Effects of chemical combination on the X-ray L<sub>III</sub>absorption limits of Mo, Rh, Pd, Ag and Cd

Kawata, Suekichi; Maeda, Keisuke

doi:10.1088/0305-4608/3/1/029

Cited by 21 publications

(1 citation statement)

References 17 publications

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“…The effect of a change in ligand gives a smaller edge shift (of the order of 1-3 eV) than valence state. In the case of lanthanide compounds where the XANES features are very large, the complexing of the metal with the protein will have a unique coordination so that no model compound would be available to mimic the protein-metal complex ligand "' From Kawata and Maeda (1973) and references cited therein.…”

Section: F" and F For Pure Elements With 'Unbound' Atoms With Variabl...mentioning

confidence: 99%

Synchrotron X-radiation protein crystallography: instrumentation, methods and applications

Helliwell

1984

Rep. Prog. Phys.

134

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This review describes the utilisation of synchrotron x-radiation ( SR) in protein crystallography. For the general reader a brief discussion is given of the basics of protein structure analysis including an outline of the problems of sample radiation damage, the inherent weakness of individual reflections and the large amounts of data that need to be collected as well as the 'phase problem' of crystallography. The properties of synchrotron radiation emitted by relativistic electrons in simple circular orbits in bending magnets and by more sophisticated electron motions induced in wiggler or undulator magnets are discussed. The impact of newer high brightness synchrotron radiation sources in protein crystallography is assessed. The instrumentation required to monochromatise and focus the radiation onto typically small protein crystal samples and to detect the diffraction pattern is described. Both step scanning and energy dispersive techniques to optimise anomalous dispersion are covered. A gazetteer is given of the instruments providing data collection facilities for protein crystallography which are available on SR sources around the world. The modifications that are needed to standard data processing techniques are dealt with, taking account, for instance, of the position, angle and wavelength correlateable properties of photons incident to a sample from an SR source; properties which affect reflection prediction in both camera or diffractometer work.Applications of the high intensity and collimation are surveyed with specific examples given of data collection at high resolution, from large unit cells and small crystals as well as time-resolved crystallography. The use of the source tunability to optimise anomalous dispersion effects for metal-atom location and the phasing of individual reflections is discussed. Some case studies are given. The use of SR is speeding up the rate at which protein structures are being determined as well as their accuracy and will allow a more complete molecular anatomy of biological systems to be established.

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Section: F" and F For Pure Elements With 'Unbound' Atoms With Variabl...mentioning

confidence: 99%

Synchrotron X-radiation protein crystallography: instrumentation, methods and applications

Helliwell

1984

Rep. Prog. Phys.

134

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Shift in the Binding Energy of the Inner Electrons Due to Chemical Combination

Srivastava

Husain

Gupta

et al. 1981

Physica Status Solidi (b)

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forward from time to time to account for these shifts. But unfortunately nobody has tried to show how the above qualitative assertion can be correlated with the numerical value of the chemical shift. Therefore, it was thought to be of great interest to correlate the numerical value of the observed chemical shift with the above qualitative assertion of several workers.Recently it has been shown by several workers

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K‐Absorption Spectra of Copper Oxides

Aggarwal¹,

Saxena²

1984

Physica Status Solidi (b)

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The extended fine structure of K-absorption edge of copper in its oxides is studied using a 40 em curved crystal spectrograph. The observed shift of K-edges of copper in the oxides is better explained with MO and SRO theories. Separations apparent between the absorption minima corresponding to copper and oxygen atoms in the lattices of two oxides support the MO viewpoints.Die ausgedehnte Feinstruktur der K-Absorptionskante von Kupfer in seinen Oxiden wird mittels eines 40 cm-Spektrographs mit gekriimmtem Kristall unteraucht. Die beobachtete Verschiebung der K-Kante von Kupfer in den Oxiden wird mit MO-und SRO-Theorien besser erkllrt. Die auftretenden Abstiinde zwischen den Absorptionsminima, die mit Kupfer-und Sauerstoffatomen in den Gittern der beiden Oxide ubereinstimmen, bestatigen den MO-Standpunkt.

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Effects of chemical combination on the X-ray L_IIIabsorption limits of Mo, Rh, Pd, Ag and Cd

Cited by 21 publications

References 17 publications

Synchrotron X-radiation protein crystallography: instrumentation, methods and applications

Synchrotron X-radiation protein crystallography: instrumentation, methods and applications

Shift in the Binding Energy of the Inner Electrons Due to Chemical Combination

K‐Absorption Spectra of Copper Oxides

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Effects of chemical combination on the X-ray LIIIabsorption limits of Mo, Rh, Pd, Ag and Cd

Cited by 21 publications

References 17 publications

Synchrotron X-radiation protein crystallography: instrumentation, methods and applications

Synchrotron X-radiation protein crystallography: instrumentation, methods and applications

Shift in the Binding Energy of the Inner Electrons Due to Chemical Combination

K‐Absorption Spectra of Copper Oxides

Contact Info

Product

Resources

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Effects of chemical combination on the X-ray L_IIIabsorption limits of Mo, Rh, Pd, Ag and Cd