Microprobe X-ray Absorption Spectroscopic Determination of the Oxidation State of Intracellular Chromium following Exposure of V79 Chinese Hamster Lung Cells to Genotoxic Chromium Complexes

1997 ◽  
Vol 10 (5) ◽  
pp. 533-535 ◽  
Author(s):  
Carolyn T. Dillon ◽  
Peter A. Lay ◽  
Marian Cholewa ◽  
George J. F. Legge ◽  
Antonio M. Bonin ◽  
...  
Keyword(s):  
Oxidation State ◽  
Chinese Hamster ◽  
Spectroscopic Determination ◽  
Lung Cells ◽  
Chromium Complexes ◽  
X Ray ◽  
X Ray Absorption

Oxidation state and electronic configuration determination of copper in tetrahedrite group minerals by L-edge X-ray absorption spectroscopy

1993 ◽  
Vol 20 (6) ◽  
pp. 395-401 ◽  
Author(s):  
R. A. D. Pattrick ◽  
G. van der Laan ◽  
D. J. Vaughan ◽  
C. M. B. Henderson
Keyword(s):  
Oxidation State ◽  
Absorption Spectroscopy ◽  
Electronic Configuration ◽  
X Ray ◽  
X Ray Absorption ◽  
Determination Of Copper

Direct determination of oxidation state of gold deposits in metal-reducing bacterium Shewanella algae using X-ray absorption near-edge structure spectroscopy (XANES)

2007 ◽  
Vol 103 (6) ◽  
pp. 568-571 ◽  
Author(s):  
Yasuhiro Konishi ◽  
Takeshi Tsukiyama ◽  
Norizoh Saitoh ◽  
Toshiyuki Nomura ◽  
Shinsuke Nagamine ◽  
...  
Keyword(s):  
Oxidation State ◽  
Direct Determination ◽  
Gold Deposits ◽  
Edge Structure ◽  
X Ray ◽  
Shewanella Algae ◽  
X Ray Absorption

X-ray absorption edge determination of the oxidation state and coordination number of copper. Application to the type 3 site in Rhus vernicifera laccase and its reaction with oxygen

1987 ◽  
Vol 109 (21) ◽  
pp. 6433-6442 ◽  
Author(s):  
Lung Shan Kau ◽  
Darlene J. Spira-Solomon ◽  
James E. Penner-Hahn ◽  
Keith O. Hodgson ◽  
Edward I. Solomon
Keyword(s):  
Coordination Number ◽  
Oxidation State ◽  
Absorption Edge ◽  
X Ray ◽  
Rhus Vernicifera ◽  
Type 3 ◽  
X Ray Absorption

scholarly journals Signatures of technetium oxidation states: a new approach

2020 ◽  
Vol 56 (67) ◽  
pp. 9608-9611
Author(s):  
Stephen Bauters ◽  
Andreas C. Scheinost ◽  
Katja Schmeide ◽  
Stephan Weiss ◽  
Kathy Dardenne ◽  
...  
Keyword(s):  
Oxidation State ◽  
Oxidation States ◽  
General Strategy ◽  
New Approach ◽  
X Ray ◽  
X Ray Absorption

A general strategy for the determination of Tc oxidation state by a new approach involving X-ray absorption near edge spectroscopy (XANES) at the Tc L3 edge is shown.

EELS and Xanes Analysis of Plutonium and Cerium Edges From Titanate Ceramics for Fissile Materials Disposal

1999 ◽  
Vol 5 (S2) ◽  
pp. 768-769
Author(s):  
J.A. Fortner ◽  
E.C. Buck ◽  
A.J. Kropf ◽  
A.J. Bakel ◽  
M.C. Hash ◽  
...  
Keyword(s):  
Oxidation State ◽  
Electron Loss ◽  
Edge Structure ◽  
X Ray ◽  
Titanate Ceramics ◽  
X Ray Absorption ◽  
Photon Source ◽  
Titanate Ceramic ◽  
Exafs Spectra

We report x-ray absorption near edge structure (XANES) and extended x-ray fine structure analysis (EXAFS) spectra from the plutonium Llll and cerium Lm edges in prototype titanate ceramic hosts for disposal of surplus fissile materials. These spectra were obtained using the MRCAT beamline at the Advanced Photon Source (APS). The XANES and EXAFS results are compared with electron loss spectra (EELS) determination of oxidation state from the plutonium MlV,V and cerium MlV,V edges [1,2]. The titanate ceramics studied are based upon the hafniumpyrochlore and zirconolite mineral structures and will serve as an immobilization host, containing as much as 10 weight % fissile plutonium, and 20 weight % (natural or depleted) uranium. Similar formulations were composed using cerium as a “surrogate” element, replacing both plutonium and uranium in the ceramic matrix. We find the plutonium to be present almost entirely as Pu (IV), while the cerium is clearly in a mixed III-IV oxidation state in the surrogate ceramic.

In situ determination of the nickel oxidation state in La2NiO4+δ and La4Ni3O10−δ using X-ray absorption near-edge structure

2011 ◽  
Vol 21 (46) ◽  
pp. 18592 ◽  
Author(s):  
Russell J. Woolley ◽  
Benoit N. Illy ◽  
Mary P. Ryan ◽  
Stephen J. Skinner
Keyword(s):  
Oxidation State ◽  
Edge Structure ◽  
X Ray ◽  
Nickel Oxidation ◽  
X Ray Absorption

Determination of the oxidation state of cerium in rocks by Ce LIII-edge X-ray absorption near-edge structure spectroscopy

2002 ◽  
Vol 468 (2) ◽  
pp. 345-354 ◽  
Author(s):  
Yoshio Takahashi ◽  
Hiroshi Sakami ◽  
Masaharu Nomura
Keyword(s):  
Oxidation State ◽  
Edge Structure ◽  
X Ray ◽  
X Ray Absorption

Oxidation state determination of plutonium aquo ions using x-ray absorption spectroscopy

Polyhedron ◽  
1998 ◽  
Vol 17 (4) ◽  
pp. 599-602 ◽  
Author(s):  
Steven D. Conradson ◽  
Ilham Al Mahamid ◽  
David L. Clark ◽  
Nancy J. Hess ◽  
Eric A. Hudson ◽  
...  
Keyword(s):  
Oxidation State ◽  
Absorption Spectroscopy ◽  
X Ray ◽  
State Determination ◽  
X Ray Absorption

scholarly journals Chemical state mapping of simulant Chernobyl lava-like fuel containing material using micro-focused synchrotron X-ray spectroscopy

2021 ◽  
Vol 28 (6) ◽  
Author(s):  
Hao Ding ◽  
Malin C. Dixon Wilkins ◽  
Lucy M. Mottram ◽  
Lewis R. Blackburn ◽  
Daniel Grolimund ◽  
...  
Keyword(s):  
Oxidation State ◽  
Fuel Cycle ◽  
Chemical State ◽  
X Ray Diffraction ◽  
Excitation Energies ◽  
Essential Information ◽  
X Ray ◽  
Redox Active ◽  
X Ray Absorption

Uranium speciation and redox behaviour is of critical importance in the nuclear fuel cycle. X-ray absorption near-edge spectroscopy (XANES) is commonly used to probe the oxidation state and speciation of uranium, and other elements, at the macroscopic and microscopic scale, within nuclear materials. Two-dimensional (2D) speciation maps, derived from microfocus X-ray fluorescence and XANES data, provide essential information on the spatial variation and gradients of the oxidation state of redox active elements such as uranium. In the present work, we elaborate and evaluate approaches to the construction of 2D speciation maps, in an effort to maximize sensitivity to the U oxidation state at the U L 3-edge, applied to a suite of synthetic Chernobyl lava specimens. Our analysis shows that calibration of speciation maps can be improved by determination of the normalized X-ray absorption at excitation energies selected to maximize oxidation state contrast. The maps are calibrated to the normalized absorption of U L 3 XANES spectra of relevant reference compounds, modelled using a combination of arctangent and pseudo-Voigt functions (to represent the photoelectric absorption and multiple-scattering contributions). We validate this approach by microfocus X-ray diffraction and XANES analysis of points of interest, which afford average U oxidation states in excellent agreement with those estimated from the chemical state maps. This simple and easy-to-implement approach is general and transferrable, and will assist in the future analysis of real lava-like fuel-containing materials to understand their environmental degradation, which is a source of radioactive dust production within the Chernobyl shelter.

ChemInform Abstract: X-Ray Absorption Edge Determination of the Oxidation State and Coordination Number of Copper: Application to the Type 3 Site in Rhus vernicifera Laccase and Its Reaction with Oxygen

ChemInform ◽  
1988 ◽  
Vol 19 (6) ◽  
Author(s):  
L.-S. KAU ◽  
D. J. SPIRA-SOLOMON ◽  
J. E. PENNER-HAHN ◽  
K. O. HODGSON ◽  
E. I. SOLOMON
Keyword(s):  
Coordination Number ◽  
Oxidation State ◽  
Absorption Edge ◽  
X Ray ◽  
Rhus Vernicifera ◽  
Type 3 ◽  
X Ray Absorption
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