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Jiacheng Yang; Patrick Roth, Thomas D Durbin, Martin M Shafer, Jocelyn Hemming, Dagmara Antkiewicz, Akua Asa-Awuku, Georgios Karavalakis. “Emissions from a Flex Fuel GDI Vehicle Operating on Ethanol Fuels Show Marked Contrasts in Chemical, Physical and Toxicological Characteristics as a Function of Ethanol Content”. Science of the Total Environment, https://doi.org/10.1016/j.scitotenv.2019.05.279
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Vu, Diep, Patrick Roth, Tyler Berte, Jiacheng Yang,David R. Cocker, Thomas D. Durbin, Georgios Karavalakis, and Akua Asa-Awuku. “Using a new Mobile Atmospheric Chamber (MACh) to investigate the formation of secondary aerosols from mobile sources: The case of gasoline direct injection vehicles.”Journal of Aerosol Science (2019). 133, 1-11. https://doi.org/10.1016/j.jaerosci.2019.03.009
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Roth, Patrick, Jiacheng Yang, Emmanuel Fofie, David R. Cocker, Thomas D. Durbin, Rasto Brezny, Michael Geller, Akua Asa-Awuku, and Georgios Karavalakis. “Catalyzed Gasoline Particulate Filters Reduce Secondary Organic Aerosol Production from Gasoline Direct Injection Vehicles.” Environmental science & technology (2019). https://pubs.acs.org/doi/abs/10.1021/acs.est.8b06418
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Yang, J. , Roth, P., Ruehl, CR. Shafer, MM., Antkiewicz, DS., Durbin, T.D., Cocker, D.R., Asa-Awuku, A. and G. Karavalakis. “Physical, chemical, and toxicological characteristics of particulate emissions from current technology gasoline direct injection vehicles.” Science of the Total Environment. 650 (2019): 1182-1194. https://doi.org/10.1016/j.scitotenv.2018.09.110
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Yang, Jiacheng, Patrick Roth, Thomas D. Durbin, Kent C. Johnson, Akua Asa-Awuku, David R. Cocker III, and Georgios Karavalakis. “Investigation of the Effect of Mid-And High-Level Ethanol Blends on the Particulate and the Mobile Source Air Toxic Emissions from a Gasoline Direct Injection Flex Fuel Vehicle.” Energy & Fuels 33, no. 1 (2019): 429-440. doi:10.1021/acs.energyfuels.8b02206 https://pubs.acs.org/doi/abs/10.1021/acs.energyfuels.8b02206
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Lin, Y., Bahreini, R., Zimmerman, S., Fofie, E. A., Asa-Awuku, A., Park, K., Lee, S-B., Bae, G-N. and H. S. Jung. “Investigation of ambient aerosol effective density with and without using a catalytic stripper.” Atmospheric Environment (2018). 187, 84-92 https://doi.org/10.1016/j.atmosenv.2018.05.063
Jiang, J., Yang, J., Gagné, S., Chan, T. W., Thomson, K., Fofie, E., Cary, R. A.,Dan Rutherford, D., Bryan Comer,B., Jacob Swanson, J., Lin, Y. Van Rooy, P, Asa-Awuku, A. ,Jung, H.,
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Barsanti, K., Karavalakis. G, David Cocker, D., Durbin, T. D., Miller, J. W., K. C. Johnson. Sources of variance in BC mass measurements from a small marine engine: Influence of the instruments, fuels and loads. Atmospheric Environment. 182 (2018): 128-137. https://doi.org/10.1016/j.atmosenv.2018.03.008
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Yang, J., Roth, P., Durbin, T.D., Johnson, K.C., Cocker, D.R., Asa-Awuku, A., Brezny, R., Geller, M. and Karavalakis, G., 2018. Gasoline Particulate Filters as an Effective Tool to Reduce Particulate and PAH Emissions from GDI Vehicles: A Case Study with Two GDI Vehicles. Environmental science & technology. (2018). 52 (5), pp 3275–3284. 10.1021/acs.est.7b05641 https://pubs.acs.org/doi/full/10.1021/acs.est.7b05641
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Fofie, E. A., Donahue, N. M., & Asa-Awuku, A. (2018). Cloud condensation nuclei activity and droplet formation of primary and secondary organic aerosol mixtures. Aerosol Science and Technology, 52(2), 242-251. https://doi.org/10.1080/02786826.2017.1392480
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Vizenor, A., & Asa-Awuku, A. Gas-phase kinetics modifies the CCN activity of biogenic SOA. Physical Chemistry Chemical Physics. no. 9 (2018), 6591-6597.
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Fofie, E., V. Castelluccio, and A. Asa-Awuku. “Exploring CCN Droplet Suppression with a Higher Sensitivity Optical Particle Counter.” Aerosol Science and Technology (2018): 52, no.1, 78-86. http://dx.doi.org/10.1080/02786826.2017.1379592.
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Piqueras, P., Li, F., Castelluccio, V., Matsumoto, M., & *Asa-Awuku, A. (2016). Real-Time Ultrafine Aerosol Measurements from Wastewater Treatment Facilities. Environmental Science & Technology, 50(20), 11137-11144.
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Short, D., Vu, D., Chen, V., Espinoza, C., Berte, T., Karavalakis, G., Durbin, TD and *Asa-Awuku, A. (2017). Understanding particles emitted from spray and wall-guided gasoline direct injection and flex fuel vehicles operating on ethanol and iso-butanol gasoline blends. Aerosol Science and Technology, 51(3), 330-341.
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Vu, D., Short, D. Z., Karavalakis, G., Durbin, T. D., & &Asa-Awuku, A. (2017). Will Aerosol Hygroscopicity Change with Biodiesel, Renewable Diesel Fuels and Emission Control Technologies? Environmental Science & Technology.
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Clark, C. H., Kacarab, M., Nakao, S., Asa-Awuku, A., Sato, K., & Cocker, D. R.(2016). Temperature effects on secondary organic aerosol (SOA) from the dark ozonolysis and photo-oxidation of isoprene. Environmental science & technology.
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Giordano, M. R., Chong, J., Weise, D. R., & Asa-Awuku, A. A. (2016). Does chronic nitrogen deposition during biomass growth affect atmospheric emissions from biomass burning?. Environmental Research Letters, 11(3), 034007.
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Asa-Awuku, A., Sorooshian, A., Flagan, R.C., Seinfeld, J.H., Nenes, A. CCN Properties of Organic Aerosol Collected Below and within Marine Stratocumulus Clouds near Monterey, California. Atmospheres (2015) 6 (11), 1590-1607
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Vu, D., D. Short, G. Karavalakis; T. Durbin; and A. Asa-Awuku. Integrating Cloud Condensation Nuclei Predictions with Fast Time Resolved Aerosol Instrumentation to Determine the Hygroscopic Properties of Emissions over Transient Drive Cycles Aerosol Science and Technology. (2015) 49 (11), 1149-1159
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Short, D., Vu, D., Durbin, T., Karavalakis, G., Asa-Awuku, A. "Components of Particle Emissions from Light-Duty Spark-Ignition Vehicles with Varying Aromatic Content and Octane Rating in Gasoline." Environmental Science & Technology (2015). 49 (17), pp 10682–10691
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Xue, J., Li, Y., Wang, X., Durbin, T., Johnson, K.C., Karavalakis, G., Asa-Awuku, A., Villela, M., Quiros, D., Hu, S., Huai, T., Ayala, A.,Jung, H. Comparison of vehicle exhaust particle size distributions by SMPS and EEPS during steady state operating conditions. Aerosol Science and Technology (2015.)
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Karavalakis, Georgios, Daniel Short, Diep Vu, Robert L. Russell, Akua Asa-Awuku, Heejung Jung, Kent C. Johnson, and Thomas D. Durbin. "The impact of ethanol and iso-butanol blends on gaseous and particulate emissions from two passenger cars equipped with spray-guided and wall-guided direct injection SI (spark ignition) engines." Energy 82 (2015): 168-179.
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Karavalakis, Georgios, Daniel Z. Short, Diep Vu, Robert L. Russell, Maryam Hajbabaei, Akua Asa-Awuku, and Thomas D. Durbin. "Evaluating the Effects of Aromatics Content in Gasoline on Gaseous and Particulate Matter Emissions from SI-PFI and SI-DI Vehicles." Environmental science & technology, 49, 7021-7031 (2015).
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Short, D., Vu, D., Durbin, T., Karavalakis, G., Asa-Awuku, A. Particle Speciation of Emissions from Iso-Butanol and Ethanol Blended Gasoline in Light-Duty Spark-Ignition Vehicles. Journal of Aerosol Science. (2015): 39-52.
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Karavalakis, G., Short, D., Russell, R., Jung, H., Johnson, K.C., Asa-Awuku, A., Durbin, T. Assessing the Impacts of Ethanol and Iso-Butanol Impacts on Gaseous and Particulate Emissions from Flexible Fuel Vehicles. Environmental Science and Technology. 48, 14016-14024, 2014
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Short, D., Giordano, M., Zhu, Y., Fine, P., Polidori, A., Asa-Awuku, A. A Unique On-line Method to Infer Water-Insoluble Particle Contributions. Aerosol Science and Technology. Vol. 48: 7 p.706-714. 9p. 2014
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Tan, C.L., Gao, S., Wee, S., Asa-Awuku, A., B, T.R. Adhesion of Dust Particles to Common Indoor Surfaces in Air-Conditioned Environment. Aerosol Science and Technology. Vol. 48: 5 p.541-551. , 2014
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Tang, X., Price, D., Praske, E.J., Vu, D., Purvis-Roberts, K., Silva, P., Cocker III, D.R., Asa-Awuku, A. CCN Activity of Two Aliphatic Amine Secondary Aerosol. Atmospheric Chemistry and Physics. Vol. 14: p.5959-5967. , 2014
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Karavalakis, G., Short, D., Vu, D., Villela, M., Asa-Awuku, A., Durbin, T. Evaluating the regulated emissions, air toxics, ultrafine particles, and black carbon from SI-PFI and SI-DI vehicles operating on different ethanol and iso-butanol blends. Fuel. Vol. 128: p.410-421. 2014
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Giordano, M., Asa-Awuku, A. Rebuttal to Correspondence on “Changes in Droplet Surface Tension Affect the Observed Hygroscopicity of Photochemically Aged Biomass Burning Aerosol”. Environmental Science and Technology. Vol. 48: 3 p.2084-2085, 2014.
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Kreidenweis, S., Asa-Awuku, A. Aerosol Hygroscopicity: Particle Water Content and Its Role in Atmospheric Processes. Treatise on Geochemistry 2nd Edition. Editors: H. D. Holland, K.K. Turekian. Elseiver. Oxford. Vol. 5: p.331-361, 2014
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Clark, C. H. , S. Nakao, A. Asa-Awuku, K. Sato, and *D. R. Cocker. Real-time study of particle-phase products from α-pinene ozonolysis and isoprene photo-oxidation using particle into liquid sampling directly coupled to a time of flight mass spectrometer (PILS-ToF), Aerosol Sci. & Tech., p.1374-1382. 2013
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Giordano, M. R., D. Z. Short, E. Hosseini, W. Lichtenberg, and A. Asa-Awuku. Changes in Droplet Surface Tension Affect the Observed Hygroscopicity of Photochemically Aged Biomass Burning Aerosol. Env. Sci. & Tech. doi:10.1021/es401867j, 2013
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Tang, X., D. Price, E. Praske, S. A. Lee, M. A. Shattuck, K. Purvis-Roberts, P. Silva, A. Asa-Awuku, and D. R. Cocker III. NO3 radical, OH radical and O3- initiated secondary aerosol formation from aliphatic amines- salt formation and the effect of water vapor. Atmos. Environ. 72, 105–112, 2013
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S. Nakao, P. Tang, X.Tang, C. H. Clark, L. Qi, A. Asa-Awuku, D. R. Cocker III. Density and elemental ratios of secondary organic aerosol: application of a density prediction method. Atmos. Environment, 68, 273 -277, 2013
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Tang, X., Cocker III, D. R., and *Asa-Awuku, A.: Are sesquiterpenes a good source of secondary organic cloud condensation nuclei (CCN)? Revisiting β-caryophyllene CCN, Atmos. Chem. Phys., 12, 8377-8388, doi:10.5194/acp-12-8377-2012, 2012
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M. Y. Khan, M. Giordano , J. Gutierrez, W. A. Welch, A. Asa-Awuku, J. W. Miller, *D. R. Cocker III, Benefits of Two Mitigation Strategies for Container Vessels: Cleaner Engines and Cleaner Fuels, Environmental Science and Technology. Environ. Sci. Technol., 2012, 46 (9), pp 5049–5056 DOI: 10.1021/es2043646
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X. Tang, Z. Zheng, H S. Jung, *A. Asa-Awuku. The Effects of Mainstream and Sidestream Environmental Tobacco Smoke Composition for Enhanced Condensational Droplet Growth by Water Vapor. Aerosol Science and Technology, Vol. 46, Iss. 7, 2012
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A. Asa-Awuku, R. Moore, A. Nenes, R. Bahreini, C. A. Brock, A. Middlebrook, J. Holloway , T. Ryerson, J. Jimenez, P. DeCarlo , A. Hecobian, R. Weber , D. Tanner , R. Stickel and L. G. Huey ''Airborne Cloud Condensation Nuclei Measurements during the 2006 Texas Air Quality Study'' J. Geophys. Res., 116, D11201, doi:10.1029/2010JD014874, 2011
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Z. Zheng, X. Tang, A. Asa-Awuku, H. Jung, Characterization of a Method for Aerosol Generation from Heavy Fuel Oil (HFO) as an Alternative to Emissions from Ship Diesel Engines, Journal of Aerosol Science, 41(12), 1143-1151, 2010
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Asa-Awuku, A., *Nenes, A., Gao, S., Flagan, R. C., and Seinfeld, J. H.: Water-soluble SOA from Alkene ozonolysis: composition and droplet activation kinetics inferences from analysis of CCN activity, Atmos. Chem. Phys., 10, 1585-1597, 2010.
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Asa-Awuku, A., M. A. Miracolo, J. H. Kroll, A. L. Robinson, and N. M. Donahue, Mixing and phase partitioning of primary and secondary organic aerosols, Geophys. Res. Lett., 36, L15827, doi:10.1029/2009GL039301, 2009
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Asa-Awuku, A., G.J. Engelhart., B.H. Lee, S.N. Pandis and *A. Nenes, Relating CCN activity, volatility, and droplet growth kinetics of β-caryophyllene secondary organic, Atmospheric Chemistry and Physics, 9, 795-812, 2009
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Asa-Awuku, A., A. P. Sullivan, C.J. Hennigan, R. J. Weber and *A. Nenes, Investigation of Molar Volume and Surfactant Characteristics of water-soluble Organic Compounds in Biomass Burning Aerosol, Atmospheric Chemistry and Physics, 8, 799-812, 2008
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Engelhart G.J., A. Asa-Awuku, A. Nenes and *S. N. Pandis, CCN activity and droplet growth kinetics of fresh and aged monoterpene secondary organic aerosol , Atmospheric Chemistry and Physics, 8, 3937-3949, 2008
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Padró, L.T., A. Asa-Awuku, R. Morisson, and *A. Nenes, Inferring Thermodynamic Properties from CCN Activation Experiments a) Single-component and Binary Aerosols, Atmospheric Chemistry and Physics, 7, ,3805-3836, 2007
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Asa-Awuku, A., and *A. Nenes (2007), Effect of solute dissolution kinetics on cloud droplet formation: Extended Koehler theory, Journal of Geophysical. Research, 112, D22201, 2007 doi:10.1029/2005JD006934
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