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You searched on: Author: Bruce Ravel

Displaying records 1 to 10 of 25 records.
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1. XAFS Data Interchange: A single spectrum XAFS data file format
Published: 6/9/2016
Authors: Bruce D Ravel, M. Newville
Abstract: We propose a standard data format for the interchange of XAFS data. The XAFS Data Interchange (XDI) standard is meant to encapsulate a single spectrum of XAFS along with relevant metadata. XDI is a text-based format with a simple syntax which clearly ...

2. Quantitative EXAFS Analysis
Published: 2/1/2016
Author: Bruce D Ravel

3. Abiotic bromination of soil organic matter
Published: 10/15/2015
Authors: Bruce D Ravel, Alessandra C Leri
Abstract: Biogeochemical transformations of plant-derived soil organic matter (SOM) involve complex abiotic and microbially mediated reactions. One such reaction is halogenation, which occurs naturally in the soil environment and has been associated with enzym ...

4. Understanding the blue color in antique mosaic mirrored glass from the Temple of the Emerald Buddha, Thailand
Published: 2/4/2015
Authors: Bruce D Ravel, Wantana Klysubun, Christoph Hauzenberger, Prapong Klysubun, Yuying Huang, Weeraya Wongtepa, Panidtha Sombunchoo
Abstract: Two samples of the blue glass produced in the middle 19th century from the Temple of the Emerald Buddha in Bangkok, Thailand, were studied in order to understand the origin of its blue color. The oxide components and trace elements are quantitatively ...

5. Path degeneracy and EXAFS analysis of disordered materials
Published: 10/24/2014
Author: Bruce D Ravel
Abstract: The analysis of EXAFS data measured on a material with a disordered local configuration environment around the absorbing atom can be challenging due to the proliferation of photoelectron scattering paths that must be considered in the analysis. In th ...

6. Bromination of marine particulate organic matter through oxidative mechanisms
Published: 9/14/2014
Authors: Bruce D Ravel, Alessandra C Leri, Kathleen Thornton, Lawrence M Mayer
Abstract: Although bromine is considered conservative in seawater, it exhibits a well established correlation with organic carbon in marine sediments. This carbon-bromine association was recently attributed to covalent bonding, with organobromine in sinking pa ...

7. The red color in 19th century Thai glass studied by X-ray and optical spectroscopy
Published: 7/2/2014
Authors: Bruce D Ravel, Wantana Klysubun, G. Lawrence Carr, Christoph Hauzenberger
Abstract: The Temple of the Emerald Buddha in Bangkok, Thailand is noted for its glass mosaic decorations on exterior walls and statuary. The original mosaic artwork dates to the early 19th century and is composed of variously-colored, mirrored glass pieces. I ...

8. National Synchrotron Light Source II: Long Islands state-of-the-art X-ray microscope
Published: 5/20/2014
Authors: Bruce D Ravel, Scott Calvin, Linnea Russell
Abstract: This is an education and outreach effort that we have undertaken for the benefit of the Photon Sciences Users' Executive Committee. The UEC is the group that represents the user of the National Synchrotron Light Source, which is currently in its fina ...

9. Sample Thickness and Quantitative Concentration Measurements in XANES Spectroscopy
Published: 5/16/2014
Authors: Alessandra C Leri, Bruce D Ravel
Abstract: While XANES spectroscopy is an established tool for quantitative information on chemical structure and speciation, elemental concentrations are generally quantified by other methods. The edge step in XANES spectra represents the absolute amount of t ...

10. X-ray Absorption Study of Structural Coupling in Photomagnetic Prussian Blue Analogue Core@Shell Particles
Published: 4/22/2014
Authors: Daniel M Pajerowski, Bruce D Ravel, Carissa H. Li, Matthieu F. Dumont, Daniel R. Talham
Abstract: X-ray absorption spectroscopy experiments of core@shell, photomagnetic, Prussian blue analogue heterostructures obtain local structure around the magnetic, transition metal ions before and after illumination. Two samples, containing nickel hexacyanoc ...

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