Zobrazeno 1 - 10
of 80
pro vyhledávání: '"M V, Johnston"'
Publikováno v:
Atmospheric Measurement Techniques, Vol 15, Pp 4663-4674 (2022)
Flow tube reactors are often used to study aerosol kinetics. The goal of this study is to investigate how to best represent complex growth kinetics of ultrafine particles within a flow tube reactor when the chemical processes causing particle growth
Externí odkaz:
https://doaj.org/article/8af6a6e50e414e5a993135f37796aa0a
Autor:
L. Tiszenkel, C. Stangl, J. Krasnomowitz, Q. Ouyang, H. Yu, M. J. Apsokardu, M. V. Johnston, S.-H. Lee
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 8915-8929 (2019)
New particle formation (NPF) consists of two steps: nucleation and subsequent growth. At present, chemical and physical mechanisms that govern these two processes are not well understood. Here, we report initial results obtained from the TANGENT (Tan
Externí odkaz:
https://doaj.org/article/347f9c6f083e4d26b1cfc91bec6362b1
Autor:
M. J. Apsokardu, M. V. Johnston
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 1895-1907 (2018)
The ability of particle-phase chemistry to alter the molecular composition and enhance the growth rate of nanoparticles in the 2–100 nm diameter range is investigated through the use of a kinetic growth model. The molecular components included a
Externí odkaz:
https://doaj.org/article/12305ef1cda3493e8fad2efbf52650e9
Autor:
P. Tu, M. V. Johnston
Publikováno v:
Atmospheric Chemistry and Physics, Vol 17, Pp 7593-7603 (2017)
Formation of secondary organic aerosol (SOA) is initiated by the oxidation of volatile organic compounds (VOCs) in the gas phase whose products subsequently partition to the particle phase. Non-volatile molecules have a negligible evaporation rate
Externí odkaz:
https://doaj.org/article/b54067d462c54601993230ef27e98adf
Autor:
M. R. Pennington, B. R. Bzdek, J. W. DePalma, J. N. Smith, A.-M. Kortelainen, L. Hildebrandt Ruiz, T. Petäjä, M. Kulmala, D. R. Worsnop, M. V. Johnston
Publikováno v:
Atmospheric Chemistry and Physics, Vol 13, Iss 20, Pp 10215-10225 (2013)
Atmospheric new particle formation (NPF) is a key source of ambient ultrafine particles that may contribute substantially to the global production of cloud condensation nuclei (CCN). While NPF is driven by atmospheric nucleation, its impact on CCN co
Externí odkaz:
https://doaj.org/article/081e7f9efb1145f49208678b3a18e4f1
Publikováno v:
Atmospheric Chemistry and Physics, Vol 11, Iss 16, Pp 8735-8743 (2011)
The distribution of charged species produced by electrospray of an ammonium sulfate solution in both positive and negative polarities is examined using Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS). Positively-charged ammoniu
Externí odkaz:
https://doaj.org/article/16cc7b46245d4387b232081b0b258610
Publikováno v:
Atmospheric Chemistry and Physics, Vol 10, Iss 8, Pp 3495-3503 (2010)
The exchange kinetics and thermodynamics of amines for ammonia in small (1–2 nm diameter) ammonium bisulfate and ammonium nitrate clusters were investigated using electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (
Externí odkaz:
https://doaj.org/article/a683910ef1c747ad9f23370868fbf53c
Autor:
D. M. Murphy, P. K. Hudson, D. J. Cziczo, S. Gallavardin, K. D. Froyd, M. V. Johnston, A. M. Middlebrook, M. S. Reinard, D. S. Thomson, T. Thornberry, A. S. Wexler
Publikováno v:
Atmospheric Chemistry and Physics, Vol 7, Iss 12, Pp 3195-3210 (2007)
Three independent single particle mass spectrometers measured Pb in individual aerosol particles. These data provide unprecedented sensitivity and statistical significance for the measurement of Pb in single particles. This paper explores the reasons
Externí odkaz:
https://doaj.org/article/4dbde015750b404db6abfa39d4e57c05
Publikováno v:
Advances in pharmacology (San Diego, Calif.). 76
Excitotoxicity is a mechanism of neuronal injury, implicated in the pathogenesis of many acute and chronic neurologic disorders, including perinatal brain injury associated with hypoxia-ischemia and exposure to intrauterine inflammation. Glutamate, t
Excitotoxicity is a mechanism of neuronal injury, implicated in the pathogenesis of many acute and chronic neurologic disorders, including perinatal brain injury associated with hypoxia-ischemia and exposure to intrauterine inflammation. Glutamate, t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd5742a58e1a68e1efc477c45f19a937
https://doi.org/10.1016/bs.apha.2016.02.003
https://doi.org/10.1016/bs.apha.2016.02.003