Articles with "ionization" as a keyword



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Modeling polar region atmospheric ionization induced by the giant solar storm on 20 January 2005

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Published in 2017 at "Journal of Geophysical Research"

DOI: 10.1002/2017ja024125

Abstract: Ionization in Earth's troposphere is mainly due to Galactic cosmic rays. Occasionally, solar storms produce intense relativistic ion beams that significantly increase such ionization. One of the largest recorded solar radiation storms, on 20 January… read more here.

Keywords: polar region; atmospheric ionization; modeling polar; january 2005 ... See more keywords
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Effects of the Chodura sheath on tungsten ionization and emission in tokamak divertors

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Published in 2019 at "Contributions To Plasma Physics"

DOI: 10.1002/ctpp.201900140

Abstract: Funding information U.S. Department of Energy, DE-FG02-95ER54309, DE-SC0018423 Abstract The decay of the electric potential in the sheath region in tokamak divertors occurs on a scale length on the order of the main ion gyroradius… read more here.

Keywords: chodura sheath; sheath region; sheath; tokamak divertors ... See more keywords
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Retrospective analysis for valproate screening targets with liquid chromatography-high resolution mass spectrometry with positive electrospray ionization: An omics-based approach.

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Published in 2019 at "Drug testing and analysis"

DOI: 10.1002/dta.2543

Abstract: Liquid chromatography coupled with high-resolution mass spectrometry (LC-HRMS) is an important analytical tool in the systematic toxicological analysis performed in forensic toxicology. However, some important compounds, such as the antiepileptic drug valproate (valproic acid; VPA),… read more here.

Keywords: high resolution; analysis; liquid chromatography; resolution mass ... See more keywords
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Application of capillary electrophoresis‐nano‐electrospray ionization‐mass spectrometry for the determination of N‐nitrosodimethylamine in pharmaceuticals

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Published in 2020 at "ELECTROPHORESIS"

DOI: 10.1002/elps.202000303

Abstract: After a presence of highly hepatotoxic and potentially carcinogenic N‐nitrosodimethylamine was detected in certain lots of sartan, ranitidine, metformin, and other pharmaceuticals, local regulatory authorities issued recalls of suspected products, and concerns of the pharmacotherapy… read more here.

Keywords: capillary electrophoresis; determination; nitrosodimethylamine; application capillary ... See more keywords
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Electron ionization mass spectrometry: Quo vadis?

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Published in 2022 at "ELECTROPHORESIS"

DOI: 10.1002/elps.202100392

Abstract: Mass spectrometry (MS) is a fundamental technique to identify compounds by their mass‐to‐charge ratio. It is known that MS can only detect target compounds when they are converted to ions in the gas phase. The… read more here.

Keywords: mass spectrometry; ionization; technique; electron ionization ... See more keywords
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Real‐time traceability of sorghum origin by soldering iron‐based rapid evaporative ionization mass spectrometry and chemometrics

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Published in 2022 at "ELECTROPHORESIS"

DOI: 10.1002/elps.202200043

Abstract: Sorghum is an important grain with a high economic value for liquor production. Tracing the geographical origin of sorghum is vital to guarantee the liquor flavor. Soldering iron‐based rapid evaporative ionization mass spectrometry (REIMS) combined… read more here.

Keywords: soldering iron; ionization; sorghum; real time ... See more keywords
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Differential Organic Contaminant Ionization Source Detection and Identification in Environmental Waters by Non-Targeted Analysis.

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Published in 2021 at "Environmental toxicology and chemistry"

DOI: 10.1002/etc.5268

Abstract: The development of non-targeted analysis (NTA) methods to assess environmental contaminants of emerging concern, which are not commonly monitored, is paramount, especially when no previous knowledge on the identity of the pollution source is available.… read more here.

Keywords: non targeted; ionization; source; detection identification ... See more keywords
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Fitting continuum wavefunctions with complex Gaussians: Computation of ionization cross sections

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Published in 2020 at "Journal of Computational Chemistry"

DOI: 10.1002/jcc.26396

Abstract: We implement a full nonlinear optimization method to fit continuum states with complex Gaussians. The application to a set of regular scattering Coulomb functions allows us to validate the numerical feasibility, to explore the range… read more here.

Keywords: continuum wavefunctions; cross sections; complex gaussians; ionization ... See more keywords
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Density functional theory and CCSD(T) evaluation of ionization potentials, redox potentials, and bond energies related to zirconocene polymerization catalysts

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Published in 2022 at "Journal of Computational Chemistry"

DOI: 10.1002/jcc.26890

Abstract: Quantum‐mechanical‐based computational design of molecular catalysts requires accurate and fast electronic structure calculations to determine and predict properties of transition‐metal complexes. For Zr‐based molecular complexes related to polyethylene catalysis, previous evaluation of density functional theory… read more here.

Keywords: evaluation; ionization; functional theory; redox potentials ... See more keywords
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The polarity effect of compact ionization chambers used for small field dosimetry

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Published in 2018 at "Medical Physics"

DOI: 10.1002/mp.13227

Abstract: PURPOSE The recent developments of compact air-filled ionization chambers for use in small photon beams have raised the needs to address the associated polarity effect. The polarity effect of five compact ionization chambers has been… read more here.

Keywords: effect; polarity effect; polarity; small field ... See more keywords
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AAPM WGTG51 Report 374: Guidance for TG-51 reference dosimetry.

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Published in 2022 at "Medical physics"

DOI: 10.1002/mp.15949

Abstract: Practical guidelines that are not explicit in the TG-51 protocol and its Addendum for photon beam dosimetry are presented for the implementation of the TG-51 protocol for reference dosimetry of external high-energy photon and electron… read more here.

Keywords: reference dosimetry; aapm wgtg51; ionization; reference ... See more keywords