CopK from Cupriavidus metallidurans CH34 Binds Cu(I) in a Tetrathioether Site: Characterization by X-ray Absorption and NMR Spectroscopy

2010 ◽  
Vol 132 (11) ◽  
pp. 3770-3777 ◽  
Author(s):  
Géraldine Sarret ◽  
Adrien Favier ◽  
Jacques Covès ◽  
Jean-Louis Hazemann ◽  
Max Mergeay ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Site Characterization ◽  
Cupriavidus Metallidurans Ch34 ◽  
X Ray ◽  
Cupriavidus Metallidurans ◽  
X Ray Absorption

scholarly journals Seleno-l-Methionine Is the Predominant Organic Form of Selenium in Cupriavidus metallidurans CH34 Exposed to Selenite or Selenate

2006 ◽  
Vol 72 (9) ◽  
pp. 6414-6416 ◽  
Author(s):  
Laure Avoscan ◽  
Richard Collins ◽  
Marie Carriere ◽  
Barbara Gouget ◽  
Jacques Cov�s
Keyword(s):  
Inductively Coupled Plasma ◽  
High Performance ◽  
Organic Form ◽  
Edge Structure ◽  
Cupriavidus Metallidurans Ch34 ◽  
X Ray ◽  
Inductively Coupled ◽  
Cupriavidus Metallidurans ◽  
Plasma Mass Spectrometry ◽  
X Ray Absorption

ABSTRACT The accumulated organic form of selenium previously detected by X-ray absorption near-edge structure (XANES) analyses in Cupriavidus metallidurans CH34 exposed to selenite or selenate was identified as seleno-l-methionine by coupling high-performance liquid chromatography to inductively coupled plasma-mass spectrometry.

scholarly journals Enhanced Selenate Accumulation in Cupriavidus metallidurans CH34 Does Not Trigger a Detoxification Pathway

2009 ◽  
Vol 75 (7) ◽  
pp. 2250-2252 ◽  
Author(s):  
Laure Avoscan ◽  
Marie Carrière ◽  
Olivier Proux ◽  
Géraldine Sarret ◽  
Jéril Degrouard ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Absorption Spectroscopy ◽  
Energy Dispersive ◽  
Rich Medium ◽  
Cupriavidus Metallidurans Ch34 ◽  
X Ray ◽  
Cupriavidus Metallidurans ◽  
X Ray Absorption ◽  
Detoxification Pathway

ABSTRACT Cupriavidus metallidurans CH34 cells grown under sulfate-limited conditions accumulated up to six times more selenate than cells grown in sulfate-rich medium. The products of selenate reduction detected by X-ray absorption spectroscopy, electron microscopy, and energy-dispersive X-ray analysis did not define this strain as being a good candidate for bioremediation of selenate-contaminated environments.

scholarly journals Solvent-dependent nuclearity, geometry and catalytic activity of [(SPhos)Pd(Ph)Cl]2

2017 ◽  
Vol 46 (22) ◽  
pp. 7223-7231 ◽  
Author(s):  
John B. Brazier ◽  
Mark A. Newton ◽  
Elena M. Barreiro ◽  
Luis A. Adrio ◽  
Leticia Naya ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Catalytic Activity ◽  
Fine Structure ◽  
Nmr Spectroscopy ◽  
Dft Calculations ◽  
Palladium Complex ◽  
Exafs Spectroscopy ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

The nuclearity and structures of the palladium complex [(SPhos)Pd(Ph)Cl]2 in the solid and solution states are revisited using a combination of Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy, NMR spectroscopy, mass spectrometry, DFT calculations and trapping experiments.

scholarly journals From single-site tantalum complexes to nanoparticles of TaxNy and TaOxNy supported on silica: elucidation of synthesis chemistry by dynamic nuclear polarization surface enhanced NMR spectroscopy and X-ray absorption spectroscopy

2017 ◽  
Vol 8 (8) ◽  
pp. 5650-5661 ◽  
Author(s):  
Janet C. Mohandas ◽  
Edy Abou-Hamad ◽  
Emmanuel Callens ◽  
Manoja K. Samantaray ◽  
David Gajan ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Absorption Spectroscopy ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Single Site ◽  
X Ray ◽  
Surface Enhanced ◽  
X Ray Absorption

SOMC is exploited for synthesizing very fine nanoparticles of TaxNy/TaOxNy on silica, elucidating the strategies with DNP SENS and EXAFS.

Speciation of Chlorometallate Ionic Liquids Based on Gallium(III) and Indium(III)

2010 ◽  
Vol 63 (5) ◽  
pp. 845 ◽  
Author(s):  
Christopher Hardacre ◽  
Richard W. Murphy ◽  
Kenneth R. Seddon ◽  
Geetha Srinivasan ◽  
Małgorzata Swadźba-Kwaśny
Keyword(s):  
Ionic Liquids ◽  
Fine Structure ◽  
Nmr Spectroscopy ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

A range of ionic liquids was prepared by mixing 1-alkyl-3-methylimidazolium chloride with gallium(iii) chloride or indium(iii) chloride in various ratios, producing both acidic and basic compositions. Their speciation was investigated using 71Ga NMR or 115In NMR spectroscopy, as well as extended X-ray absorption fine structure. Polynuclear Lewis acidic anions, [MxCl3x+1]–, were found in chlorogallate(iii) ionic liquids, but not in chloroindate(iii) systems.

Investigation of the Local Structure of the LiNi[sub 0.5]Mn[sub 0.5]O[sub 2] Cathode Material during Electrochemical Cycling by X-Ray Absorption and NMR Spectroscopy

2002 ◽  
Vol 5 (11) ◽  
pp. A263 ◽  
Author(s):  
Won-Sub Yoon ◽  
Younkee Paik ◽  
Xiao-Qing Yang ◽  
Mahalingam Balasubramanian ◽  
James McBreen ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Cathode Material ◽  
Local Structure ◽  
X Ray ◽  
Electrochemical Cycling ◽  
X Ray Absorption

X-ray Absorption and Solid-State NMR Spectroscopy of Fluorinated Proton Conducting Polymers

2018 ◽  
Vol 122 (6) ◽  
pp. 3233-3244 ◽  
Author(s):  
Z. Blossom Yan ◽  
Robin Hayes ◽  
Lis G. A. Melo ◽  
Gillian R. Goward ◽  
Adam P. Hitchcock
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Conducting Polymers ◽  
Solid State Nmr ◽  
Proton Conducting ◽  
X Ray ◽  
Solid State Nmr Spectroscopy ◽  
X Ray Absorption

X-ray microanalysis of thin specimens in the transmission electron microscope at voltages up to 1000 Kv.

1978 ◽  
Vol 36 (1) ◽  
pp. 540-541
Author(s):  
G. Cliff ◽  
M.J. Nasir ◽  
G.W. Lorimer ◽  
N. Ridley
Keyword(s):  
Electron Microscope ◽  
Transmission Electron Microscope ◽  
Weight Fraction ◽  
Present Series ◽  
Constant Independent ◽  
X Ray ◽  
Transmission Electron ◽  
Series Of Experiments ◽  
Image Position ◽  
X Ray Absorption

In a specimen which is transmission thin to 100 kV electrons - a sample in which X-ray absorption is so insignificant that it can be neglected and where fluorescence effects can generally be ignored (1,2) - a ratio of characteristic X-ray intensities, I1/I2 can be converted into a weight fraction ratio, C1/C2, using the equationwhere k12 is, at a given voltage, a constant independent of composition or thickness, k12 values can be determined experimentally from thin standards (3) or calculated (4,6). Both experimental and calculated k12 values have been obtained for K(11<Z>19),kα(Z>19) and some Lα radiation (3,6) at 100 kV. The object of the present series of experiments was to experimentally determine k12 values at voltages between 200 and 1000 kV and to compare these with calculated values.The experiments were carried out on an AEI-EM7 HVEM fitted with an energy dispersive X-ray detector.

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