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Topic Area: Spectroscopy
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Displaying records 1 to 10 of 114 records.
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1. Path degeneracy and EXAFS analysis of disordered materials
Topic: Spectroscopy
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 ...

2. Bromination of marine particulate organic matter through oxidative mechanisms
Topic: Spectroscopy
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 ...

3. High-Speed Coherent Raman Fingerprint Imaging of Biological Tissues
Topic: Spectroscopy
Published: 7/20/2014
Authors: Charles H Camp, Young Jong Lee, John Heddleston, Christopher Michael Hartshorn, Angela R Hight Walker, Jeremy N. Rich, Justin D. Lathia, Marcus T Cicerone
Abstract: We have developed a coherent Raman imaging platform using broadband coherent anti-Stokes Raman scattering (BCARS) that provides an unprecedented combination of speed, sensitivity, and spectral breadth. The system utilizes a unique configuration of la ...

4. Plasmonic nanodome array fabricated on plastic as a dual-mode surface plasmon resonance and surface- enhanced Raman scattering sensor
Topic: Spectroscopy
Published: 5/12/2014
Authors: Charles J. Choi, Stephen Semancik
Abstract: Label-free optical sensors have recently emerged as a highly sensitive approach for detecting a broad range of chemical and biological analytes that include illicit drug compounds, explosives, proteins, viruses, and bacteria.To best meet such div ...

5. N-methylmesoporphyrin IX fluorescence as a reporter of strand orientation in guanine quadruplexes
Topic: Spectroscopy
Published: 4/1/2014
Authors: Navin C. Sabharwal, Victoria Savikhin, Joshua Turek-Herman, John M. Nicoludis, Veronika A Szalai, Liliya Yatsunyk
Abstract: Guanine quadruplexes (GQ) are four-stranded DNA structures formed by guanine-rich DNA sequences. Formation of GQs inhibits cancer cell survival, but detecting GQs in vivo has proved difficult, in part because of GQ structural diversity. Development ...

6. Improved Normalization of Systematic Biases Affecting Ion Current Measurements in Label-free Proteomics Data
Topic: Spectroscopy
Published: 2/21/2014
Authors: Paul A Rudnick, Xinjian Yan, Stephen E Stein, Xia Wang, Nell Sedransk
Abstract: Systematic biases, or batch effects, in ,high-throughput‰ biological datasets can be described as obscuring variabilities introduced during experimental design or analytical processing. These biases, if left unresolved, can lead to misinterpreta ...

7. Probing the intracellular glutathione redox potential using in-cell NMR spectroscopy
Topic: Spectroscopy
Published: 1/2/2014
Authors: Steve Y. Rhieu, Aaron A Urbas, Daniel W Bearden, John P Marino, Vytautas Reipa, Katrice A Lippa
Abstract: Non-invasive and real-time analysis of cellular redox processes has been greatly hampered by lack of suitable measurement techniques. Here we describe an in-cell nuclear magnetic resonance (NMR)-based method for measuring the intracellular glutathion ...

8. Determination of Arsenic in Food and Dietary Supplement Standard Reference Materials by Neutron Activation Analysis
Topic: Spectroscopy
Published: 9/1/2013
Author: Rick L Paul
Abstract: Arsenic has been measured in food and food supplement Standard Reference Materials by neutron activation analysis for the purpose of value-assigning As mass fractions and assessing homogeneity. Instrumental neutron activation analysis (INAA) has been ...

9. Frequency-agile, rapid scanning spectroscopy
Topic: Spectroscopy
Published: 4/28/2013
Authors: Gar-Wing Truong, Kevin O Douglass, Stephen E Maxwell, Roger D van Zee, David F Plusquellic, Joseph Terence Hodges, David A Long
Abstract: Challenging applications in trace gas analyses require high precision and acquisition rates.1-4 Many continuous-wave laser spectroscopy techniques exhibit significant sensitivity and potential;5 however, their scanning rates are slow because they rel ...

10. The Detection of Interstellar Ethanimine (CH3CHNH) from Observations taken during the GBT PRIMOS Survey
Topic: Spectroscopy
Published: 2/13/2013
Authors: Francis John Lovas, Ryan A. Loomis, Daniel P. Zaleski, Amanda L. Steber, Justin L. Neill, Matthew T. Muckle, Brent J. Harris, Jan M. Hollis, Phillip R. Jewell, Valerio Lattanzi, Oscar Martines, Michael C. McCarthy, Anthony J. Remijan, Brooks H. Pate
Abstract: As the availab¬¬ility of publicly accessible spectral line surveys from radio astronomy increases, new approaches to the identification of molecules in the interstellar medium are possible. We have performed reaction product screening measurements u ...

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