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1. Wang, Y., Puthussery, J.V., Yu, H. Verma, V. Synergistic and Antagonistic Interactions between the Organic and Metallic Components of the Ambient Particulate Matter (PM) for the Cytotoxicity measured by Chinese Hamster Ovary Cells, Science of Total Environment, doi: 10.1016/j.scitotenv.2020.139511.

2. Puthussery, J.V., Singh, A., Rai, P., Bhattu, D., Kumar, V., Vats, P., Furger, M., Rastogi, N., Slowik, J.G., Ganguly, D., Prevot, A.S.H, Tripathi, S.N., Verma, V. Real-Time Measurements of PM2.5 Oxidative Potential using Dithiothreitol (DTT) Assay in Delhi, India, Environmental Science and Technology Letters, doi: 10.1021/acs.estlett.0c00342.

3. Yu, H, Puthussery, J.V., Verma, V., 2019. A semi-automated multi-endpoint reactive oxygen species activity analyzer (SAMERA) for measuring the oxidative potential of ambient PM2.5 aqueous extracts, Aerosol Science and Technology, 54 (3), 304320.

4. Wei, J., Yu, H., Wang, Y., & Verma, V. (2018). Complexation of Iron and Copper in Ambient Particulate Matter and Its Effect on the Oxidative Potential Measured in a Surrogate Lung Fluid. Environmental science & technology, 53(3), 1661-1671.

5. Bates, J.T., Weber, R.J., Verma, V., Fang, T., Ivey, C., Liu, C., Sarnat, S.E., Chang, H.H., Mulholland, J.A. and Russell, A. (2018). Source impact modeling of spatiotemporal trends in PM2. 5 oxidative potential across the eastern United States. Atmospheric Environment, 193, pp.158-167.

6. Puthussery, J. V., Zhang, C., & Verma, V. (2018). Development and field testing of an online instrument for measuring the real-time oxidative potential of ambient particulate matter based on dithiothreitol assay. Atmospheric Measurement Techniques, 11(10), 5767-5780.

7. Wang, Y., Mukherjee, U. K., Plewa, M. J., and Verma, V., 2018. Assessing the cytotoxicity of ambient particulate matter using Chinese hamster ovary (CHO) cells and its relationship with the chemical composition and oxidative potential, Atmospheric Environment: DOI: 10.1016/j.atmosenv.2018.02.025.

8. Yu, H., Jinlai, W., Cheng, Y., Subedi, K., and Verma, V., 2018. Synergistic and antagonistic interactions among the particulate matter components in generating reactive oxygen species, Environmental Science and Technology: DOI: 10.1021/acs.est.7b04261.

9. Abrams, J. Y., Weber, R. J., Klein, M., Samat, S. E., Chang, H. H., Strickland, M. J., Verma, V., Fang, T., Bates, J. T., Mulholland, J. A., Russell, A. G., and Tolbert, P. E., 2017. Associations between ambient fine particulate oxidative potential and cardiorespiratory emergency department visits, Environmental Health Perspectives, 125 (10), 107008-1-107008-9.

10. Vreeland, H., Weber, R., Bergin, M., Greenwald, R., Golan, R., Russell, A.G., Verma, V. and Sarnat, J.A. (2017). Oxidative potential of PM2. 5 during Atlanta rush hour: Measurements of in-vehicle dithiothreitol (DTT) activity. Atmospheric Environment, 165, pp.169-178.

11. Shirmohammadi, F., Lovett, C., Sowlat, M.H., Mousavi, A., Verma, V., Shafer, M.M., Schauer, J.J. and Sioutas, C. (2017). Chemical composition and redox activity of PM0. 25 near Los Angeles International Airport and comparisons to an urban traffic site. The Science of the Total Environment, 610, p.1336-1346.

12. Gao, D., Fang, T., Verma, V., Zeng, L., & Weber, R. J. (2017). A method for measuring total aerosol oxidative potential (OP) with the dithiothreitol (DTT) assay and comparisons between an urban and roadside site of water-soluble and total OP. Atmospheric Measurement Techniques, 10(8), 2821-2835.

13. Xiong, Q., Yu, H., Wang, R., Wei, J., & Verma, V. (2017). Rethinking Dithiothreitol-Based Particulate Matter Oxidative Potential: Measuring Dithiothreitol Consumption versus Reactive Oxygen Species Generation. Environmental Science & Technology, 51(11), 6507-6514.

14. Fang, T., Zeng, L., Gao, D., Verma, V., Stefaniak, A. B., & Weber, R. J. (2017). Ambient Size Distributions and Lung Deposition of Aerosol Dithiothreitol-Measured Oxidative Potential: A Contrast Between Soluble and Insoluble Particles. Environmental Science & Technology, 51 (12), 6802–6811

15. Fang, T., Guo, H., Zeng, L., Verma, V., Nenes, A., & Weber, R. J. (2017). Highly Acidic Ambient Particles, Soluble Metals, and Oxidative Potential: A Link between Sulfate and Aerosol Toxicity. Environmental Science & Technology, 51(5), 2611-2620.

16. Shirmohammadi, F., Wang, D., Hasheminassab, S., Verma, V., Schauer, J.J., Sioutas, C. Oxidative potential of on-road fine particulate matter (PM 2.5) measured on major freeways of Los Angeles, CA, and a 10-year comparison with earlier roadside studies. Atmospheric Environment, 148 (2016), 102-114.

17. Tuet, W., Foka,S., Verma, V., Rodriguez, M., Grosberg, A., Champion, J.,Ng, N.L. Dose-dependent intracellular reactive oxygen and nitrogen species (ROS/RNS) production from particulate matter exposure: comparison to oxidative potential and chemical composition, Atmospheric Environment 144 (2016) 335-344.

18. Vreeland, H., Schauer, J.J., Russell, A.G., Marshall, J.D., Fushimi, A., Jain, G., Sethuraman, K., Verma, V., Tripathi, S.N., Bergin, M.H., Chemical characterization and toxicity of particulate matter emissions from roadside trash combustion in urban India, Atmospheric Environment 147 (2016) 22-30.

19. Fang, T., Verma, V., Bates, J., Abrams, J., Weber, R.J., 2015 PM 2.5 water-soluble elements in the southeastern United States: automated analytical method development, spatiotemporal distributions, source apportionment, and implications for heath studies, Chem. Phys., 15, 11667-11682, 2015.

20. Bates, J. T. Bates, Weber, R. J., Abrams, J., Verma, V., Klein, M., Matthew Strickland, Sarnat, S., Fang, T., Chang, H., Mulholland, J., Tolbert, P., Russell, A. Vehicle and Biomass Burning Particulate Emissions Linked to Adverse Respiratory and Cardiovascular Health Effects via Generation of Reactive Oxygen Species, Environmental Science and Technology, DOI: 10.1021/acs.est.5b02967.

21. Fang, T., Verma, V., Bates, J.T., Abrams, J., Klein, M., Strickland, M.J., Sarnat, S.E. Chang, H.H., Mulholland, J., Tolbert, P.E., Russell, A.G., Weber, R.J., Oxidative potential of ambient water-soluble PM2.5 measured by Dithiothreitol (DTT) and Ascorbic Acid (AA) assays in the southeastern United States: contrasts in sources and health associations, Atmospheric Chemistry and Physics, 16 (6), 3865-3879, 2016.

22. Verma, V., Wang, Y., El-Afifi, R., Fang, T., Russell, A.J., Weber, R.J., Fractionating Ambient Humic-like Substances (HULIS) for their reactive oxygen species activity – Assessing the importance of quinones and atmospheric aging on particulate matter toxicity, Atmospheric Environment, Volume 120, November 2015, Pages 351–359.

23. Verma, V., Fang, T., Lu, X., Nga, N. L., Peltier, R., Russell, A.J., Weber, R.J., (2015). Organic aerosols associated with Reactive Oxygen Species (ROS) generation, Environmental Science and Technology, 49 (7), 4646–4656.

24. Verma, V., Fang, T., Guo, H., King, L., Edgerton, E., Peltier, R., Russell, A.J., Weber, R.J., (2014). Reactive Oxygen Species Associated with Water-Soluble PM5 in the Southeastern United States – Spatiotemporal Trends and Source Apportionment, Atmospheric Chemistry and Physics, 14, 12915–12930.

25. Fang, T., Verma, V., Guo, H., King, L. E., Edgerton, E. S., and Weber, R. J., 2014. A Semi-automated System for Quantifying the Oxidative Potential of Ambient Particles in Aqueous Extracts Using the dithiothreitol (DTT) assay: Results from the Southeastern Center for Air Pollution and Epidemiology (SCAPE), Meas. Tech., 8, 471-482, 2015.

26. Budisulistiorini, S.H., Canagaratna, M.R., Croteau, P.L., Baumann, K., Edgerton, E.S., Kollman, M.S., Ng, N.L., Verma, V., Shaw, S.L., Knipping, E.M., Worsnop, D.R., Jayne, J.T., Weber, R.J., Surratt, J.D., 2014. Intercomparison of an Aerosol Chemical Speciation Monitor (ACSM) with Ambient Fine Aerosol Measurements in Downtown Atlanta, Georgia, Atmospheric Measurement Technique, 7, 1929-1941.

27. Verma, V., Rico-Martinez, R., Kotra, N., Rennolds, C., King, L., Liu, J., Snell, T., Weber, R.J., 2013. Estimating the toxicity of ambient fine aerosols using freshwater rotifer Brachionus calyciflorus (Rotifera: Monogononta), Environmental Pollution, 182, 379–384.

28. Verma, V., Rico-Martinez, R., Kotra, N., King, L., Liu, J., Snell, T., Weber, R.J., 2012. Contribution of water-soluble and insoluble species and their hydrophobic/hydrophilic sub-fractions in the ROS generating potential of ambient atmospheric aerosols. Environmental Science and Technology, 46 (20), 11384–11392.

29. Verma, V., Pakbin, P., Cheung, K.L., Cho, A.K., Schauer, J.J, Shafer, M.M, Kleinman, M.T., and Sioutas, C., 2010. Physicochemical and oxidative characteristics of semi-volatile components of quasi-ultrafine particles in an urban atmosphere. Atmospheric Environment, 45 (4), 1025-1033.

30. Verma, V., Shafer, M.M., Schauer, J.J. and Sioutas, C., 2010. Contribution of transition metals in the reactive oxygen species activity of PM emissions from retrofitted heavy-duty vehicles. Atmospheric Environment, 44 (39), 5165-5173.

31. Moore, K.F., Verma, V., Minguillon, M.C., Sioutas, C., 2010. Inter- and intra-community variability in continuous coarse particulate matter (PM10-2.5) concentrations in the Los Angeles area. Aerosol Science and Technology, 44 (7), 526-540.

32. Verma, V., Ning, Z., Cho, A.K., Schauer, J.J., Shafer, M.M., Sioutas, C., 2009. Redox activity of urban quasi-ultrafine particles from primary and secondary sources. Atmospheric Environment, 43 (40), 6360-6368.

33. Biswas, S., Verma, V., Schauer, J.J., Cassee, F.R., Cho, A.K., Sioutas, C., 2009. Oxidative potential of semi-volatile and non-volatile particulate matter (PM) from heavy-duty vehicles retrofitted with emission control technologies. Environmental Science & Technology, 43 (10), 3905-3912.

34. Verma, V., Polidori, A., Schauer, J.J., Shafer, M.M., Cassee, F.R., Sioutas, C., 2009. Physicochemical and toxicological profiles of particulate matter in Los Angeles during the October 2007 southern California wildfires. Environmental Science & Technology, 43 (3), 954-960.

35. Biswas, S., Verma, V., Schauer, J.J., Sioutas, C., 2009. Chemical speciation of PM emissions from heavy-duty diesel vehicles equipped with diesel particulate filter (DPF) and selective catalytic reduction (SCR) retrofits. Atmospheric Environment, 43 (11), 1917-1925.

36. Biswas, S., Hu, S.H., Verma, V., Herner, J.D., Robertson, W.H., Ayala, A., Sioutas, C., 2008. Physical properties of particulate matter (PM) from late model heavy-duty diesel vehicles operating with advanced PM and NOx emission control technologies. Atmospheric Environment, 42 (22), 5622-5634.