Search results for: Jason Duncan

Items from 1 to 9 out of 9 results

article

Overview of the DARPA LORELEI Program

Caitlin Christianson, Jason Duncan, Boyan Onyshkevych

Machine Translation > 2018 > 32 > 1-2 > 3-9

The initial impetus for the establishment of the Low Resource Human Language Technology (LoReHLT) evaluation was for LoReHLT to serve as a program evaluation for the Defense Advanced Research Projects Agency (DARPA) Low Resource Languages for Emergent Incidents (LORELEI) research program. As evaluation planning developed, however, NIST and DARPA decided to open the program evaluation to the rest of...

article

Experimental Characterization of Secular Frequency Scanning in Ion Trap Mass Spectrometers

Dalton T. Snyder, Christopher J. Pulliam, Joshua S. Wiley, Jason Duncan, more

Journal of The American Society for Mass Spectrometry > 2016 > 27 > 7 > 1243-1255

Secular frequency scanning is implemented and characterized using both a benchtop linear ion trap and a miniature rectilinear ion trap mass spectrometer. Separation of tetraalkylammonium ions and those from a mass calibration mixture and from a pesticide mixture is demonstrated with peak widths approaching unit resolution for optimized conditions using the benchtop ion trap. The effects on the spectra...

article

Endogenous Retinoic Acid Required to Maintain the Epidermis Following Ultraviolet Light Exposure in SKH‐1 Hairless Mice

Katherine L. Gressel, F. Jason Duncan, Tatiana M. Oberyszyn, Krista M. La Perle, more

Photochemistry and Photobiology > 91 > 4 > 901 - 908

Ultraviolet light B (UVB) exposure induces cutaneous squamous cell carcinoma (cSCC), one of the most prevalent human cancers. Reoccurrence of cSCC in high‐risk patients is prevented by oral retinoids. But oral retinoid treatment causes significant side effects; and patients develop retinoid resistance. Exactly how retinoids prevent UVB‐induced cSCC is currently not well understood. Retinoid resistance...

article

Correction of broad molecular impairments in a mouse model of MPS IIIA by systemic rAAVrh74-hSGSH gene delivery

Haiyan Fu, F. Jason Duncan, Bartholomew Naughton, Kimberly Zaraspe, more

Molecular Genetics and Metabolism > 2014 > 111 > 2 > S44

article

Performance of a low voltage ion trap

Paul Hendricks, Jason Duncan, Robert J. Noll, Zheng Ouyang, more

International Journal of Mass Spectrometry > 2011 > 305 > 1 > 69-73

Reduced power operation of a mass analyzer with minimum loss of spectral resolution and mass range is desirable in portable instruments. Miniaturizing quadrupole-based ion traps can be especially worthwhile since the RF amplitude necessary for mass analysis scales with the square of the analyzer dimensions. The performance of a miniature, stainless steel, rectilinear ion trap (RIT) with dimensions...

article

Direct Detection of Benzene, Toluene, and Ethylbenzene at Trace Levels in Ambient Air by Atmospheric Pressure Chemical Ionization Using a Handheld Mass Spectrometer

Guangming Huang, Liang Gao, Jason Duncan, Jason D. Harper, more

Journal of the American Society for Mass Spectrometry > 2010 > 21 > 1 > 132-135

The capabilities of a portable mass spectrometer for real-time monitoring of trace levels of benzene, toluene, and ethylbenzene in air are illustrated. An atmospheric pressure interface was built to implement atmospheric pressure chemical ionization for direct analysis of gas-phase samples on a previously described miniature mass spectrometer (Gao et al. Anal. Chem. 2006, 78, 5994–6002). Linear dynamic...

article

Direct detection of benzene, toluene, and ethylbenzene at trace levels in ambient air by atmospheric pressure chemical ionization using a handheld mass spectrometer

Guangming Huang, Liang Gao, Jason Duncan, Jason D. Harper, more

Journal of The American Society for Mass Spectrometry > 2010 > 21 > 1 > 132-135

The capabilities of a portable mass spectrometer for real-time monitoring of trace levels of benzene, toluene, and ethylbenzene in air are illustrated. An atmospheric pressure interface was built to implement atmospheric pressure chemical ionization for direct analysis of gas-phase samples on a previously described miniature mass spectrometer (Gao et al. Anal. Chem. 2006, 78, 5994–6002). Linear dynamic...

article

Characterization of a discontinuous atmospheric pressure interface. Multiple ion introduction pulses for improved performance

Liang Gao, Guangtao Li, Zongxiu Nie, Jason Duncan, more

International Journal of Mass Spectrometry > 2009 > 283 > 1-3 > 30-34

Discontinuous atmospheric pressure interfaces (DAPI) are used to match the rate of sample introduction to the pumping capacity of miniature mass spectrometers. In this study, the influence of the interface flow conductance and the mass spectrometer pumping speed on ion introduction into a handheld mass spectrometer is investigated. Results show that an intermediate flow conductance (2.6×10 ⁻³...

article

Progress in gene therapy for Duchenne muscular dystrophy

Paula R. Clemens, F Jason Duncan

Current Neurology and Neuroscience Reports > 2001 > 1 > 1 > 89-96

Gene transfer research for Duchenne muscular dystrophy (DMD) has brought the goal of successful treatment of this devastating, inherited disease closer to being a reality. Although gene therapeutic approaches for DMD patients are not yet in clinical use, recent advances using DMD animal models are encouraging. Progress in vector design, such as high-capacity adenoviral vectors, targeted adenoviral...

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Keywords

MINIATURE MASS SPECTROMETER (2)
QUADRUPOLE ION TRAP (2)
AMBIENT IONIZATION (1)
ATMOSPHERIC PRESSURE INTERFACE (1)
COLLISION-INDUCED DISSOCIATION (1)
DISASTER RELIEF (1)
DISCONTINUOUS ATMOSPHERIC PRESSURE INTERFACE (DAPI) (1)
DISCONTINUOUS SAMPLE INTRODUCTION (1)
EXTERNAL ION GENERATION (1)
HIGHER ORDER FIELDS (1)
HUMANITARIAN ASSISTANCE (1)
IN SITU ANALYSIS (1)
ION EJECTION (1)
ION MOTION (1)
MACHINE TRANSLATION (1)
MASS ANALYZER (1)
MINIATURE ION TRAP (1)
NATURAL LANGUAGE PROCESSING (1)
PORTABLE INSTRUMENTATION (1)
PORTABLE MASS SPECTROMETRY (1)
RECTILINEAR ION TRAP (1)
SIMULATIONS (1)
TANDEM MASS SPECTROMETRY (1)
TANDEM MS (1)
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Elsevier (4)
Springer (4)
Wiley (1)

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Search results for: Jason Duncan

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