scholarly journals Effect of Crowding Agent Polyethylene Glycol on Lyotropic Chromonic Liquid Crystal Phases of Disodium Cromoglycate

Crystals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 160 ◽  
Author(s):  
Runa Koizumi ◽  
Bing-Xiang Li ◽  
Oleg Lavrentovich
Keyword(s):  
Polyethylene Glycol ◽  
Aqueous Solutions ◽  
Isotropic Phase ◽  
Disodium Cromoglycate ◽  
Wide Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Lateral Distance ◽  
Crystal Phases ◽  
Ray Scattering

Adding crowding agents such as polyethylene glycol (PEG) to lyotropic chromonic liquid crystals (LCLCs) formed by water dispersions of materials such as disodium cromoglicate (DSCG) leads to a phase separation of the isotropic phase and the ordered phase. This behavior resembles nanoscale condensation of DNAs but occurs at the microscale. The structure of condensed chromonic regions in crowded dispersions is not yet fully understood, in particular, it is not clear whether the condensed domains are in the nematic (N) or the columnar (C) state. In this study, we report on small angle X-ray scattering (SAXS) and wide-angle X-ray scattering (WAXS) measurements of mixtures of aqueous solutions of DSCG with PEG and compare results to measurements of aqueous solutions of pure DSCG. X-ray measurements demonstrate that addition of PEG to DSCG in the N phase triggers appearance of the C phase that coexists with the isotropic (I) phase. Within the coexisting region, the lateral distance between the columns of the chromonic aggregates decreases as the temperature is increased.

Investigation of the Structure of Concentrated NaOH Aqueous Solutions by Combining Molecular Dynamics and Wide-Angle X-ray Scattering

2019 ◽  
Vol 123 (24) ◽  
pp. 5121-5130 ◽  
Author(s):  
Amaury Coste ◽  
Arnaud Poulesquen ◽  
Olivier Diat ◽  
Jean-François Dufrêche ◽  
Magali Duvail
Keyword(s):  
Molecular Dynamics ◽  
Aqueous Solutions ◽  
Wide Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

A Revised O2 Reduction Model in Li-O2 Batteries as Revealed by in Situ Small Angle X-Ray Scattering

2019 ◽  
Author(s):  
Christian Prehal ◽  
Aleksej Samojlov ◽  
Manfred Nachtnebel ◽  
Manfred Kriechbaum ◽  
Heinz Amenitsch ◽  
...  
Keyword(s):  
Small Angle ◽  
Wide Angle ◽  
Reduction Mechanism ◽  
Reduction Model ◽  
X Ray ◽  
X Ray Scattering ◽  
O2 Reduction ◽  
Ray Scattering

<b>Here we use in situ small and wide angle X-ray scattering to elucidate unexpected mechanistic insights of the O2 reduction mechanism in Li-O2 batteries.<br></b>

scholarly journals On the amorphous layer in bone mineral and biomimetic apatite: A combined small- and wide-angle X-ray scattering analysis.

2020 ◽  
Author(s):  
Federica Bertolotti ◽  
Francisco J. Carmona ◽  
Gregorio Dal Sasso ◽  
Gloria B. Ramírez-Rodríguez ◽  
José Manuel Delgado-López ◽  
...  
Keyword(s):  
Bone Mineral ◽  
Amorphous Layer ◽  
Wide Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Biomimetic Apatite ◽  
Ray Scattering

Time-resolved isothermal crystallization of absorbable PGA-co-PLA copolymer by synchrotron small-angle X-ray scattering and wide-angle X-ray diffraction

Polymer ◽  
2001 ◽  
Vol 42 (21) ◽  
pp. 8965-8973 ◽  
Author(s):  
Zhi-Gang Wang ◽  
Xuehui Wang ◽  
Benjamin S. Hsiao ◽  
Saša Andjelić ◽  
Dennis Jamiolkowski ◽  
...  
Keyword(s):  
Small Angle ◽  
Isothermal Crystallization ◽  
Wide Angle ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
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.

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