Results 31 to 40 of about 1,320,406 (342)

Contribution of sulfuric acid and oxidized organic compounds to particle formation and growth [PDF]

, 2012
Lack of knowledge about the mechanisms underlying new particle formation and their subsequent growth is one of the main causes for the large uncertainty in estimating the radiative forcing of atmospheric aerosols in global models.
Curtius, Joachim, Ehrhart, Sebastian, A. Kürten, Rondo, L., Ehn, Mikael, Petäjä, Tuukka, E. Weingartner, Weingartner, Ernest, P. Barmet, Riccobono, F., Baltensperger, U., Dommen, Josef, M. Kulmala, F. Riccobono, Barmet, Peter, M. Ehn, Ehrhart, S., U. Baltensperger, Sipilä, Mikko, Kürten, Christoph Andreas, Baltensperger, Urs, Weingartner, E., M. Sipilä, S. Ehrhart, Dommen, J., Barmet, P., Curtius, J., Kuerten, A., J. Curtius, J. Mikkilä, Ehn, M., Kürten, Andreas, Paasonen, Pauli, P. Paasonen, J. Dommen, Rondo, Linda, L. Rondo, Riccobono, Francesco, Mikkilä, Jyri, T. Petäjä, Kulmala, Markku   +40 more
core   +1 more source

The Influence of Alfvén Ionization on Exoplanetary Atmospheres [PDF]

Proceedings of the International Astronomical Union, 2013
AbstractObservations of radio emission from exoplanets and brown dwarfs suggest that such objects harbour atmospheric magnetized plasmas. However, the degree of thermal ionization for such substellar objects is insufficient to qualify the ionized component as a plasma, posing the question: what ionization processes can efficiently produce the required ...
Stark, C.; Helling, C.; Diver, D.
openaire   +1 more source

Antineutrino Oscillations in the Atmospheric Sector [PDF]

, 2011
This thesis presents measurements of the oscillations of muon antineutrinos in the atmospheric sector, where world knowledge of antineutrino oscillations lags well behind the knowledge of neutrinos, as well as a search for νμ \to ν̅ μ transitions ...
Himmel, Alexander I., Alexander I. Himmel   +1 more
core   +1 more source

A Tapered Capillary-Based Contactless Atmospheric Pressure Ionization Mass Spectrometry for On-Line Preconcentration and Separation of Small Organics

Separations, 2021
Capillary electrophoresis (CE) is an effective technique for the separation of different analytes. Moreover, online preconcentration of trace analytes in the capillary for CE analysis has been demonstrated.
Yen-Chun Chen, Arun Krishnamurthy, Szu-Hua Chen, Yu-Chie Chen   +3 more
doaj   +1 more source

Calculation of atmospheric ionization induced by electrons with non-vertical precipitation: Updated model CRAC-EPII

, 2017
In this paper we present a method to compute ionization rates induced by relativistic electron precipitation with arbitrary incidence. Atmospheric ionization for monoenergetic ( > 100 keV) relativistic electron precipitation including explicitly ...
A. Artamonov, I. Mironova, G. Kovaltsov, A. Mishev, Evgenii Plotnikov, N. Konstantinova   +5 more
semanticscholar   +1 more source

Critical Velocity Ionization in Substellar Atmospheres [PDF]

The Astrophysical Journal, 2019
Abstract The observation of radio, X-ray, and H α emission from substellar objects indicates the presence of plasma regions and associated high-energy processes in their surrounding envelopes.
Wilson, A.D., Dobbs-Dixon, I., Diver, D.A., Stark, C.R.   +3 more
openaire   +1 more source

An extractive electrospray ionization time-of-flight mass spectrometer (EESI-TOF) for online measurement of atmospheric aerosol particles

Atmospheric Measurement Techniques, 2019
. Real-time, online measurements of atmospheric organic aerosol (OA) composition are an essential tool for determining the emissions sources and physicochemical processes governing aerosol effects on climate and health.
F. Lopez‐Hilfiker, V. Pospisilova, Wei Huang, M. Kalberer, C. Mohr, Giulia Stefenelli, J. Thornton, U. Baltensperger, A. Prévôt, J. Slowik   +9 more
semanticscholar   +1 more source

Constraining Anthropogenic and Biogenic Emissions using Chemical Ionization Mass Spectrometry [PDF]

, 2011
Numerous gas-phase anthropogenic and biogenic compounds are emitted into the atmosphere. These gases undergo oxidation to form other gas-phase species and particulate matter.
Spencer, Kathleen Marie
core   +1 more source

Applications of ambient ionization mass spectrometry in 2020: An annual review

Analytical Science Advances, 2021
Recent developments in mass spectrometry (MS) analyses have seen a concerted effort to reduce the complexity of analytical workflows through the simplification (or removal) of sample preparation and the shortening of run‐to‐run analysis times.
Stephanie Rankin‐Turner, Liam M. Heaney   +1 more
doaj   +1 more source

Atmospheric pressure thermal desorption chemical ionization mass spectrometry for ultra-sensitive explosive detection

, 2022
Illegal explosives are a threat to aviation, transport sector, critical infrastructure and generally to public safety. Their detection requires extremely sensitive instruments with efficient workflows that allow large throughput of items.
Hemmilä, Verner, Iakovleva, Evgenia, Kangasluoma, Juha, Kausiala, Oskari, Shcherbinin, Aleksei, Juuti, Paxton, Sipilä, Mikko, Jost, H. J., Mikkilä, Jyri, Junninen, Heikki, Jost, H.J., Hakala, Jani   +11 more
core   +1 more source