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Scott A. Fruin, PhD
Research Assistant Professor of Preventive Medicine (Part Time)
Environmental Health
SSB 225F 2001 N. Soto Street Health Sciences Campus Los Angeles
+1 323 442 2870


Scott Fruin is Assistant Professor in Preventive Medicine, in the Division of Environmental Health. His research focuses on air pollution exposure assessment and includes field measurements in support of population-based, longitudinal health studies. Of particular interest to Dr. Fruin is better characterization of high exposure environments such as in-vehicle, near-vehicle and near-roadway environments, and the use of mobile approaches to map spatial differences in pollution. Recently, he has been measuring neighborhood exposures near the ports of Los Angeles and Long Beach. Dr. Fruin is also interested in strengthening the links between pollution measurements and health outcomes, such as adapting bioassay measurements of the biological activity of particulate matter for comparison to chronic health effects, including asthma and reduced rates of lung growth.


Deng Y, Chen C, Xian X, Tsow F, Verma G, McConnell R, Fruin S, Tao N, Forzani ES. A Novel Wireless Wearable Volatile Organic Compound (VOC) Monitoring Device with Disposable Sensors. Sensors (Basel). 2016 Dec 03; 16(12). View in: PubMed

Hudda N, Fruin SA. International Airport Impacts to Air Quality: Size and Related Properties of Large Increases in Ultrafine Particle Number Concentrations. Environ Sci Technol. 2016 Apr 5; 50(7):3362-70. View in: PubMed

Wu W, Muller R, Berhane K, Fruin S, Liu F, Jaspers I, Diaz-Sanchez D, Peden DB, McConnell R. Inflammatory response of monocytes to ambient particles varies by highway proximity. Am J Respir Cell Mol Biol. 2014 Dec; 51(6):802-9. View in: PubMed

Hudda N, Gould T, Hartin K, Larson TV, Fruin SA. Emissions from an International Airport Increase Particle Number Concentrations 4-fold at 10 km Downwind. Environ Sci Technol. 2014 Jun 17; 48(12):6628-35. View in: PubMed

Hudda N, Fruin SA. Models for predicting the ratio of particulate pollutant concentrations inside vehicles to roadways. Environ Sci Technol. 2013 Oct 1; 47(19):11048-55. View in: PubMed

Li L, Wu J, Hudda N, Sioutas C, Fruin SA, Delfino RJ. Modeling the concentrations of on-road air pollutants in southern California. Environ Sci Technol. 2013 Aug 20; 47(16):9291-9. View in: PubMed

McConnell R, Wu W, Berhane K, Liu F, Verma G, Peden D, Diaz-Sanchez D, Fruin S. Inflammatory cytokine response to ambient particles varies due to field collection procedures. Am J Respir Cell Mol Biol. 2013 Apr; 48(4):497-502. View in: PubMed

Both AF, Westerdahl D, Fruin S, Haryanto B, Marshall JD. Exposure to carbon monoxide, fine particle mass, and ultrafine particle number in Jakarta, Indonesia: effect of commute mode. Sci Total Environ. 2013 Jan 15; 443:965-72. View in: PubMed

Wu W, Peden DB, McConnell R, Fruin S, Diaz-Sanchez D. Glutathione-S-transferase M1 regulation of diesel exhaust particle-induced pro-inflammatory mediator expression in normal human bronchial epithelial cells. Part Fibre Toxicol. 2012; 9:31. View in: PubMed

Hudda N, Kostenidou E, Sioutas C, Delfino RJ, Fruin SA. Vehicle and driving characteristics that influence in-cabin particle number concentrations. Environ Sci Technol. 2011 Oct 15; 45(20):8691-7. View in: PubMed

Park SS, Kozawa K, Fruin S, Mara S, Hsu YK, Jakober C, Winer A, Herner J. Emission Factors for High-Emitting Vehicles Based on On-Road Measurements of Individual Vehicle Exhaust with a Mobile Measurement Platform. J Air Waste Manag Assoc. 2011 Oct; 61(10):1046-1056. View in: PubMed

Park SS, Kozawa K, Fruin S, Mara S, Hsu YK, Jakober C, Winer A, Herner J. Emission factors for high-emitting vehicles based on on-road measurements of individual vehicle exhaust with a mobile measurement platform. J Air Waste Manag Assoc. 2011 Oct; 61(10):1046-56. View in: PubMed

de Nazelle A, Nieuwenhuijsen MJ, Antó JM, Brauer M, Briggs D, Braun-Fahrlander C, Cavill N, Cooper AR, Desqueyroux H, Fruin S, Hoek G, Panis LI, Janssen N, Jerrett M, Joffe M, Andersen ZJ, van Kempen E, Kingham S, Kubesch N, Leyden KM, Marshall JD, Matamala J, Mellios G, Mendez M, Nassif H, Ogilvie D, Peiró R, Pérez K, Rabl A, Ragettli M, Rodríguez D, Rojas D, Ruiz P, Sallis JF, Terwoert J, Toussaint JF, Tuomisto J, Zuurbier M, Lebret E. Improving health through policies that promote active travel: a review of evidence to support integrated health impact assessment. Environ Int. 2011 May; 37(4):766-77. View in: PubMed

Fruin SA, Hudda N, Sioutas C, Delfino RJ. Predictive model for vehicle air exchange rates based on a large, representative sample. Environ Sci Technol. 2011 Apr 15; 45(8):3569-75. View in: PubMed

Hu S, Fruin S, Kozawa K, Mara S, Winer AM, Paulson SE. Aircraft emission impacts in a neighborhood adjacent to a general aviation airport in southern California. Environ Sci Technol. 2009 Nov 1; 43(21):8039-45. View in: PubMed

Behrentz E, Sabin LD, Winer AM, Fitz DR, Pankratz DV, Colome SD, Fruin SA. Relative importance of school bus-related microenvironments to children's pollutant exposure. J Air Waste Manag Assoc. 2005 Oct; 55(10):1418-30. View in: PubMed

Sabin LD, Behrentz E, Winer AM, Jeong S, Fitz DR, Pankratz DV, Colome SD, Fruin SA. Characterizing the range of children's air pollutant exposure during school bus commutes. J Expo Anal Environ Epidemiol. 2005 Sep; 15(5):377-87. View in: PubMed

Ritz B, Yu F, Fruin S, Chapa G, Shaw GM, Harris JA. Ambient air pollution and risk of birth defects in Southern California. Am J Epidemiol. 2002 Jan 1; 155(1):17-25. View in: PubMed

Urman R, Gauderman J, Fruin S, Lurmann F, Liu F, Hosseini R, Franklin M, Avol E, Penfold B, Gilliland F, Brunekreef B, McConnell R. Determinants of the Spatial Distributions of Elemental Carbon and Particulate Matter in Eight Southern Californian Communities. Atmos Environ (1994). 2014 Apr 1; 86:84-92. View in: PubMed

Kozawa KH, Winer AM, Fruin SA. Ultrafine particle size distributions near freeways: Effects of differing wind directions on exposure. Atmos Environ (1994). 2012 Dec; 63:250-260. View in: PubMed

Hu S, Fruin S, Kozawa K, Mara S, Paulson SE, Winer AM. A Wide Area of Air Pollutant Impact Downwind of a Freeway during Pre-Sunrise Hours. Atmos Environ (1994). 2009 May 1; 43(16):2541-2549. View in: PubMed

Fruin S, Urman R, Lurmann F, McConnell R, Gauderman J, Rappaport E, Franklin M, Gilliland FD, Shafer M, Gorski P, Avol E. Spatial Variation in Particulate Matter Components over a Large Urban Area. Atmos Environ (1994). 2014 Feb 1; 83:211-219. View in: PubMed

Hudda N, Eckel SP, Knibbs LD, Sioutas C, Delfino RJ, Fruin SA. Linking In-Vehicle Ultrafine Particle Exposures to On-Road Concentrations. Atmos Environ (1994). 2012 Nov 1; 59:578-586. View in: PubMed

Hu S, Paulson SE, Fruin S, Kozawa K, Mara S, Winer AM. Observation of Elevated Air Pollutant Concentrations in a Residential Neighborhood of Los Angeles California Using a Mobile Platform. Atmos Environ (1994). 2012 May 1; 51:311-319. View in: PubMed

Riley EA, Gould T, Hartin K, Fruin SA, Simpson CD, Yost MG, Larson T. Ultrafine particle size as a tracer for aircraft turbine emissions. Atmos Environ (1994). 2016 Aug; 139:20-29. View in: PubMed

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