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Topic Area: Spectroscopy

Displaying records 1 to 10 of 106 records.
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1. 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 ...

2. 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 ...

3. 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 ...

4. 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 ...

5. 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 ...

6. To Predict Vibrational Spectra, Are Anharmonic Calculations Worthwhile?
Topic: Spectroscopy
Published: 1/22/2013
Authors: Ruth Lafuente Jacobsen, Karl K Irikura, Russell D Johnson III, Raghu N Kacker
Abstract: Anharmonic calculations using vibrational perturbation theory are known to provide near-spectroscopic accuracy when combined with high-level ab initio potential energy functions. However, performance with economical, popular electronic structure meth ...

7. Controlling Thermochromism in a Photonic Block Copolymer Gel
Topic: Spectroscopy
Published: 9/26/2012
Authors: Joseph J Walish, Yin Fan , Andrea Centrone, Edwin L. Thomas
Abstract: Controlling the color via temperature-induced changes of self-assembled photonic materials is important for their application in sensors and displays. The thermochromic behavior of a PS-P2VP photonic gel was studied (UV-VIS, FTIR) and found to origin ...

8. Measurement of H2O-Broadening of O2 A-band Transitions and Implications for Atmospheric Remote Sensing
Topic: Spectroscopy
Published: 3/27/2012
Authors: E. M. Vess, C. J. Wallace, H. M. Campbell, V. E. Awadalla, Joseph Terence Hodges, David A Long, D. K. Havey
Abstract: We present laboratory measurements of H2O-broadened 16O2 A-band ( ) absorption spectra acquired with a laser-based photoacoustic spectroscopy method. This absorption band is widely used in a variety of high-precision atmospheric remote sensing appli ...

9. Predictive Gold Nanocluster Formation Controlled by Metal-Ligand Complexes
Topic: Spectroscopy
Published: 1/9/2012
Authors: John M Pettibone, Jeffrey W Hudgens
Abstract: The formation of ligand-protected transition metal nanoclusters in size-selective syntheses is driven by the inherent properties of the protecting ligands. We have previously reported the selective, monodisperse product formation of phosphine protect ...

10. Charaterization of Standard Reference Material 2943, Cu-Ion-Doped Glass, Spectral Correction Standard for Blue Fluorescence
Topic: Spectroscopy
Published: 12/1/2011
Authors: Paul C DeRose, Melody V Smith, Klaus Mielenz, Jeffrey R. Anderson, Gary W Kramer
Abstract: Standard Reference Material (SRM) 2943 is a cuvette-shaped, Cu0ion-doped glass, recommended for use for relative spectral correction of emission and day-to-day performance verification of steady-state florescence spectrometers. Properties of this st ...

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