mixture

2002 ◽  
Vol 198 (2) ◽  
pp. 251-256 ◽  
Author(s):  
Jianling Zhang ◽  
Juncheng Liu ◽  
Liang Gao ◽  
Xiaogang Zhang ◽  
Zhenshan Hou ◽  
...  
Keyword(s):  
Correlation Length ◽  
Small Angle ◽  
Supercritical Co2 ◽  
Density Fluctuations ◽  
Water Mixture ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Study ◽  
Ray Scattering
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