Research Topics
| Timothy LarsonSummaryAffiliation: University of Washington Country: USA Publications
| Collaborators
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Detail Information
Publications
Changes in lung function and airway inflammation among asthmatic children residing in a woodsmoke-impacted urban areaRyan W Allen
Faculty of Health Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
Inhal Toxicol 20:423-33. 2008..5), whereas airway inflammation may be more closely related to some other constituent of the ambient PM(2.5) mixture...- A spatial model of urban winter woodsmoke concentrationsTimothy Larson
Department of Civil and Environmental Engineering, University of Washington, Seattle, Washington, USA
Environ Sci Technol 41:2429-36. 2007..66). This model, the first application of land use regression for woodsmoke, enabled the identification and prediction of previously unrecognized high woodsmoke regions within an urban airshed... - Source apportionment of indoor, outdoor, and personal PM2.5 in Seattle, Washington, using positive matrix factorizationTimothy Larson
Department of Civil and Environmental Engineering, University of Washington, Seattle, Washington 98195, USA
J Air Waste Manag Assoc 54:1175-87. 2004..Personal exposures to crustal sources were strongly associated with personal activities, especially time spent at school among the child subjects... - Effects of subchronic and chronic exposure to ambient air pollutants on infant bronchiolitisCatherine Karr
Department of Pediatrics, School of Medicine, University of Washington, Seattle 98104, WA, USA
Am J Epidemiol 165:553-60. 2007..5. These unique US data suggest that infant bronchiolitis may be added to the list of adverse effects of PM2.5 exposure... - Mobile monitoring of particle light absorption coefficient in an urban area as a basis for land use regressionTimothy Larson
Department of Civil and Environmental Engineering, University of Washington, Seattle, WA, USA
Environ Sci Technol 43:4672-8. 2009..Models of the mean, 75th, and 90th percentiles favored predictors describing truck, rather than total, traffic. This approach is applicable to other urban areas to facilitate the development of LUR models for particulate matter... - Fine particulate matter (PM?.?) air pollution and immune status among women in the Seattle areaLori Williams
Department of Epidemiology, School of Public Health, University of Washington, Seattle, Washington, USA
Arch Environ Occup Health 66:155-65. 2011..If additional studies confirm our findings, then future health effect assessments for PM?.? should consider changes in cellular immunity as an endpoint that may lead to overt clinical disease... - Estimated hourly personal exposures to ambient and nonambient particulate matter among sensitive populations in Seattle, WashingtonRyan Allen
Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, Washington 98195, USA
J Air Waste Manag Assoc 54:1197-211. 2004.... - Infant exposure to fine particulate matter and traffic and risk of hospitalization for RSV bronchiolitis in a region with lower ambient air pollutionCatherine J Karr
Department of Pediatrics, University of Washington, Seattle, WA 98104, USA
Environ Res 109:321-7. 2009..Future studies are needed that can investigate threshold effects and capture larger variability in spatial contrasts among populations of infants... - Use of real-time light scattering data to estimate the contribution of infiltrated and indoor-generated particles to indoor airRyan Allen
Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, Washington 98195, USA
Environ Sci Technol 37:3484-92. 2003.... - Improving spatial concentration estimates for nitrogen oxides using a hybrid meteorological dispersion/land use regression model in Los Angeles, CA and Seattle, WADarren Wilton
Department of Civil and Environmental Engineering, University of Washington, 201 More Hall, Box 352700, Seattle, WA 98195 2700, United States
Sci Total Environ 408:1120-30. 2010..9 (SE=0.7) and 0.16 (SE=0.12) grams NO(X)/vehicle mile for heavy-duty and lighter-duty vehicles, respectively. These values are consistent with fleet average emission factors computed for LA with EMFAC 2007... - Development and evaluation of a personal particulate organic and mass samplerYanbo Pang
Department of Civil and Environmental Engineering, Washington State University, Pullman, Washington 99164-2910, USA
Environ Sci Technol 36:5205-10. 2002..The PPOMS design can also simplify accurate ambient sampling for PM2.5... - Pulmonary effects of indoor- and outdoor-generated particles in children with asthmaJane Q Koenig
Department of Environmental Health and Occupational Sciences, University of Washington, Seattle, Washington 98195, USA
Environ Health Perspect 113:499-503. 2005..We conclude that the ambient-generated component of PM2.5 exposure is consistently associated with increases in eNO and the indoor-generated component is less strongly associated with eNO... - A case-crossover study of wintertime ambient air pollution and infant bronchiolitisCatherine Karr
Department of Pediatrics, University of Washington, Seattle, Washington 98104, USA
Environ Health Perspect 114:277-81. 2006..We examined the association of infant bronchiolitis with acute exposure to ambient air pollutants... - Testing the metals hypothesis in Spokane, WashingtonCandis S Claiborn
Laboratory for Atmospheric Research and Department of Civil and Environmental Engineering, Washington State University, Pullman 99164 2910, Washington, USA
Environ Health Perspect 110:547-52. 2002..Further research will clarify whether there is an association between specific health outcomes and either coarse or fine particulate metal species... - Proximity to traffic, inflammation, and immune function among women in the Seattle, Washington, areaLori A Williams
Department of Epidemiology, School of Public Health and Community Medicine, University of Washington, Seattle, Washington 98109 1024, USA
Environ Health Perspect 117:373-8. 2009..Traffic-related air pollution has been associated with adverse health outcomes, and the immune system may be a biologic mediator of health effects... - A controlled inhalation diesel exhaust exposure facility with dynamic feedback control of PM concentrationTimothy Gould
Department of Civil and Environmental Engineering, University of Washington, Seattle, Washington 98195 2700, USA
Inhal Toxicol 20:49-52. 2008..The facility enables study of the relationship between diesel exhaust and cardiovascular and respiratory health effects in human and animal models... - Infiltration of forest fire and residential wood smoke: an evaluation of air cleaner effectivenessPrabjit Barn
School of Environmental Health, The University of British Columbia, Vancouver, British Columbia, Canada
J Expo Sci Environ Epidemiol 18:503-11. 2008..001). No significant predictors of ACE were identified. Our findings show that remaining indoors combined with use of air cleaner can effectively reduce PM(2.5) exposure during forest fires and residential wood burning... - An innovative land use regression model incorporating meteorology for exposure analysisJason G Su
Department of Geography, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z2
Sci Total Environ 390:520-9. 2008..The results show that, when variability in seasonal concentration measurements is present, the source area LUR or SA-LUR model is a better option for concentration estimation... - Spatial modeling for air pollution monitoring network design: example of residential woodsmokeJason G Su
Department of Geography, University of British Columbia, Vancouver, British Columbia, Canada
J Air Waste Manag Assoc 57:893-900. 2007..Overall the results show that relatively simple data inputs and spatial analysis can be effective in capturing the spatial variability of ambient air pollution emissions and concentrations... - Loading effect correction for real-time aethalometer measurements of fresh diesel sootJorge Jimenez
EULA Chile, Environmental Sciences Center, University of Concepcion, Concepcion, Chile
J Air Waste Manag Assoc 57:868-73. 2007.... - Spatial characteristics of fine particulate matter: identifying representative monitoring locations in Seattle, WashingtonEmily Goswami
ENTRIX Inc, Walnut Creek, California, USA
J Air Waste Manag Assoc 52:324-33. 2002..These representative spatial characteristics were used as multiple, overlapping criteria in a Geographic Information System (GIS) analysis to determine where the most representative sites are located... - Two-photon luminescence imaging of cancer cells using molecularly targeted gold nanorodsNicholas J Durr
Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
Nano Lett 7:941-5. 2007.... - Evaluation of the recursive model approach for estimating particulate matter infiltration efficiencies using continuous light scattering dataRyan Allen
Faculty of Health Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
J Expo Sci Environ Epidemiol 17:468-77. 2007..This variation across homes indicates the need for home-specific estimation methods, such as the RM or sulfur tracer, instead of techniques that give average estimates of infiltration across homes... - Effects of select PM-associated metals on alveolar macrophage phosphorylated ERK1 and -2 and iNOS expression during ongoing alteration in iron homeostasisColette Prophete
NYU-EPA Particulate Matter Health Research Center, Nelson Institute of Environmental Medicine, New York University School of Medicine, Tuxedo, New York 10987, USA
J Toxicol Environ Health A 69:935-51. 2006..These results confirmed our hypothesis that certain metals associated with PM(2.5) might alter the pulmonary immunocompetence of exposed hosts by affecting the Fe status of AM, a major class of deep lung defense cells...