Kos, Gregor - Concordia University - Department of Chemistry & Biochemistry

个人简介

Postdoctoral studies (2003-2007), McGill University, Montreal, QC (Prof. Parisa Ariya) PhD (2003), Vienna University of Technology, Vienna, Austria (Prof. Rudolf Krska) Visiting scientist (2001), University of Idaho, Moscow, ID (Prof. Peter Griffiths) MSc (2000), Vienna University of Technology, Vienna, Austria MSc research (1999-2000), University of Plymouth, Plymouth, UK (Prof. Paul Worsfold)

研究领域

I am an environmental analytical scientist with a strong background in statistical analysis of observational data. I also employ molecular modelling to understand tropospheric photochemical reactions, especially in an urban air quality context. I have significant field experience in developing and deploying analytical instrumentation in the High Arctic. Currently, I am interested in statistical analysis of medium sized data sets (up to 500,000 observations), including multivariate data analysis of partially dichotomous data. I am very much interested interpreting measurement data for the application and validation of atmospheric chemistry models. My main statistical tools for data analysis are Matlab and R. I use the CAABA/MECCA box model for atmospheric molecular modelling. My current research focuses on long-term observations of urban pollutants in major Canadian cities. The research is comprised of statistical analysis of 1o year pollution data and atmospheric modelling using the box model MECCA/CAABA and multivariate chemometric modelling in Matlab and R. Until recently, I was a collaborator on the EU funded FP7 MYCOSPEC project, where I perform multivariate modelling of mid-infrared data for classification of contaminated agricultural commodities. I have recently explored non-parametric machine learning algorithms such as bagged decision trees. Previously, I was a lead author and chapter coordinator for the Canadian Mercury Science Assessment for the "Emissions" Chapter. I have also conducted a statistical evaluation of gaseous and reactive mercury species data from observations and model results. All mercury work was done in collaboration with Environment Canada. During field studies in the High Arctic (in Alert, NU and Barrow, AK), I investigated the exchange of volatile organic compounds between snow and air using GC-FID and GC-MS.

近期论文

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P. Kovalsky, G. Kos, K. Nährer, C. Schwab, T. Jenkins, G. Schatzmayr, M. Sulyok, R. Krska, Co-occurrence of Regulated, Masked and Emerging Mycotoxins and Secondary Metabolites in Finished Feed and Maize – an Extensive Survey, Toxins 8 (2016) 363, doi: 10.3390/toxins8120363 M. Sieger, G. Kos, M. Sulyok, M. Godejohann, R. Krska, B. Mizaikoff, MYCOSPEC: Harnessing Infrared Laser Spectroscopy for On-site Mycotoxin Analysis, Scientific Reports (2016), under revision G. Kos, M. Sieger, D. McMullin, C. Zahradnik, T. Öner, B. Mizaikoff, R. Krska, A Novel Chemometric Classification for FTIR Spectra of Mycotoxin-contaminated Maize and Peanuts at Regulatory Limits, Food Additives and Contaminants, Part A 33 (2016), 1596-1607, doi: 10.1080/19440049.2016.1217567 Y. Nazarenko, R.B. Rangel-Alvarado, G. Kos, U. Kurien, P.A. Ariya, Novel Aerosol Analysis Approach for Characterization of Nanoparticulate Matter in Snow, Environmental Science and Pollution Research (2016), in press G. Kos, Y.-F. Li, D. Niemi, M. King, S.A. Smyth, C. Zdanowicz, J. Zheng, Releases of Mercury into Air and Water from Anthropogenic Activities in North America, in A. Steffen (ed.), Canadian Mercury Science Assessment (2016), isbn: 978-0-660-03315-0 P.A. Ariya, M. Amyot, A. Dastoor, D.A. Deeds, M. Subir, A. Feinberg, G. Kos, A. Poulain, A. Ryjkov, K. Semeniuk, K. Toyota, Mercury Physicochemical and Biogeochemical Transformation in the Atmosphere and at Atmospheric Interfaces: A Review, Chemical Reviews 115 (2015) 3760-3802, doi: 10.1021/cr500667e G. Kos, V. Kanthasamy, N. Adechina, P.A. Ariya, Volatile organic compounds in Arctic snow: Concentrations and implications for atmospheric processes, Environmental Science: Processes & Impacts 16 (2014) 2592-2603, doi: 10.1039/C4EM00410H P.A. Ariya, G. Kos, R. Mortazavi, E.D. Hudson, V. Kanthasamy, N. Eltouny, J. Sun and C. Wilde, Bio-Organic Materials in the Atmosphere and Snow: Measurement and Characterization, in V.F. McNeill, P.A. Ariya (eds.), Atmospheric and Aerosol Chemistry, ISBN 978-3-642-41214-1, Springer, NY (2013). doi:10.1007/128_2013_461 G. Kos, A. Ryzhkov, A. Dastoor, J. Narayan, A. Steffen, P. A. Ariya, L. Zhang,Evaluation of Discrepancy between Measured and Modeled Oxidized Mercury Species,Atmospheric Chemistry & Physics 13 (2013) 4839-4863, doi:10.5194/acp-13-4839-2013. D. Voisin, J.-L. Jaffrezo, S. Houdier, M. Barret, J. Cozic, M. King, J. France, H. Reay, A. Grannas , G. Kos , P. A. Ariya , H. Beine , F. Domine, Carbonaceous Species and HUmic LIke Substances (HULIS) in Arctic Snowpack During OASIS Field Campaign in Barrow, Journal of Geophysical Research-Atmospheres 117 (2012) D00R19, doi:10.1029/2011JD016612. P. A. Ariya, F. Domine, G. Kos, M. Amyot, V. Cote, H. Vali, T. Lauzier, L. Legagneux, W. F. Kuhs, K. Techmer, T. Heinrichs, R. Mortazavi, J. Bottenheim, Snow: A Photo-Bio-Chemical Exchange Platform with the Atmosphere, Environmental Chemistry8 (2011) 62-73, doi:10.1071/EN10056. G. Kos, P. A. Ariya, Volatile Organic Compounds in Snow from Mont Saint Hilaire and the Tremblant Areas in South-Western Quebec, Journal of Geophysical Research – Atmospheres 115 (2010) D01302, doi:10.1029/2009JD012391. P. A. Ariya, J. Sun, N. A. Eltouny, E. D. Hudson, C. T. Hayes and G. Kos, Physical and Chemical Characterization of Bioaerosols – Implications for Nucleation processes,International Reviews in Physical Chemistry 28 (2009) 1-32, doi:10.1080/01442350802597438. V. Cote, G. Kos, R. Mortazavi, P. A. Ariya, Microbial and “de novo” Transformation of Dicarboxylic Acids by Three Airborne Fungi, Science of the Total Environment340 (2008) 530-537, doi:10.1016/j.scitotenv.2007.10.035. G. Kos, H. Lohninger, R. Krska, Optimisation of the Sample Preparation Procedure for the Rapid Screening of Fungal Infection on Corn Using Mid-infrared Attenuated Total Reflection Spectroscopy (ATR), Food Additives and Contaminants, 24 (2006) 721-729, doi:10.1080/02652030601186111. G.Kos, P. A. Ariya, Determination of Wide Range Volatile Organic Compounds in Snow Using Solid Phase Micro-Extraction (SPME), Analytical and Bioanalytical Chemistry, 385 (2006) 57-66, doi:10.1007/s00216-006-0333-5. J. Stroka, M. Spanjer, S. Buechler, S. Barel, G.Kos, E. Anklam, Novel Sampling Methods for the Analysis of Mycotoxins and the Combination with Spectroscopic Methods for the Rapid Evaluation of Deoxynivalenol Contamination, Toxicology Letters 153, 1 (2004) 99-107, doi:10.1016/j.toxlet.2004.04.039. G. Kos, H. Lohninger, R. Krska, P. Griffiths, Rapid Screening of Fungal Infection on Corn using Mid-infrared Diffuse Reflection Spectroscopy (DRS) and Attenuated Total Reflection Spectroscopy (ATR): A Comparison Study, Analytical and Bioanalytical Chemistry 378 (2004) 159-166, doi:10.1007/s00216-003-2245-y. G. Kos, H. Lohninger, R. Krska, Validation of Chemometric Models for the Determination of Deoxynivalenol on Maize by Mid-Infrared Spectroscopy, Mycotoxin Research 19, 2 (2004) 149-153, doi:10.1007/BF02942955. G. Kos, H. Lohninger, R. Krska, Development of a Novel Rapid Method for the Determination of Fusarium Fungi on Corn using Mid-infrared Spectroscopy with Attenuated Total Reflection (FTIR-ATR) and Chemometrics, Analytical Chemistry75 (2003) 1211-1217, doi:10.1021/ac0260903. G. Kos, H. Lohninger, R. Krska, Fourier Transform Mid-infrared Spectroscopy with Attenuated Total Reflection (FT-IR/ATR) as a Tool for the Detection of Fusarium Fungi on Maize, Vibrational Spectroscopy 29 (2002) 115-119, doi:10.1016/S0924-2031(01)00196-5. G. Kos, H. Lohninger, R. Krska, Classification of Maize Contaminated with Fusarium Graminearum Using Mid-infrared Spectroscopy and Chemometrics, Mycotoxin Research, 18, S1 (2002) 104-108, doi:10.1007/BF02946074. G. Kos, H. Lohninger, R. Krska, Using Mid-Infrared Fourier-Transform-Spectroscopy with Attenuated Total Reflection (FT-IR/ATR) as a tool for the determination of Fusarium Graminearum on Maize, Mycotoxin Research, 17A, 1 (2001) 102-106, doi:10.1007/BF03036722.