Search Results - "Praplan, A."

Effect of ions on sulfuric acid‐water binary particle formation: 2. Experimental data and comparison with QC‐normalized classical nucleation theory by Duplissy, J., Merikanto, J., Franchin, A., Tsagkogeorgas, G., Kangasluoma, J., Wimmer, D., Vuollekoski, H., Schobesberger, S., Lehtipalo, K., Flagan, R. C., Brus, D., Donahue, N. M., Vehkamäki, H., Almeida, J., Amorim, A., Barmet, P., Bianchi, F., Breitenlechner, M., Dunne, E. M., Guida, R., Henschel, H., Junninen, H., Kirkby, J., Kürten, A., Kupc, A., Määttänen, A., Makhmutov, V., Mathot, S., Nieminen, T., Onnela, A., Praplan, A. P., Riccobono, F., Rondo, L., Steiner, G., Tome, A., Walther, H., Baltensperger, U., Carslaw, K. S., Dommen, J., Hansel, A., Petäjä, T., Sipilä, M., Stratmann, F., Vrtala, A., Wagner, P. E., Worsnop, D. R., Curtius, J., Kulmala, M.

“…We report comprehensive, demonstrably contaminant‐free measurements of binary particle formation rates by sulfuric acid and water for neutral and ion‐induced…”
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Aqueous phase processing of secondary organic aerosol from isoprene photooxidation by Liu, Y, Monod, A, Tritscher, T, Praplan, A. P, DeCarlo, P. F, Temime-Roussel, B, Quivet, E, Marchand, N, Dommen, J, Baltensperger, U

“…Transport of reactive air masses into humid and wet areas is highly frequent in the atmosphere, making the study of aqueous phase processing of secondary…”
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OH clock determination by proton transfer reaction mass spectrometry at an environmental chamber by Barmet, P, Dommen, J, DeCarlo, P. F, Tritscher, T, Praplan, A. P, Platt, S. M, Prévôt, A. S. H, Donahue, N. M, Baltensperger, U

“…The hydroxyl free radical (OH) is the major oxidizing species in the lower atmosphere. Measuring the OH concentration is generally difficult and involves…”
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Volatility and hygroscopicity of aging secondary organic aerosol in a smog chamber by Tritscher, T., Dommen, J., DeCarlo, P. F., Gysel, M., Barmet, P. B., Praplan, A. P., Weingartner, E., Prévôt, A. S. H., Riipinen, I., Donahue, N. M., Baltensperger, U.

“…The evolution of secondary organic aerosols (SOA) during (photo-)chemical aging processes was investigated in a smog chamber. Fresh SOA from ozonolysis of 10…”
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Dimethylamine and ammonia measurements with ion chromatography during the CLOUD4 campaign by Praplan, A. P, Bianchi, F, Dommen, J, Baltensperger, U

“…The CLOUD project investigates the influence of galactic cosmic rays on the nucleation of new particles in an environmental chamber at CERN. Dimethylamine…”
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Cyclobutyl methyl ketone as a model compound for pinonic acid to elucidate oxidation mechanisms by Praplan, A. P, Barmet, P, Dommen, J, Baltensperger, U

“…Although oxidation of the atmospherically relevant compound α-pinene has been extensively studied, chemical mechanisms leading to the formation of later…”
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Bisulfate – cluster based atmospheric pressure chemical ionization mass spectrometer for high-sensitivity (< 100 ppqV) detection of atmospheric dimethyl amine: proof-of-concept and first ambient data from boreal forest by Sipilä, M, Sarnela, N, Jokinen, T, Junninen, H, Hakala, J, Rissanen, M. P, Praplan, A, Simon, M, Kürten, A, Bianchi, F, Dommen, J, Curtius, J, Petäjä, T, Worsnop, D. R

“…Atmospheric amines may play a crucial role in formation of new aerosol particles via nucleation with sulfuric acid. Recent studies have revealed that…”
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Online measurements of water-soluble organic acids in the gas and aerosol phase from the photooxidation of 1,3,5-trimethylbenzene by Praplan, A. P, Hegyi-Gaeggeler, K, Barmet, P, Pfaffenberger, L, Dommen, J, Baltensperger, U

“…The formation of organic acids during photooxidation of 1,3,5-trimethylbenzene (TMB) in the presence of NOx was investigated with an online ion chromatography…”
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CCN activity and volatility of β-caryophyllene secondary organic aerosol by Frosch, M., Bilde, M., Nenes, A., Praplan, A. P., Jurányi, Z., Dommen, J., Gysel, M., Weingartner, E., Baltensperger, U.

“…In a series of smog chamber experiments, the cloud condensation nuclei (CCN) activity of secondary organic aerosol (SOA) generated from ozonolysis of…”
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Thermodynamics of the formation of sulfuric acid dimers in the binary (H 2 SO 4 –H 2 O) and ternary (H 2 SO 4 –H 2 O–NH 3 ) system by Kürten, A, Münch, S, Rondo, L, Bianchi, F, Duplissy, J, Jokinen, T, Junninen, H, Sarnela, N, Schobesberger, S, Simon, M, Sipilä, M, Almeida, J, Amorim, A, Dommen, J, Donahue, N M, Dunne, E M, Flagan, R C, Franchin, A, Kirkby, J, Kupc, A, Makhmutov, V, Petäjä, T, Praplan, A P, Riccobono, F, Steiner, G, Tomé, A, Tsagkogeorgas, G, Wagner, P E, Wimmer, D, Baltensperger, U, Kulmala, M, Worsnop, D R, Curtius, J

“…Sulfuric acid is an important gas influencing atmospheric new particle formation (NPF). Both the binary (H2SO4–H2O) system and the ternary system involving…”
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Effect of dimethylamine on the gas phase sulfuric acid concentration measured by Chemical Ionization Mass Spectrometry by Rondo, L., Ehrhart, S., Kürten, A., Adamov, A., Bianchi, F., Breitenlechner, M., Duplissy, J., Franchin, A., Dommen, J., Donahue, N. M., Dunne, E. M., Flagan, R. C., Hakala, J., Hansel, A., Keskinen, H., Kim, J., Jokinen, T., Lehtipalo, K., Leiminger, M., Praplan, A., Riccobono, F., Rissanen, M. P., Sarnela, N., Schobesberger, S., Simon, M., Sipilä, M., Smith, J. N., Tomé, A., Tröstl, J., Tsagkogeorgas, G., Vaattovaara, P., Winkler, P. M., Williamson, C., Wimmer, D., Baltensperger, U., Kirkby, J., Kulmala, M., Petäjä, T., Worsnop, D. R., Curtius, J.

“…Sulfuric acid is widely recognized as a very important substance driving atmospheric aerosol nucleation. Based on quantum chemical calculations it has been…”
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Elemental composition and clustering behaviour of α-pinene oxidation products for different oxidation conditions by Praplan, A. P., Schobesberger, S., Bianchi, F., Rissanen, M. P., Ehn, M., Jokinen, T., Junninen, H., Adamov, A., Amorim, A., Dommen, J., Duplissy, J., Hakala, J., Hansel, A., Heinritzi, M., Kangasluoma, J., Kirkby, J., Krapf, M., Kürten, A., Lehtipalo, K., Riccobono, F., Rondo, L., Sarnela, N., Simon, M., Tomé, A., Tröstl, J., Winkler, P. M., Williamson, C., Ye, P., Curtius, J., Baltensperger, U., Donahue, N. M., Kulmala, M., Worsnop, D. R.

“…This study presents the difference between oxidised organic compounds formed by α-pinene oxidation under various conditions in the CLOUD environmental chamber:…”
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Modeling the thermodynamics and kinetics of sulfuric acid-dimethylamine-water nanoparticle growth in the CLOUD chamber by Ahlm, L., Yli-Juuti, T., Schobesberger, S., Praplan, A. P., Kim, J., Tikkanen, O.-P., Lawler, M. J., Smith, J. N., Tröstl, J., Acosta Navarro, J. C., Baltensperger, U., Bianchi, F., Donahue, N. M., Duplissy, J., Franchin, A., Jokinen, T., Keskinen, H., Kirkby, J., Kürten, A., Laaksonen, A., Lehtipalo, K., Petäjä, T., Riccobono, F., Rissanen, M. P., Rondo, L., Schallhart, S., Simon, M., Winkler, P. M., Worsnop, D. R., Virtanen, A., Riipinen, I.

“…Dimethylamine (DMA) has a stabilizing effect on sulfuric acid (SA) clusters, and the SA and DMA molecules and clusters likely play important roles in both…”
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Evolution of particle composition in CLOUD nucleation experiments by Keskinen, H, Virtanen, A, Joutsensaari, J, Tsagkogeorgas, G, Duplissy, J, Schobesberger, S, Gysel, M, Riccobono, F, Slowik, J. G, Bianchi, F, Yli-Juuti, T, Lehtipalo, K, Rondo, L, Breitenlechner, M, Kupc, A, Almeida, J, Amorim, A, Dunne, E. M, Downard, A. J, Ehrhart, S, Franchin, A, Kajos, M.K, Kirkby, J, Kürten, A, Nieminen, T, Makhmutov, V, Mathot, S, Miettinen, P, Onnela, A, Petäjä, T, Praplan, A, Santos, F. D, Schallhart, S, Sipilä, M, Stozhkov, Y, Tomé, A, Vaattovaara, P, Wimmer, D, Prevot, A, Dommen, J, Donahue, N. M, Flagan, R.C, Weingartner, E, Viisanen, Y, Riipinen, I, Hansel, A, Curtius, J, Kulmala, M, Worsnop, D. R, Baltensperger, U, Wex, H, Stratmann, F, Laaksonen, A

“…Sulphuric acid, ammonia, amines, and oxidised organics play a crucial role in nanoparticle formation in the atmosphere. In this study, we investigate the…”
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The link between organic aerosol mass loading and degree of oxygenation: an α-pinene photooxidation study by Pfaffenberger, L., Barmet, P., Slowik, J. G., Praplan, A. P., Dommen, J., Prévôt, A. S. H., Baltensperger, U.

“…A series of smog chamber (SC) experiments was conducted to identify factors responsible for the discrepancy between ambient and SC aerosol degree of…”
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Aging of biogenic secondary organic aerosol via gas-phase OH radical reactions by Donahue, Neil M, Henry, Kaytlin M, Mentel, Thomas F, Kiendler-Scharr, Astrid, Spindler, Christian, Bohn, Birger, Brauers, Theo, Dorn, Hans P, Fuchs, Hendrik, Tillmann, Ralf, Wahner, Andreas, Saathoff, Harald, Naumann, Karl-Heinz, Möhler, Ottmar, Leisner, Thomas, Müller, Lars, Reinnig, Marc-Christopher, Hoffmann, Thorsten, Salo, Kent, Hallquist, Mattias, Frosch, Mia, Bilde, Merete, Tritscher, Torsten, Barmet, Peter, Praplan, Arnaud P, DeCarlo, Peter F, Dommen, Josef, Prévôt, Andre S.H, Baltensperger, Urs

“…The Multiple Chamber Aerosol Chemical Aging Study (MUCHACHAS) tested the hypothesis that hydroxyl radical (OH) aging significantly increases the concentration…”
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Detection of dimethylamine in the low pptv range using nitrate chemical ionization atmospheric pressure interface time-of-flight (CI-APi-TOF) mass spectrometry by Simon, Mario, Heinritzi, Martin, Herzog, Stephan, Leiminger, Markus, Bianchi, Federico, Praplan, Arnaud, Dommen, Josef, Curtius, Joachim, Kürten, Andreas

“…Amines are potentially important for atmospheric new particle formation, but their concentrations are usually low with typical mixing ratios in the pptv range…”
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CCN activity and volatility of [beta]-caryophyllene secondary organic aerosol by Frosch, M, Bilde, M, Nenes, A, Praplan, A P, Jurányi, Z, Dommen, J, Gysel, M, Weingartner, E, Baltensperger, U

“…In a series of smog chamber experiments, the cloud condensation nuclei (CCN) activity of secondary organic aerosol (SOA) generated from ozonolysis of…”
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Thermodynamics of the formation of sulfuric acid dimers in the binary system by Kürten, A, Münch, S, Rondo, L, Bianchi, F, Duplissy, J, Jokinen, T, Junninen, H, Sarnela, N, Schobesberger, S, Simon, M, Sipilä, M, Almeida, J, Amorim, A, Dommen, J, Donahue, N. M, Dunne, E. M, Flagan, R. C, Franchin, A, Kirkby, J, Kupc, A, Makhmutov, V, Petäjä, T, Praplan, A. P, Riccobono, F, Steiner, G, Tomé, A, Tsagkogeorgas, G, Wagner, P. E, Wimmer, D, Baltensperger, U, Kulmala, M, Worsnop, D. R, Curtius, J

“…Sulfuric acid is an important gas influencing atmospheric new particle formation (NPF). Both the binary (H.sub.2 SO.sub.4 -H.sub.2 O) system and the ternary…”
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Undetected biogenic volatile organic compounds from Norway spruce drive total ozone reactivity measurements by Thomas, Steven Job, Tykkä, Toni, Hellén, Heidi, Bianchi, Federico, Praplan, Arnaud P

“…Biogenic volatile organic compounds (BVOCs) are continuously emitted from terrestrial vegetation into the atmosphere and react with various atmospheric…”
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