X-ray absorption edge fine structure spectroscopy of the active site haem of cytochrome c

Nature ◽  
1979 ◽  
Vol 277 (5692) ◽  
pp. 150-151 ◽  
Author(s):  
A. LABHARDT ◽  
C. YUEN
Keyword(s):  
Fine Structure ◽  
Cytochrome C ◽  
Absorption Edge ◽  
Active Site ◽  
X Ray ◽  
X Ray Absorption

Chemical Effect on X-Ray Absorption-Edge Fine Structure

1966 ◽  
pp. 376-392 ◽  
Author(s):  
E. W. White ◽  
H. A. McKinstry
Keyword(s):  
Fine Structure ◽  
Absorption Edge ◽  
Chemical Effect ◽  
X Ray ◽  
X Ray Absorption

XAFS Study of Molten ZrCl4 in LiCl-KCl Eutectic

2002 ◽  
Vol 57 (5) ◽  
pp. 277-280 ◽  
Author(s):  
Yoshihiro Okamoto ◽  
Haruhiko Motohashi
Keyword(s):  
Fine Structure ◽  
Coordination Number ◽  
Curve Fitting ◽  
Absorption Edge ◽  
Local Structure ◽  
Molten Mixture ◽  
X Ray ◽  
Absorption Fine ◽  
Curve Fitting Analysis ◽  
X Ray Absorption

The local structure of motlen ZrCl4 in LiCl-KCl eutectic was investigated by using an X-ray absorption fine structure (XAFS) of the Zr K-absorption edge. The nearest Zr4+-Cl- distance and coordination number from the curve fitting analysis were (2.51±0.02) Å and 5.9±0.6, respectively. These suggest that a 6-fold coordination (ZrCl6)2- is predominant in the molten mixture.

Reactivity of the laccase trinuclear copper active site with dioxygen: an x-ray absorption edge study

1990 ◽  
Vol 112 (6) ◽  
pp. 2243-2249 ◽  
Author(s):  
James L. Cole ◽  
Grace O. Tan ◽  
Edward K. Yang ◽  
Keith O. Hodgson ◽  
Edward I. Solomon
Keyword(s):  
Absorption Edge ◽  
Active Site ◽  
X Ray ◽  
X Ray Absorption

scholarly journals X-ray absorption edge studies on cyanide-bound cytochrome c oxidase

FEBS Letters ◽  
1977 ◽  
Vol 84 (2) ◽  
pp. 287-290 ◽  
Author(s):  
Valerie W. Hu ◽  
Sunney I. Chan
Keyword(s):  
Cytochrome C ◽  
Cytochrome C Oxidase ◽  
Absorption Edge ◽  
X Ray ◽  
X Ray Absorption

An extended x-ray absorption fine structure investigation of the structure of the active site of lactoperoxidase

Biochemistry ◽  
1993 ◽  
Vol 32 (11) ◽  
pp. 2780-2786 ◽  
Author(s):  
C. S. Chang ◽  
R. Sinclair ◽  
S. Khalid ◽  
I. Yamazaki ◽  
S. Nakamura ◽  
...  
Keyword(s):  
Fine Structure ◽  
Active Site ◽  
Structure Investigation ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

An EXAFS study of photographic development in thermographic films

2007 ◽  
Vol 22 (2) ◽  
pp. 122-125 ◽  
Author(s):  
T. N. Blanton ◽  
D. R. Whitcomb ◽  
S. T. Misture
Keyword(s):  
Fine Structure ◽  
Absorption Edge ◽  
Thermal Processing ◽  
Real Space ◽  
Metallic Silver ◽  
X Ray ◽  
The Real ◽  
Edge Location ◽  
Exafs Study ◽  
X Ray Absorption

Silver K edge extended X-ray absorption fine structure (EXAFS) spectroscopy of films containing silver behenate (AgBeh) in the unprocessed, fully processed, and step-processed states has been performed. The results of the EXAFS analysis indicate that the intensity for the real-space peak for the Ag-O distance (∼2.3 Å) decreases while the real-space peak for the Ag-Ag distance (∼2.9 Å) grows with increasing thermal processing of the film. The changes observed in the real-space EXAFS signal indicate the growth of metallic silver at the expense of AgBeh. The X-ray absorption near-edge spectroscopy (XANES) portion of the signal shows that the absorption edge position varies stepwise, with unprocessed films and pure AgBeh having an edge location at 25 506 eV, films processed from steps 1 through 10 have an absorption edge at 25 508 eV, and the fully processed film has an edge location at 25 512 eV.

ChemInform Abstract: STRUCTURAL STUDIES OF THE HEMOCYANIN ACTIVE SITE. 1. EXTENDED X-RAY ABSORPTION FINE STRUCTURE (EXAFS) ANALYSIS

1980 ◽  
Vol 11 (36) ◽  
Author(s):  
J. M. BROWN ◽  
L. POWERS ◽  
B. KINCAID ◽  
J. A. LARRABEE ◽  
T. G. SPIRO
Keyword(s):  
Fine Structure ◽  
Active Site ◽  
Structural Studies ◽  
X Ray ◽  
Exafs Analysis ◽  
Absorption Fine ◽  
X Ray Absorption

Metal incorporation in sputter-deposited MoS2 films studied by extended x-ray absorption fine structure

1995 ◽  
Vol 10 (8) ◽  
pp. 2091-2105 ◽  
Author(s):  
Jeffrey R. Lince ◽  
Michael R. Hilton ◽  
Arun S. Bommannavar
Keyword(s):  
Fine Structure ◽  
Absorption Edge ◽  
Electrical Contacts ◽  
Range Order ◽  
X Ray ◽  
Absorption Fine ◽  
Ni Content ◽  
Crystalline Films ◽  
Sputter Deposited ◽  
X Ray Absorption

Solid lubricant films produced by cosputtering metals with MoS2 and by forming metal/MoS2 multilayers are being planned for use in the next generation of solid lubricated devices on spacecraft, including gimbal and sensor bearings, actuators, and sliding electrical contacts. The films exhibit increased densities and wear lives compared to films without additives, but the mechanism of density enhancement is not well understood. The extended x-ray absorption fine structure (EXAFS) technique is ideal for elucidating the structure of these poorly crystalline films. We analyzed MoS2 films cosputtered with 0, 2, and 10% Ni, as well as Ni/MoS2 and Au(Pd)/MoS2 multilayer films. The results obtained at the Mo-K absorption edge showed that the metal-containing films comprised predominantly the same nanocrystalline phases present in similar films without added metals: pure MoS2 and a MoS2−xOx phase. MoS2−xOx is isostructural with MoS2, with O atoms substituting for S atoms in the MoS2 crystal lattice. For all Ni-containing films, EXAFS data obtained at the Ni-K absorption edge showed that the Ni had not chemically reacted with the MoS2−xOx and MoS2, but formed a disordered NiOx phase. However, Ni-cosputtered films showed decreasing Mo-Mo bond lengths in the MoS2−xOx phase with increasing Ni content, probably due to preferential oxidation of Ni compared to MoS2. EXAFS of these Ni-cosputtcred films showed only a small decrease in short-range order with Ni content, while x-ray diffraction showed a concurrent large decrease in long-range order. The results indicate that film densification in Ni-cosputtered films is caused by NiOx formation at the edges of nucleating MoS2−xOx/MoS2 crystallites, limiting the crystallite size attainable within the films.

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