Welcome to Qi Zhang's Web Site!!!

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QZ   

   
QI ZHANG
Research Associate, Atmospheric Sciences Research Center

Assistant Professor, Department of Environmental Health Sciences

State University of New York, University at Albany

 

ASRC, CESTM L110

251 Fuller Rd
Albany, NY 12203
Tel: (518)437-8752 (O)
         Fax: (518)437-8758
E-mail: EmailAddress

 

RESEARCH TOPICS

-         Aerosol Mass Spectrometry:

·          Field and laboratory studies using a High-Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS).

-         Data analysis and interpretation:

·         Develop highly time-resolved source apportionment techniques for organic aerosols.

·         In-depth data analysis of urban, rural, and remote aerosol mass spectrometer datasets.

-         Studies of fog and cloud chemistry

 

Research Opportunities

Graduate student positions available.  If you are interested in working in my group or would like more information, please feel free to contact me by email or phone call.

AMS GLOBAL DATABASE

AMS ORGANIC DATA ANALYSIS:

1. AMS Organic Analysis Basics:

·    Tutorial presentation at the 6th AMS User's Meeting in Juelich, Germany, Fall, 2005.

2. AMS Organic Analysis Software

·    This code resolves the mass spectra and time series of 2 organic aerosol components, which correspond to hydrocarbon-like and oxygenated organic aerosol (HOA and OOA) in applicable locations.

Version

Date of Release

Release Notes*

Installer

v 1.2

March 16, 2007

modified 04/19/07

Release Notes

1.            Download ExtractWaves&matrices v1.2 (for SQUIRREL)

2.            Download AMS Organic Analysis Software v1.2

v 1.1

Nov. 20, 2005

Release Notes
Notes on AMS Organic Analysis Toolkit v 1.1.

1.            Download ExtractWaves&matrices v1.1

2.            Download AMS Organic Analysis Software v1.1

v 1.0

Aug. 26, 2005

Notes on AMS Organic Analysis Toolkit v 1.0.

1.            Download ExtractWaves&matrices v1.0

2.            Download AMS Organic Analysis Software v1.0

 

* Important: Please carefully check all the diagnostic information, especially the relative and absolute residuals in the time trend (see Figures 4 & 5 in our EST paper) and the extracted mass spectra, before presenting/publishing results from this software.  It is also important that you examine the diagnostic plots such as Figures 7 & 8 in our EST paper. The presence of significant negative peaks in the extract mass spectra, for example, is typically a sign of lack of fit between the model (assumptions) and the real data.  It is highly recommended that you CONTACT us if you see strange results and/or you have questions about interpretation.

 

Most importantly, this code will NOT give reasonable results in a situation where more than two distinct components clearly make an impact in the data. It is therefore NOT recommended to use for rural or remote locations, when we find that in general the two-component method is insufficient, as we discussed at the 6th users meeting in Juelich.  We found this code works properly for several urban locations and yields physically and chemically meaningful results on HOA and OOA (e.g., in Pittsburgh (Zhang et al., 2005), Mexico City (Volkamer et al., 2006), and Tokyo (Takegawa et al. 2006, Kondo et al., 2006)).  However, at some urban locations (as shown in our Mexico City data) the code is applicable for some periods of time, but not for others in which biomass burning made a clear impact.  So, when you see large absolute residuals in the time trend and/or if you know the presence of significant amounts of other source components from observations or from other measurements, you will need to use a method that can find more than 2 components.

 

A new version of this algorithm has been developed to do more than 2-component analysis. It has successfully identified 4 meaningful components in the Houston AMS data from summer 2000. If time permits, this new algorithm can be applied to other datasets in collaboration with AMS Users.

RESEARCH EXPERIENCE

·                    Research Scientist/Postdoctoral Research Associate (Advisor Dr. Jose-Luis Jimenez), Cooperative Institute for Research in Environmental Sciences (CIRES) , University of Colorado, Boulder (2002– 2005)

·                    Ph.D., Atmospheric Chemistry (Advisor Dr. Cort Anastasio), Department of Land, Air and, Water Resources , University of California, Davis (1997 - 2002)

·                    M.S., Bioinorganic Chemistry (Advisor, Dr. Wen Xia Tang), Department of Chemistry , Nanjing University, P.R. China (1994 - 1997)

PEER-REVIEWED PUBLICATIONS

  1. McKendry, I.G., A. McDonald, R.W. Leaitch, A. van Donkelaar, Qi Zhang, T. Duck, and R.V. Martin (2008) Trans-Pacific dust events observed at Whistler, British Columbia during INTEX-B, Atmospheric Chemistry and Physics Discussions, 8, 10275-10300. PDF
  2. Ulbrich, I., M. Canagratna, Qi Zhang, D. Worsnop, and J. Jimenez (2008) Interpretation of Organic Components from Positive Matrix Factorization of Aerosol Mass Spectrometric Data, Atmospheric Chemistry and Physics Discussions, 6729-6791.PDF
  3. Aiken, A.C., P.F. DeCarlo, J.H. Kroll, D.R. Worsnop, J.A. Huffman, K. Docherty, I.M. Ulbrich, C. Mohr, J.R. Kimmel, D. Sueper, Y. Sun, Qi Zhang, A. Trimborn, M. Northway, P.J. Ziemann, M.R. Canagaratna, R. Alfarra, A. Prevot, J. Dommen, J. Duplissy, A. Metzger, U. Baltensperger, and J.L. Jimenez (2008) O/C and OM/OC Ratios of Primary, Secondary, and Ambient Organic Aerosols with a High Resolution Time-of-Flight Aerosol Mass Spectrometer, Environ. Sci. and Technol. 10.1021/es703009q.PDF
  4. Cottrell, L.D., R.J. Griffin, J.L. Jimenez, Qi Zhang, I. Ulbrich, L.D. Ziemba, P.J. Beckman, B.C. Sive, and R.W. Talbot (2008) Submicron particles at Thompson Farm during ICARTT measured using Aerosol Mass Spectrometry, J. Geophys. Res., 113, D08212, doi:10.1029/2007JD009192.PDF
  5. Qi Zhang, J.L. Jimenez, M.R. Canagaratna, J.D. Allan, H. Coe, I. Ulbrich, M.R. Alfarra, A. Takami, A.M. Middlebrook, Y.L. Sun, K. Dzepina, E. Dunlea, K. Docherty, P.F. DeCarlo, D. Salcedo, T. Onasch, J.T. Jayne, T. Miyoshi, A. Shimono, S. Hatakeyama, N. Takegawa, Y. Kondo, J. Schneider, F. Drewnick, S. Weimer, K. Demerjian, P. Williams, K. Bower, R. Bahreini, L. Cotrell, R.J. Griffin, J. Rautiainen, J.Y. Sun, Y.M. Zhang, and D.R. Worsnop (2007) Ubiquity and Dominance of Oxygenated Species in Organic Aerosols in Anthropogenically-Influenced Northern Hemisphere Mid-latitudes, Geophysical Research Letters, 34, L13801, doi:10.1029/2007GL029979 PDF, Download Figures 1&2, Download Table S1&S2
  6. Qi Zhang, Jimenez, J., Worsnop, D., and Canagaratna, M. (2007) A Case Study of Urban Particle Acidity and Its Influence on Secondary Organic Aerosol, Environmental Science & Technology, 41 (10), DOI 10.1021/es061812j PDF, supporting info
    7. Most-Cited Articles published in 2007, http://pubs.acs.org/journals/esthag/promo/most/most_cited/2007.html.
  7. Bae, M.-S., J.J. Schwab, Qi Zhang, O. Hogrefe, K.L. Demerjian, S. Weimer, K. Rhoads, D. Orsini, P. Venkatachari, and P.K. Hopke (2007) Interference of Organic Signals in Highly-time Resolved Nitrate Measurements by Aerosol Mass Spectrometer, Journal of Geophysical Research, 112, D22305, doi:10.1029/2007JD008614 PDF
  8. Dzepina, K., Arey, J., Marr, L.,Worsnop, D., Salcedo, D., Qi Zhang, Molina, L., Molina, M., and Jimenez, J. (2007) Detection of Particle-Phase Polycyclic Aromatic Hydrocarbons (PAHs) in Mexico City Using an Aerosol Mass Spectrometer. International Journal of Mass Spectrometry, 263, 152-170, PDF
  9. Canagaratna, M., Jayne, J., Jimenez, J., Allan, J., Alfarra, R., Qi Zhang, Onasch, T., Drewnick, F., Coe, H., Middlebrook, A., Delia, A., Williams, L., Trimborn, A., Northway, M., Kolb, C., Davidovits, P., Worsnop, D.  (2006) Chemical and Microphysical Characterization of Aerosols via Aerosol Mass Spectrometry. Mass Spectrometry Reviews, 26, 185-222, DOI 10.1002/mas.20115 PDF
  10. Volkamer, R., Jimenez, J., Martini, F. S., Dzepina, K., Qi Zhang, Salcedo, D., Molina, L., Worsnop, D., and Molina, M. (2006) Secondary Organic Aerosol Formation from Anthropogenic VOCs: Rapid and Higher than Expected, Geophysical Research Letter, 33, L17811, doi:10.1029/2006GL026899 PDF and Press Release
  11. Kondo, Y., Miyazaki, Y., Takegawa, N., Miyakawa, T., Weber, R., Jimenez, J., Qi Zhang, and Worsnop, D. (2006) Oxygenated and Water-soluble Organic Aerosols in Tokyo, Journal of Geophysical Research, 112 (D01203), doi:10.1029/2006JD007056 PDF
  12. Cubison, M., Alfarra, R., Allan, J., Bower, K., Coe, H., McFiggans, G., Whitehead, P., Qi Zhang, J.L. Jimenez, J. Hopkins, and J. Lee (2006) The Characterisation of Pollution Aerosol in a Changing Photochemical Environment, Atmospheric Chemistry and Physics, 6, 5573-5588 PDF
  13. Takegawa, N., Miyakawa, T., Kondo, Y., Jimenez, J., Qi Zhang, Worsnop, D., and Fukuda, M. (2006) Seasonal and Diurnal Variations of Submicron Organic Aerosol in Tokyo Observed Using the Aerodyne Aerosol Mass Spectrometer, Journal of Geophysical Research, 111, D11206, doi:10.1029/2005JD006515 PDF
  14. Salcedo, D., T. Onasch, K. Dzepina, M. Canagaratna, Qi Zhang, J. Huffman, P. DeCarlo, J. Jayne, P. Mortimer, D. Worsnop, C. Kolb, K. Johnson, B. Zuberi, L. Marr, R. Volkamer, L. Molina, M. Molina, B. Cardenas, R. Bernabé, C. Márquez, J. Gaffney, N. Marley, A. Laskin, V. Shutthanandan, Y. Xie, W. Brune, R. Lesher, T. Shirley, and J. Jimenez. (2006) Characterization of Ambient Aerosols in Mexico City during the MCMA-2003 Campaign with Aerosol Mass Spectrometry: Results from the CENICA Supersite, Atmospheric Chemistry and Physics, 6, 925-946, SRef-ID: 1680-7324/acp/2006-6-925 PDF
  15. Qi Zhang, Worsnop, D., Canagaratna, M., and Jimenez, J. (2005) Hydrocarbon-like and Oxygenated Organic Aerosols in Pittsburgh: Insights into Sources and Processes of Organic Aerosols Atmospheric Chemistry and Physics, 5, 3289-3311 PDF
  16. Qi Zhang, Alfarra, R., Worsnop, D., Allan, J., Coe, H., Canagaratna, M., and Jimenez, J. (2005) Deconvolution and Quantification of Hydrocarbon-like and Oxygenated Organic Aerosols Based on Aerosol Mass Spectrometry.Environmental Science & Technology 39 (13), 4938-4952, doi:10.1021/es048568l PDF
    Most-Cited Articles published in 2005, http://pubs.acs.org/journals/esthag/promo/most/most_cited/2005.html.
  17. Khlystov, A., Qi Zhang, Jimenez, J., Stanier, C., Pandis, S., Canagaratna, M., Fine, P., Misra, C., and Sioutas, C. (2005) In-situ Concentration of Semi-volatile Aerosol using Water-Condensation Technology. Journal of Aerosol Science, 36, 866-880 PDF
  18. Qi Zhang, Canagaratna, M., Jayne, J., Worsnop, D. and Jimenez, J. (2005) Time and Size-Resolved Chemical Composition of Submicron Particles in Pittsburgh - Implications for Aerosol Sources and Processes. Journal of Geophysical Research 110, D07S09, doi:10.1029/2004JD004649 PDF
    Cover of JGR Special Issue on EPA Supersites
  19. Qi Zhang, Stanier, C., Canagaratna, M., Jayne, J., Worsnop, D., Pandis, S. and Jimenez, J. (2004) Insights into Nucleation Burst and Particle Growth in Pittsburgh Based on Aerosol Mass Spectrometry. Environmental Science & Technology  38(18), 4797-4809  PDF
  20. Qi Zhang and Anastasio, C. (2003) Conversion of Fog Water and Aerosol Organic Nitrogen to Ammonium, Nitrate and NOx during Exposure to Simulated Sunlight and Ozone. Environmental Science & Technology 37(16), 3522-3530 PDF
  21. Qi Zhang and Anastasio, C. (2003) Free and Combined Amino Compounds in Atmospheric Fine Particles (PM2.5) and Fog Waters from Northern California. Atmospheric Environment 37(16), 2247-2258 PDF
  22. Qi Zhang, Carroll, J. J. (III), Dixon, A. J. and Anastasio, C. (2002) Aircraft Measurements of Nitrogen and Phosphorus in and around the Tahoe Basin: Implications for Possible Sources of Atmospheric Pollutants to Lake Tahoe. Environmental Science & Technology 36(23), 4981-4989 PDF
  23. Qi Zhang, Anastasio, C., and Jimenez-Cruz, M. (2002). Water Soluble Organic Nitrogen in Atmospheric Fine Particles (PM2.5) from Northern California. Journal of Geophysical Research 107(D11), doi: 10.1029/2001JD000870 PDF
  24. Yu, Z., Qi Zhang, Kraus, T.E.C., Dahlgren, R.A., Anastasio, C. and Zasoski, R.J. (2002). Contribution of Amino Compounds to Dissolved Organic Nitrogen in Forest Soils. Biogeochemistry 61(2), 173-198 PDF
  25. Qi Zhang and Anastasio, C. (2001). Chemistry of Fog Waters in California’s Central Valley: 3. Concentrations and Speciation of Organic and Inorganic Nitrogen. Atmospheric Environment 35(32), 5629-5643 PDF
  26. Xing, B.G., Chen, L., Huang, P., Zhong, W.Q., Qi Zhang, Hu, T.D., and Tang, W.X., (1999) Structure Studies of Platinothioneins by using Extended X-ray Absorption Fine Structure Spectroscopy, Spectroscopy Letter 32(5), 883-894 Abstract
  27. Qi Zhang, Zhong, W. Q., Xin, B. G., Tang, W. X., and Chen, Y. J. (1998). Binding Properties and Stoichiometries of a Palladium (II) Complex to Metallothioneins in vivo and in vitro . Journal of Inorganic Biochemistry 72, 195-200 PDF
  28. Zhong, W. Q., Qi Zhang, Yan, Y., Yue, S., Zhang, B. L., and Tang, W. X. (1997). Interaction of Sodium Chloroplatinate and Iproplatin with Metallothionein in vivo. Journal of Inorganic Biochemistry 66, 159-164 PDF
  29. Zhong, W. Q., Qi Zhang, Yan, Y., Yue, S., Zhang, B. L., and Tang, W. X. (1997). Reaction of a Platinum (IV) Complex with Native Cd, Zn-Metallothionein in vitro. Journal of Inorganic Biochemistry 66, 179-185 PDF
  30. Zhong, W. Q., Qi Zhang, Yan, Y., Yue, S., Zhang, B. L., and Tang, W. X. (1997). Reactions of K2PtCl 6 with Metallothioneins in vitro. Journal of Inorganic Chemistry 13(2), 119-123
  31. Wu, Y. L., Zhang, Z. Y., Wang, Y., and Qi Zhang (1994). Determination of Copper, Zinc, and Tin in Canned Food by Atomic Absorption Spectrometry. Journal of Nanjing Institute of Chemical Technology (in Chinese) 16(1), 40-44
  32. Zhang, H. L., Shangguan, R. C., Ge, X., and Qi Zhang (1994). Studies of the Nature of the Surface Oxygen Species and the Catalytic Activities of V2O5 and V2O5 with the Additive Ag or Ag, Ni. Chemical Journal of Chinese Universities (in Chinese), 15(4), 592-595

 

PATENT

  1. Zhang H. L. and Qi Zhang (1997). Additives for Vinal Fiber Slurry for Nonwoven Fabrics, CN Patent 1,157,868

 

CONFERENCE PAPERS

  1. The Gordon Research Conference, September 2005, Big Sky Resort, Montana. Deconvolution and characterization of hydrocarbon-like and oxygenated organic aerosols based on aerosol mass spectrometry—Method development and insights into the sources and processes of organic aerosols in Pittsburgh (Poster; Presenter)
  2. The Gordon Research Conference, September 2005, Big Sky Resort, Montana. Field Studies of Organic Aerosols with Aerosol Mass Spectrometry (Platform; 2nd author)
  3. The European Aerosol Conference, 28 August – 3 September 2005, Ghent, Belgium. Hydrocarbon-like and oxygenated organic aerosols in multiple urban, rural, and remote atmospheres with the aerosol mass spectrometer (Platform; Presenter)
  4. The European Aerosol Conference, 28 August – 3 September 2005, Ghent, Belgium. Combining aerosol measurements for size and chemically resolved submicron aerosol with application to modeling ambient aerosol data from Pittsburgh (US) Air Quality Study (Platform; 2nd author)
  5. The European Aerosol Conference, 28 August – 3 September 2005, Ghent, Belgium. Insights into the chemistry of new particle formation and growth events in Pittsburgh based on aerosol mass spectrometry (Poster; Presenter)
  6. The European Aerosol Conference, 28 August – 3 September 2005, Ghent, Belgium. Deconvolution and characterization of hydrocarbon-like and oxygenated organic aerosols in Pittsburgh based on aerosol mass spectrometry. (Platform; 2nd author)
  7. The European Aerosol Conference, 28 August – 3 September 2005, Ghent, Belgium. Size, time and composition-resolved aerosol measurements in Mexico City during the MCMA-2003 field campaign: The organic component. (Platform; 2nd author)
  8. The European Aerosol Conference, 28 August – 3 September 2005, Ghent, Belgium. Application of aerosol mass spectrometry to the chemical and microphysical characterization of ambient aerosols (Poster; 6th author)
  9. AAAR International Specialty Conference: Particulate Matter Supersites Program and Related Studies, February 2005. Insights into the Chemistry of New Particle Formation and Growth Events in Pittsburgh Based on Aerosol Mass Spectrometry. (Platform; Presenter)
  10. AAAR International Specialty Conference: Particulate Matter Supersites Program and Related Studies, February 2005. Characteristics of Primary and Oxygenated Organic Aerosols in Multiple Urban, Rural, and Remote Atmospheres. (Platform; Presenter)
  11. AAAR International Specialty Conference: Particulate Matter Supersites Program and Related Studies, February 2005.  Deconvolution and Quantification of Hydrocarbon-like and Oxygenated Organic Aerosols Based on Aerosol Mass Spectrometry. (Poster; Presenter)
  12. AAAR International Specialty Conference: Particulate Matter Supersites Program and Related Studies, February 2005.  Time and Size-Resolved Chemical Composition of Submicron Particles in Pittsburgh – Implications for Aerosol Sources and Processes. (Poster; Presenter)
  13. AAAR International Specialty Conference: Particulate Matter Supersites Program and Related Studies, February 2005.  An AAAR International Specialty Conference. In-Situ Concentration of Semi-Volatile Aerosol Using Water Condensation Technology. (Poster; 2nd author)
  14. AAAR International Specialty Conference: Particulate Matter Supersites Program and Related Studies, February 2005.  Particle Density and Shape Factors Estimated from Merging Aerodynamic and Mobility Size Distributions. (Poster; 2nd author)
  15. AAAR International Specialty Conference: Particulate Matter Supersites Program and Related Studies, February 2005.  Synthesis of Research on New Particle Formation and Growth at the Pittsburgh Air Quality Study. (Platform; 4th author)
  16. American Geophysical Union, Fall meeting, December 2004. Deconvolution and Quantification of Primary and Oxygenated Organic Aerosols: Technique Development and Applications to the Pittsburgh AMS Datasets. (Platform; Presenter)
  17. American Geophysical Union, Fall meeting, December 2004. Concentrations, Time Variations, Size Distributions, and Mass Spectra of Primary and Oxygenated Organic Aerosols at Multiple Urban, Rural, and Remote Locations. (Platform; 2nd author)
  18. American Geophysical Union, Fall meeting, December 2004. Overview of Measurements of Particle Emissions and Ambient Concentrations in Mexico City during the MCMA-2003 Field Campaign. (Platform; 3rd author)
  19. American Geophysical Union, Fall meeting, December 2004. Characterizing Particle Morphology and Density by Combining Aerosol Measurements with Application to Modeling Ambient Aerosol Data from Pittsburgh Air Quality Study (2002) and ICARTT-2004. (Poster; 2nd author)
  20. American Geophysical Union, Fall meeting, December 2004. Size, Time, and Composition-Resolved Aerosol Measurements in Mexico City during the MCMA-2003 Field Campaign: The Organic Component. (Poster; 3rd author)
  21. American Association of Aerosol Research, 23rd  annual meeting, October 2004. A new technique for estimating the primary and oxygenated organic aerosol mass concentrations and size distributions with high time resolution based on aerosol mass spectrometry. (Platform; presenter)
  22. American Association of Aerosol Research, 23rd  annual meeting, October 2004. Characterizing particle morphology and density by combining mobility and aerodynamic diameter measurements with application to Pittsburgh Supersite data. (Platform; 2nd author)
  23. American Association of Aerosol Research, 23rd  annual meeting, October 2004. Concentrations, time variations, size distributions, and mass spectra of estimated primary and oxygenated aerosols in multiple urban, rural, and remote locations from AMS data. (Platform; 2nd author)
  24. American Association of Aerosol Research, 23rd  annual meeting, October 2004. In-situ concentration 9of semi-volatile aerosol using water condensation technology. (Poster; 2nd author)
  25. American Association of Aerosol Research, 23rd  annual meeting, October 2004. Fast size-resolved aerosol composition measurements in Mexico City with an AMS. (Platform; 3rd author)
  26. American Association of Aerosol Research, 23rd  annual meeting, October 2004. Measurements of ambient aerosol composition using an Aerodyne Aerosol Mass Spectrometer in New York City: winter 2004 intensive study. (Poster; 7th author)
  27. Transport and Air Pollution 13th International Scientific Symposium, September 2004. Quantitative Estimates of Primary and Oxygenated Organic Aerosol Mass Concentrations and Size Distributions with 5-min Time Resolution: Pittsburgh vs. Mexico City. (Platform; presenter)
  28. American Geophysical Union, Fall meeting, December 2003. Insights into Particle Characteristics, Sources, Nucleation and Growth in Pittsburgh Based on Aerosol Mass Spectrometry. (Platform; presenter)
  29. American Geophysical Union, Fall meeting, December 2003. A Detailed Study of the Chemistry and Mechanisms of Particle Growth during Nucleation Events in a Polluted Urban Area. (Poster; presenter)
  30. American Geophysical Union, Fall meeting, December 2003. Organic Nitrogen in Atmospheric Drops and Particles: Concentrations, (Limited) Speciation, and Chemical Transformations  (Poster; 2nd author)
  31. American Association of Aerosol Research, 22nd annual meeting, October 2003. Free and Combined Amino Compounds in Atmospheric Fine Particles (PM2.5) and Fog Waters from Northern California. (Platform; presenter)
  32. American Association of Aerosol Research, 22nd annual meeting, October 2003. Insights on Nucleation Burst and Nuclei Growth during Particle Nucleation in Pittsburgh from Aerosol Mass Spectrometry. (Platform; presenter)
  33. American Association of Aerosol Research, 22nd annual meeting, October 2003. Size-Resolved Chemical Composition of Fine Particles in Pittsburgh Measured with an Aerodyne Aerosol Mass Spectrometer. (Poster; presenter)
  34. American Association of Aerosol Research, 22nd annual meeting, October 2003. Deriving Chemically and size-resolved Number and Mass Distributions from simultaneous Aerodyne AMS and SMPS ambient data. (Poster; 2nd author)
  35. American Association of Aerosol Research, 22nd annual meeting, October 2003. Formation of Inorganic Nitrogen from Illumination of Bulk Organic Nitrogen in Atmospheric Fine Particles and Fog Drops. (Platform; 2nd author)
  36. American Association of Aerosol Research, 22nd annual meeting, October 2003. Synthesis of Research on in-situ Particle Nucleation in Western Pennsylvania: Which Hypotheses for Nuclei Formation and Growth Are Consistent with Field Observations, Mass Spectrometry, and Modeling? (Platform; 4th author)
  37. American Association of Aerosol Research, 22nd annual meeting, October 2003. Size, Time, and Composition-Resolved Aerosol Measurements in Mexico City during the MCMA-2003 Field Campaign. (Poster; 5th author)
  38. American Association of Aerosol Research, 22nd annual meeting, October 2003. Measurement of Particulate Organics in Mexico City Using an Aerosol Mass Spectrometer. (Poster; 6th author)
  39. Gordon Research Conference on Atmospheric Chemistry, September 2003. Particle Characteristics, Sources, Nucleation and Growth in Pittsburgh Based on Aerosol Mass Spectrometry. (Poster; presenter)
  40. Gordon Research Conference on Atmospheric Chemistry, September 2003. Size, Time, and Composition-Resolved Aerosol Measurements in Mexico City during the MCMA-2003 Field Campaign. (Poster; 5th author)
  41. Gordon Research Conference on Atmospheric Chemistry, September 2003. Conversion of Organic Nitrogen to Inorganic Forms in Atmospheric Particles and Drops. (Poster; 2nd author)
  42. Atmospheric Chemistry Colloquium for Emerging Senior Scientists (ACCESS VII), September 2003. Insights into Particle Growth during Nucleation Events in Pittsburgh Based on Aerosol Mass Spectrometry. (Platform; presenter)
  43. American Association of Aerosol Research, 21st annual meeting, October 2002. Size-resolved chemical composition of fine particulate matter at the Pittsburgh Supersite. (Poster; 4th author)
  44. Lake Tahoe Higher Education & Research Symposium, May 2002. Aircraft Measurements of Nitrogen and Phosphorus in and around the Lake Tahoe Basin. (Platform; 2nd author)
  45. American Geophysical Union, Fall meeting, December 2001. Aircraft Measurements of Gaseous and Fine Particulate Nitrogen over the Sierra Foothills and in the Tahoe Basin. (Poster; presenter)
  46. American Association of Aerosol Research, 20th annual meeting, October 2001. Concentrations and Speciation of Organic Nitrogen in Atmospheric Fine Particles and Fog Waters.  (Platform; presenter)
  47. American Association of Aerosol Research, 20th annual meeting, October 2001. Sunlight-Initiated Transformations of Organic Nitrogen in Fog Drops. (Platform; 2nd author)
  48. American Geophysical Union, Fall meeting, December 2000. Formation of Inorganic Nitrogen From Dissolved Organic Nitrogen in Fog Waters. (Poster; presenter)
  49. American Chemical Society, Environmental Chemistry Division, March 2000. Concentrations and Chemistry of Organic Nitrogen in Fine Particles and Fog Drops from Davis, CA. (Platform; 2nd author)
  50. American Geophysical Union, Fall meeting, December 1999. Characterization and Photochemical Oxidation of Organic Nitrogen in Fine Particles and Fog Waters from Northern California. (Poster; presenter)
  51. Soil Science Society of America, 91th Annual Meeting, October ~ November, 1999. Contribution of Amino Acids and Proteins to Dissolved Organic Nitrogen in Forest Floor Leachates. (Poster; 2nd author)
  52. National Atmospheric Deposition Program (NADP) Technical Committee Meeting, October 1999. Organic and Inorganic Nitrogen in Fog Waters and Particulate Matter. (Platform; 2nd author)
  53. International Congress on Ecosystem Health, August 1999. Photochemical Transformations of Atmospheric Organic Nitrogen: Implications for the Bioavailability of N in Atmospheric Deposition. (Poster; presenter)
  54. American Geophysical Union, Fall meeting, December 1998. Photo-Destruction of Amino Acids in Northern California Fog Waters. (Poster; 2nd author)
  55. 4th International Symposium on Applied Bioinorganic Chemistry, April 1997. Interaction of Some Pt(II) and Pt(IV) Complexes with Metallothionein in vivo and in vitro. (Platform; 2nd author)

 

Last updated 23 June, 2008