Results 21 to 30 of about 27,664 (259)

Measurement of atmospheric sesquiterpenes by proton transfer reaction-mass spectrometry (PTR-MS) [PDF]

Atmospheric Measurement Techniques, 2009
The ability to measure sesquiterpenes (SQT; C₁₅H₂₄) by a Proton-Transfer-Reaction Mass Spectrometer (PTR-MS) was investigated.
A. Guenther, R. Daly, R. Rasmussen, D. Helmig, T. Karl, S. Kim   +5 more
doaj  

Airborne measurements of particulate organic matter by proton-transfer-reaction mass spectrometry (PTR-MS): a pilot study [PDF]

Atmospheric Measurement Techniques, 2019
Herein we report on the first successful airborne deployment of the CHemical Analysis of AeRosol ONline (CHARON) particle inlet which allowed us to measure the chemical composition of atmospheric submicrometer particles in real time using a state-of-the ...
F. Piel, F. Piel, M. Müller, T. Mikoviny, S. E. Pusede, A. Wisthaler, A. Wisthaler   +6 more
doaj   +1 more source

A method for the identification of COVID-19 biomarkers in human breath using Proton Transfer Reaction Time-of-Flight Mass Spectrometry

EClinicalMedicine, 2021
Background: COVID-19 has caused a worldwide pandemic, making the early detection of the virus crucial. We present an approach for the determination of COVID-19 infection based on breath analysis. Methods: A high sensitivity mass spectrometer was combined
Aikaterini Liangou, MSc, Antonios Tasoglou, PhD, Heinz J. Huber, PhD, Christopher Wistrom, DO, Kevin Brody, MD, Prahlad G Menon, PhD, Thomas Bebekoski, MD, Kevin Menschel, DO, Marlise Davidson-Fiedler, MD, Karl DeMarco, MD, Harshad Salphale, Jonathan Wistrom, Skyler Wistrom, Richard J. Lee, PhD   +13 more
doaj   +1 more source

The Power of Online Proton Transfer Reaction - Mass Spectrometry (PTR-MS) Measurement of Odorous Emissions from a Pig House

Chemical Engineering Transactions, 2014
Online monitoring of odorous compounds in the ventilation air was applied in an experimental pig house in Denmark. The measurements were executed by proton-transfer-reaction – mass spectrometry (PTR-MS) while grab samples are used to confirm the identity
K. Van Huffel, M. Hansen, A. Feilberg, D. Liu, H. Van Langenhove   +4 more
doaj   +1 more source

GLOVOCS - Master compound assignment guide for proton transfer reaction mass spectrometry users

Atmospheric Environment, 2021
Altres ajuts: AMYS acknowledges the Spanish Ministry of Education and Science for her Juan de la Cierva-Incorporación grant. CW acknowledges the ERC consolidator grant VOCO2 (647008) The richness of measurements obtained by Proton-Transfer Reactions Mass Spectrometry (PTR-MS) has opened a new paradigm for the quantification of volatile organic ...
Yanez-Serrano A. M., Filella I., LLusia J., Gargallo-Garriga A., Granda V., Bourtsoukidis E., Williams J., Seco R., Cappellin L., Werner C., de Gouw J., Penuelas J.   +11 more
openaire   +5 more sources

V-shaped ion funnel proton transfer reaction mass spectrometry

Instrumentation Science & Technology, 2019
A V-shaped ion funnel (IF) drift tube was developed for proton transfer reaction mass spectrometry (PTR-MS). The ion transmissions were characterized at variable radio frequency voltages and frequencies to obtain optimized conditions while considering the effects of radial-focusing, reaction rate, and collision-induced dissociation. The improvements in
Wang, Yujie, Dong, Kexiu, Chu, Yannan
openaire   +1 more source

Rapid "breath-print" of liver cirrhosis by proton transfer reaction time-of-flight mass spectrometry. A pilot study.

PLoS ONE, 2013
UnlabelledThe aim of the present work was to test the potential of Proton Transfer Reaction Time-of-Flight Mass Spectrometry (PTR-ToF-MS) in the diagnosis of liver cirrhosis and the assessment of disease severity by direct analysis of exhaled breath ...
Filomena Morisco, Eugenio Aprea, Vincenzo Lembo, Vincenzo Fogliano, Paola Vitaglione, Giovanna Mazzone, Luca Cappellin, Flavia Gasperi, Stefania Masone, Giovanni Domenico De Palma, Riccardo Marmo, Nicola Caporaso, Franco Biasioli   +12 more
doaj   +1 more source

Conserved structural motifs in PAS, LOV, and CRY proteins regulate circadian rhythms and are therapeutic targets

FEBS Letters, EarlyView.
Cryptochrome and PAS/LOV proteins play intricate roles in circadian clocks where they act as both sensors and mediators of protein–protein interactions. Their ubiquitous presence in signaling networks has positioned them as targets for small‐molecule therapeutics. This review provides a structural introduction to these protein families.
Eric D. Brinckman, Anna E. Lester, Brian D. Zoltowski   +2 more
wiley   +1 more source

Characterization of gas-phase organics using proton transfer reaction time-of-flight mass spectrometry: fresh and aged residential wood combustion emissions [PDF]

Atmospheric Chemistry and Physics, 2017
Organic gases emitted during the flaming phase of residential wood combustion are characterized individually and by functionality using proton transfer reaction time-of-flight mass spectrometry.
E. A. Bruns, J. G. Slowik, I. El Haddad, D. Kilic, F. Klein, J. Dommen, B. Temime-Roussel, N. Marchand, U. Baltensperger, A. S. H. Prévôt   +9 more
doaj   +1 more source

Rapid Tomato Volatile Profiling by Using Proton‐Transfer Reaction Mass Spectrometry (PTR‐MS)

Journal of Food Science, 2012
Abstract:  The availability of rapid and accurate methods to assess fruit flavor is of utmost importance to support quality control especially in the breeding phase. Breeders need more information and analytical tools to facilitate selection for complex multigenic traits such as flavor quality. In this study, it
Farneti, B., Cristescu, S.M., Costa, G., Harren, F.J.M., Woltering, E.J.   +4 more
openaire   +4 more sources