Results 31 to 40 of about 506,032 (344)

The Interaction Between Accretion from the Interstellar Medium and Accretion from the Evolved Binary Component in Barium Stars [PDF]

Journal of Astronomy and Space Sciences, 2018
The reanalysis of the previously published abundance pattern of mild barium star HD202109 (ζ Cyg) and the chemical compositions of 129 thin disk barium stars facilitated the search for possible correlations of different stellar parameters with second ...
Yeuncheol Jeong, Alexander V. Yushchenko, Dmytry N. Doikov   +2 more
doaj   +1 more source

Ionization Front Instabilities in Primordial H II Regions [PDF]

, 2007
Radiative cooling by metals in shocked gas mediates the formation of ionization front instabilities in the galaxy today that are responsible for a variety of phenomena in the interstellar medium, from the morphologies of nebulae to triggered star ...
Norman, Michael L., Whalen, Daniel
core   +1 more source

Modeling Pressure-Ionization of Hydrogen in the Context of Astrophysics [PDF]

, 1999
The recent development of techniques for laser-driven shock compression of hydrogen has opened the door to the experimental determination of its behavior under conditions characteristic of stellar and planetary interiors.
Celliers P. M., Collins G. W., D. J. Wagner, D. Saumon, G. Chabrier, Guillot T., X. Xie   +6 more
core   +3 more sources

Compact FTICR Mass Spectrometry for Real Time Monitoring of Volatile Organic Compounds

Sensors, 2018
In this paper, we present a compact Fourier transform ion cyclotron resonance mass spectrometer (FTICR-MS) designed for real time analysis of volatile organic compounds (VOCs) in air or in water. The spectrometer is based on a structured permanent magnet
Joël Lemaire, Sébastien Thomas, Allan Lopes, Essyllt Louarn, Hélène Mestdagh, Hubert Latappy, Julien Leprovost, Michel Heninger   +7 more
doaj   +1 more source

High-frequency gaseous and particulate chemical characterization using extractive electrospray ionization mass spectrometry (Dual-Phase-EESI-TOF) [PDF]

Atmospheric Measurement Techniques, 2022
To elucidate the sources and chemical reaction pathways of organic vapors and particulate matter in the ambient atmosphere, real-time detection of both the gas and particle phase is needed.
C. P. Lee, M. Surdu, D. M. Bell, J. Dommen, M. Xiao, X. Zhou, A. Baccarini, A. Baccarini, S. Giannoukos, S. Giannoukos, G. Wehrle, P. A. Schneider, A. S. H. Prevot, J. G. Slowik, H. Lamkaddam, D. Wang, U. Baltensperger, I. El Haddad   +17 more
doaj   +1 more source

Chromatographic Techniques in the Research Area of Lithium Ion Batteries: Current State-of-the-Art

Separations, 2019
Lithium ion batteries (LIBs) are widely used in numerous application areas, including portable consumer electronics, medicine, grid storage, electric vehicles and hybrid electric vehicles.
Yannick Philipp Stenzel, Fabian Horsthemke, Martin Winter, Sascha Nowak   +3 more
doaj   +1 more source

Influence of fluctuation velocity on the electric conductivity of hydrocarbon flames

Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2016
The feasibility of using ionization sensor for the investigation and diagnosis of the fuel combustion process in piston power plants with spark ignition is substantiated.
A. P. Shajkin, I. R. Galiev, A. V. Bobrovsky   +2 more
doaj   +1 more source

Multi-scheme chemical ionization inlet (MION) for fast switching of reagent ion chemistry in atmospheric pressure chemical ionization mass spectrometry (CIMS) applications [PDF]

Atmospheric Measurement Techniques, 2019
A novel chemical ionization inlet named the Multi-scheme chemical IONization inlet (MION), Karsa Ltd., Helsinki, Finland) capable of fast switching between multiple reagent ion schemes is presented, and its performance is demonstrated by measuring ...
M. P. Rissanen, M. P. Rissanen, J. Mikkilä, S. Iyer, S. Iyer, J. Hakala   +5 more
doaj   +1 more source

Cosmic-ray ionization of molecular clouds

, 2009
Low-energy cosmic rays are a fundamental source of ionization for molecular clouds, influencing their chemical, thermal and dynamical evolution. The purpose of this work is to explore the possibility that a low-energy component of cosmic-rays, not ...
A. E. Glassgold, Afrosimov, Anders, Bergin, Bergin, Bethe, Black, Black, Butner, Casadei, Caselli, Cecchi-Pestellini, Cesarski, Chandran, Colgan, Cravens, Cravens, Curran, D. Galli, Dalgarno, Dalgarno, de Boisanger, de Heer, Doty, DuBois, Edwards, Federman, Geballe, Gilbody, Glassgold, Glassgold, Glassgold, Hartquist, Hartquist, Hayakawa, Heiles, Hezareh, Hooper, Indriolo, Indriolo, Kim, Kossmann, Krishnakumar, Krolik, Leung, Liu, M. Padovani, Maret, McCall, McCall, McClure, McKee, Mewaldt, Montague, Moskalenko, Mott, Nakano, Nath, Phelps, Pindzola, Pivovar, Puckett, Ramaty, Ramaty, Rapp, Rapp, Rudd, Rudd, Rudd, Shah, Shah, Shaw, Silk, Skilling, Spitzer, Straub, Strong, Takayanagi, Toburen, Umebayashi, Umebayashi, van der Tak, van der Tak, van Dishoeck, Van Zyl, Wakelam, Webber, Webber, Welsh, Williams   +89 more
core   +2 more sources

The early days of chemical ionization: A reminiscence [PDF]

Journal of the American Society for Mass Spectrometry, 1990
A narrative account is given of the events leading to the discovery of chemical ionization in the laboratories of the Humble Oil and Refining Company in 1965. The discovery was unplanned in the sense that it resulted from the observation of unanticipated phenomena made In the course of experiments undertaken for a different purpose.
openaire   +2 more sources