Results 41 to 50 of about 506,032 (344)

Ambient Pressure Laser Desorption—Chemical Ionization Mass Spectrometry for Fast and Reliable Detection of Explosives, Drugs, and Their Precursors

Applied Sciences, 2018
Fast and reliable information is crucial for first responders to draw correct conclusions at crime scenes. An ambient pressure laser desorption (APLD) mass spectrometer is introduced for this scenario, which enables detecting substances on surfaces ...
René Reiss, Sven Ehlert, Jan Heide, Michael Pütz, Thomas Forster, Ralf Zimmermann   +5 more
doaj   +1 more source

The Free-Free Opacity in Warm, Dense, and Weakly Ionized Helium

, 2005
We investigate the ionization and the opacity of warm, dense helium under conditions found in the atmospheres of cool white dwarf stars. Our particular interest is in densities up to $\rm 3 g/cm^{3}$ and temperatures from 1000K to 10000K.
Kowalski, P. M., Mazevet, S., Saumon, D.
core   +2 more sources

The Chemical and Ionization Conditions in Weak Mg II Absorbers [PDF]

, 2008
We present an analysis of the chemical and ionization conditions in a sample of 100 weak Mg II absorbers identified in the VLT/UVES archive of quasar spectra.
Anand Narayanan, Bergeron J., Churchill C. W. C., Grevesse N., Jane C. Charlton, Rebecca E. Green, Tae‐Sun Kim, Toru Misawa   +7 more
core   +3 more sources

The charging of neutral dimethylamine and dimethylamine–sulfuric acid clusters using protonated acetone [PDF]

Atmospheric Measurement Techniques, 2015
Sulfuric acid is generally considered one of the most important substances taking part in atmospheric particle formation. However, in typical atmospheric conditions in the lower troposphere, sulfuric acid and water alone are unable to form particles.
K. Ruusuvuori, P. Hietala, O. Kupiainen-Määttä, T. Jokinen, H. Junninen, M. Sipilä, T. Kurtén, H. Vehkamäki   +7 more
doaj   +1 more source

Evidence of Reactivity in the Membrane for the Unstable Monochloramine during MIMS Analysis

Sensors, 2018
Membrane Inlet Mass Spectrometry (MIMS) was used to analyze monochloramine solutions (NH2Cl) and ammonia solutions in a compact FTICR. Chemical ionization enables identification and quantification of the products present in the permeate. The responses of
Essyllt Louarn, Abdoul. Monem Asri-Idlibi, Julien Leprovost, Michel Héninger, Hélène Mestdagh   +4 more
doaj   +1 more source

Characterizing Volatile Emissions and Combustion Byproducts from Aqueous Film-Forming Foams Using Online Chemical Ionization Mass Spectrometry. [PDF]

Environ Sci Technol
Mattila JM, Krug JD, Roberson WR, Burnette RP, McDonald S, Virtaranta L, Offenberg JH, Linak WP.   +7 more
europepmc   +3 more sources

Assessment of W1 and W2 theories for the computation of electron affinities, ionization potentials, heats of formation, and proton affinities [PDF]

, 2001
The performance of two recent {\em ab initio} computational thermochemistry schemes, W1 and W2 theory [J.M.L. Martin and G. de Oliveira, J. Chem. Phys.
Martin, Jan M. L., Parthiban, S.
core   +2 more sources

Identity of electrons and ionization equilibrium

, 2010
It is perhaps appropriate that, in a year marking the 90th anniversary of Meghnad Saha seminal paper (1920), new developments should call fresh attention to the problem of ionization equilibrium in gases.
Alastuey A., Blakemore J. S., Bobrov V. B., Ebeling W., Gelfer Ya. M., Gorbunov D. S., Gryaznov V. K., Kirzhnits D., Kraeft W.-D., Landau L. D., Landau L. D., Larkin A. I., Larkin A. I., Rogers F. J., S. A. Trigger, Saha M., Silin V. P., Starostin A. N., Trigger S. A., V. B. Bobrov, Vedenov A. A., Vedenov A. A. Larkin A. I., W. Ebeling   +22 more
core   +1 more source

A Consistency Test of Spectroscopic Gravities for Late-Type Stars [PDF]

, 1999
Chemical analyses of late-type stars are usually carried out following the classical recipe: LTE line formation and homogeneous, plane-parallel, flux-constant, and LTE model atmospheres.
Asplund M., Bengt Gustafsson, Bertelli G., Blackwell D. E., Bonnell J. T., Carlos Allende Prieto, Castelli F., David L. Lambert, Edvardsson B., Edvardsson B., Fuhrmann K., Fuhrmann K., Fuhrmann K., Fuhrmann K., Gratton R. G., Gustafsson B., Magain P., Magain P., Magain P., Magain P., Magain P., Nissen P. E., Perryman M. A. C., Ramon J. Garcia Lopez, Reid I. N., Steffen M., Unwin S. C., Vandenberg D. A., Van’t Veer-Menneret C.   +28 more
core   +2 more sources

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source