High‐Throughput and Time‐Resolved Energy‐Dispersive X‐Ray Diffraction (EDXRD) Study of the Formation of CAU‐1‐(OH) 2 : Microwave and Conventional Heating

2011 ◽  
Vol 17 (23) ◽  
pp. 6462-6468 ◽  
Author(s):  
Tim Ahnfeldt ◽  
Jens Moellmer ◽  
Vincent Guillerm ◽  
Reiner Staudt ◽  
Christian Serre ◽  
...  
Keyword(s):  
High Throughput ◽  
Energy Dispersive ◽  
Conventional Heating ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray

scholarly journals Dynamic contact strain measurement by time-resolved stroboscopic energy dispersive synchrotron X-ray diffraction

Strain ◽  
2017 ◽  
Vol 53 (2) ◽  
pp. e12221 ◽  
Author(s):  
M. Mostafavi ◽  
D. M. Collins ◽  
M. J. Peel ◽  
C. Reinhard ◽  
S. M. Barhli ◽  
...  
Keyword(s):  
Strain Measurement ◽  
Dynamic Contact ◽  
Energy Dispersive ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray

A furnace for the in situ study of the formation of inorganic solids at high temperature using time-resolved energy-dispersive x-ray diffraction

2000 ◽  
Vol 71 (11) ◽  
pp. 4177 ◽  
Author(s):  
Margret J. Geselbracht ◽  
Richard I. Walton ◽  
E. Sarah Cowell ◽  
Franck Millange ◽  
Dermot O’Hare
Keyword(s):  
High Temperature ◽  
Energy Dispersive ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Inorganic Solids ◽  
In Situ Study

A kinetic investigation of gibbsite precipitation using in situ time resolved energy dispersive X-ray diffraction

2000 ◽  
Vol 2 (16) ◽  
pp. 3597-3604 ◽  
Author(s):  
Joanne S. C. Loh ◽  
Andrew M. Fogg ◽  
Helen R. Watling ◽  
Gordon M. Parkinson ◽  
Dermot O'Hare
Keyword(s):  
Energy Dispersive ◽  
Kinetic Investigation ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray

Determination of the kinetics of crystallisation of gibbsite using time resolved in situ energy dispersive powder X-ray diffraction

2000 ◽  
Vol 10 (10) ◽  
pp. 2355-2357 ◽  
Author(s):  
Andrew M. Fogg ◽  
Stephen J. Price ◽  
Robin J. Francis ◽  
Stephen O'Brien ◽  
Dermot O'Hare
Keyword(s):  
Energy Dispersive ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Kinetics Of

Crystallisation Kinetics of Metal Organic Frameworks From in situ Time-Resolved X-ray Diffraction

2013 ◽  
Vol 28 (S2) ◽  
pp. S256-S275 ◽  
Author(s):  
Racha El Osta ◽  
Mark Feyand ◽  
Norbert Stock ◽  
Franck Millange ◽  
Richard I. Walton
Keyword(s):  
Microwave Heating ◽  
Metal Organic Framework ◽  
Diffraction Method ◽  
Porous Metal ◽  
Activation Energies ◽  
Conventional Heating ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Metal Organic

A time-resolved powder diffraction study of the crystallisation of porous metal organic framework materials with the CPO-27 structure ([M2(dhtp)(H2O)2]·8H2O where, dhtp=2,5-dioxoterephthalate) using the energy dispersive X-ray diffraction method is described. Crystallisation under solvothermal conditions is performed between 70 - 110 °C from clear solutions of metal salts (M=Co2+ or Ni2+) and 2,5-dihydroxyterephthalic acid in a mixture of THF-water in sealed reaction vessels, using both conventional and microwave heating. Integration of Bragg peak areas with time provides accurate crystallisation curves, which are modelled using the method of Gualtieri to determine rate constants for nucleation and for growth and then, by Arrhenius analysis, activation energies. Crystallisation is determined to be one-dimensional, consistent with the elongated morphology of the crystals produced in these reactions. With conventional heating the Co-containing CPO-27 crystallises more rapidly than the isostructural Ni-containing analogue and analysis of the kinetic parameters would suggest a complex multi-step crystallisation process. The effect of microwave heating is upon activation energies: the values for both nucleation and for crystal growth are lowered compared to reactions using conventional heating.

Structural Characterization of Gallbladder Stones Using Energy Dispersive X-ray Spectroscopy and X-ray Diffraction

2018 ◽  
Vol 21 (7) ◽  
pp. 495-500 ◽  
Author(s):  
Hassan A. Almarshad ◽  
Sayed M. Badawy ◽  
Abdalkarem F. Alsharari
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Energy Dispersive ◽  
Spectroscopic Techniques ◽  
X Ray Diffraction ◽  
Major Health Problem ◽  
X Ray ◽  
Gallbladder Stones ◽  
Pure Cholesterol ◽  
Scanning Electron

Aim and Objective: Formation of the gallbladder stones is a common disease and a major health problem. The present study aimed to identify the structures of the most common types of gallbladder stones using X-ray spectroscopic techniques, which provide information about the process of stone formation. Material and Method: Phase and elemental compositions of pure cholesterol and mixed gallstones removed from gallbladders of patients were studied using energy-dispersive X-ray spectroscopy combined with scanning electron microscopy analysis and X-ray diffraction. Results: The crystal structures of gallstones which coincide with standard patterns were confirmed by X-ray diffraction. Plate-like cholesterol crystals with laminar shaped and thin layered structures were clearly observed for gallstone of pure cholesterol by scanning electron microscopy; it also revealed different morphologies from mixed cholesterol stones. Elemental analysis of pure cholesterol and mixed gallstones using energy-dispersive X-ray spectroscopy confirmed the different formation processes of the different types of gallstones. Conclusion: The method of fast and reliable X-ray spectroscopic techniques has numerous advantages over the traditional chemical analysis and other analytical techniques. The results also revealed that the X-ray spectroscopy technique is a promising technique that can aid in understanding the pathogenesis of gallstone disease.

Sign in / Sign up

Export Citation Format

Share Document