Results 11 to 20 of about 506,032 (344)
Revisiting benzene cluster cations for the chemical ionization of dimethyl sulfide and select volatile organic compounds [PDF]
Atmospheric Measurement Techniques, 2016 Benzene cluster cations were revisited as a sensitive and selective reagent ion for the chemical ionization of dimethyl sulfide (DMS) and a select group of volatile organic compounds (VOCs).
M. J. Kim +6 more
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A field-deployable, chemical ionization time-of-flight mass spectrometer [PDF]
Atmospheric Measurement Techniques, 2011 We constructed a new chemical ionization time-of-flight mass spectrometer (CI-TOFMS) that measures atmospheric trace gases in real time with high sensitivity.
T. H. Bertram +8 more
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Chemical Effects of Ionizing Radiations [PDF]
Nature, 1948 IN 1944 it was suggested1 that the primary net process in the action of penetrating radiations (γ-rays, X-rays, etc.) on the water molecule consists in its splitting in the following way: which presumably takes place by way of the formation of H2O+ and H2O—.
G, STEIN, J, WEISS
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The Possible Signs of Hydrogen and Helium Accretion from Interstellar Medium on the Atmospheres of F-K Giants in the Local Region of the Galaxy [PDF]
Journal of Astronomy and Space Sciences, 2021 The dependencies of the chemical element abundances in stellar atmospheres with respect to solar abundances on the second ionization potentials of the same elements were investigated using the published stellar abundance patterns for 1,149 G and K ...
Alexander Yushchenko +8 more
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Negative Chemical Ionization of Alcohols [PDF]
Environmental Health Perspectives, 1980 Reactions of the oxygen radical anion at low pressure (ICR conditions) with aliphatic alcohols are seen to give a limited number of product anions which allows for unambiguous determination of the structure of the neutral. The reactions of OH- are also investigated and mechanisms of reactions are discussed.
R, Houriet, D, Stahl, F J, Winkler
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Temperature-dependent sensitivity of iodide chemical ionization mass spectrometers [PDF]
Atmospheric Measurement Techniques, 2022 Iodide chemical ionization mass spectrometry (CIMS) is a common analytical tool used in both laboratory and field experiments to measure a large suite of atmospherically relevant compounds.
M. A. Robinson +9 more
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Ion Sensors for Pulsed and Continuous Detonation Combustors
Chemosensors, 2023 Presented in the article are the design and operation principles of ion sensors intended for detecting the propagating reaction fronts, the deflagration/detonation mode, apparent subsonic/supersonic propagation velocity of the reaction front, and ...
Sergey M. Frolov +4 more
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Fe+ chemical ionization of peptides [PDF]
Journal of the American Society for Mass Spectrometry, 1993 Laser-desorbed peptide neutral molecules were allowed to react with Fe(+) in a Fourier transform mass spectrometer, using the technique of laser desorption/chemical ionization. The Fe(+) ions are formed by laser ablation of a steel target, as well as by dissociative charge-exchange ionization of ferrocene with Ne(+).
Speir, J.Paul +2 more
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Bulletin of the Chemical Society of Ethiopia, 2015 The gas phase ion chemistry of coumarins using electron ionization (EI), positive chemical ionization (PCI) and negative chemical ionization (NCI) in a time of flight and quadrupole mass spectrometer (qMS) coupled to a gas chromatograph is outlined.
K. F. Sichilongo +3 more
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Separations, 2022 In a typical bottom-up proteomics workflow, proteins are enzymatically cleaved, and the resulting peptides are analyzed by HPLC with electrospray ionization (ESI) tandem mass spectrometry. This approach is practical and widely applied.
Simona Sedláčková +4 more
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