David H. Powell
University of Florida
51 Papers
1K Citations
David H. Powell is an academic researcher from University of Florida. The author has contributed to research in topics: Mass spectrometry & Fourier transform ion cyclotron resonance. The author has an hindex of 27, co-authored 51 publications. Previous affiliations of David H. Powell include University of Michigan & Harvard University.
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Papers
The missing organic molecules on Mars.
TL;DR: Experiments show that one of these, benzenehexacarboxylic acid (mellitic acid), is generated by oxidation of organic matter known to come to Mars, is rather stable to further oxidation, and would not have been easily detected by the Viking experiments.
Regiosymmetric Dibutyl-Substituted Poly(3,4-propylenedioxythiophene)s as Highly Electron-Rich Electroactive and Luminescent Polymers
Dean M. Welsh,Leroy J. Kloeppner,Luis Madrigal,Mauricio R. Pinto,Barry C. Thompson,Kirk S. Schanze,Khalil A. Abboud,David H. Powell,John R. Reynolds +8 more
TL;DR: In this article, the synthesis of the dibutyl derivative of poly(3,4-propylenedioxythiophene) as a regiosymmetric and soluble electroactive and photoluminescent conjugated polymer obtained in the neutral form by a Grignard metathesis coupling reaction was reported.
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In vivo neurochemical monitoring by microdialysis and capillary separations.
Robert T. Kennedy,Christopher J. Watson,Christopher J. Watson,William E. Haskins,William E. Haskins,David H. Powell,David H. Powell,Robert E. Strecker +7 more
TL;DR: Recent advances include the application of the high-sensitivity methods of capillary electrophoresis and capillary liquid chromatography with mass spectrometry to dialysate analysis, which have improved temporal resolution, spatial resolution, multi-analyte capability and potential for compound discovery.
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Aptamer-Conjugated Multifunctional Nanoflowers as a Platform for Targeting, Capture, and Detection in Laser Desorption Ionization Mass Spectrometry
Ismail Ocsoy,Basri Gulbakan,Mohammed Ibrahim Shukoor,Xiangling Xiong,Xiangling Xiong,Tao Chen,David H. Powell,Weihong Tan,Weihong Tan +8 more
TL;DR: In one system, the use of gold manganese oxide (Au@MnO) hybrid nanoflowers can act as an ionization substrate for mass spectrometry, target cancer cells, and detect and analyze metabolites from cancer cells.
Proton Affinities of Eight Matrices Used for Matrix‐assisted Laser Desorption/Ionization
Richard D. Burton,Clifford H. Watson,John R. Eyler,G. Lisa Lang,David H. Powell,Marcella Y. Avery +5 more
TL;DR: In this article, the ground-state proton affinity of eight common matrix-assisted laser desorption/ionization (MALDI) matrices was determined. And the [M'+'H]+ ion was generated by methane chemical ionization, trapped and isolated in a Fourier transform ion cyclotron resonance mass spectrometer, allowed to cool for 5 s and reacted with reference compounds of known proton affinities.
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