Measurement of the “Effective” Surface Area of Ultrafine and Accumulation Mode PM (Pilot Project)EPA Grant Number: R827352C003
Subproject: this is subproject number 003 , established and managed by the Center Director under grant R827352
(EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).
Center: Southern California Particle Center and Supersite
Center Director: Froines, John R.
Title: Measurement of the “Effective” Surface Area of Ultrafine and Accumulation Mode PM (Pilot Project)
Investigators: Friedlander, Sheldon , Sioutas, Constantinos
Institution: University of California - Los Angeles , Michigan State University , University of California - Irvine , University of Southern California
Current Institution: University of California - Los Angeles , University of Southern California
EPA Project Officer: Chung, Serena
Project Period: June 1, 1999 through May 31, 2005 (Extended to May 31, 2006)
RFA: Airborne Particulate Matter (PM) Centers (1999) RFA Text | Recipients Lists
Research Category: Air Quality and Air Toxics , Particulate Matter , Air
The objective of this research project is to focus on the central hypothesis of the Southern California Particle Center and Supersite, which is that organic constituents associated with particulate matter (PM)—including quinones, other organic compounds (polycyclic aromatic hydrocarbons [PAHs], nitro-PAHs, and aldehydes/ketones), and metals—are capable of generating reactive oxygen species and acting as electrophilic agents. They have a central role in allergic airway disease such as asthma and cardiovascular effects through their ability to generate oxidative stress, inflammation, and immunomodulating effects in the lungs and airways.
This research project will systematically evaluate the effective density and surface area of ambient ultrafine PM. The methodology will allow for a direct comparison of "mobility" diameter—a function of particle surface area and shape—and "aerodynamic" diameter—a function of particle inertia only. The specific objectives of this research project are to: (1) study the variation in aerosol morphological properties around the Los Angeles Airshed, including surface area, fractal dimension, number of primary particles per aggregate, etc; (2) compare our results with measurements made with new aerosol instruments; and (3) compare size distributions measured with respect to aerodynamic and electrical mobility diameters using a novel method under development by our group.
Publications and Presentations:Publications have been submitted on this subproject: View all 1 publications for this subproject | View all 150 publications for this center
Journal Articles:Journal Articles have been submitted on this subproject: View all 1 journal articles for this subproject | View all 149 journal articles for this center
Supplemental Keywords:Particulate matter, quinones, PAHs, aldehydes, ketones, metals, allergic airway disease, human health risk, asthma, cardiovascular effects, oxidative stress, ultrafine particulate matter, aerosol morphological properties, atmospheric aerosol, environmental monitoring, Los Angeles, CA,, RFA, Health, Scientific Discipline, Air, HUMAN HEALTH, particulate matter, Environmental Chemistry, Air Pollutants, Risk Assessments, Biochemistry, Health Effects, Atmospheric Sciences, particulates, ambient aerosol, asthma, morphometric analyses, toxicology, quinones, human health effects, airway disease, allergic airway disease, ambient measurement methods, air pollution, PAH, particulate exposure, human exposure, toxicity, aerosol composition, breath samples, allergens, particle concentrator, airborne urban contaminants, human health risk, genetic susceptibility, aerosols, atmospheric chemistry, particle transport
Progress and Final Reports:
Main Center Abstract and Reports:R827352 Southern California Particle Center and Supersite
Subprojects under this Center: (EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).
R827352C001 The Chemical Toxicology of Particulate Matter
R827352C002 Pro-inflammatory and the Pro-oxidative Effects of Diesel Exhaust Particulate in Vivo and in Vitro
R827352C003 Measurement of the “Effective” Surface Area of Ultrafine and Accumulation Mode PM (Pilot Project)
R827352C004 Effect of Exposure to Freeways with Heavy Diesel Traffic and Gasoline Traffic on Asthma Mouse Model
R827352C005 Effects of Exposure to Fine and Ultrafine Concentrated Ambient Particles near a Heavily Trafficked Freeway in Geriatric Rats (Pilot Project)
R827352C006 Relationship Between Ultrafine Particle Size Distribution and Distance From Highways
R827352C007 Exposure to Vehicular Pollutants and Respiratory Health
R827352C008 Traffic Density and Human Reproductive Health
R827352C009 The Role of Quinones, Aldehydes, Polycyclic Aromatic Hydrocarbons, and other Atmospheric Transformation Products on Chronic Health Effects in Children
R827352C010 Novel Method for Measurement of Acrolein in Aerosols
R827352C011 Off-Line Sampling of Exhaled Nitric Oxide in Respiratory Health Surveys
R827352C012 Controlled Human Exposure Studies with Concentrated PM
R827352C013 Particle Size Distributions of Polycyclic Aromatic Hydrocarbons in the LAB
R827352C014 Physical and Chemical Characteristics of PM in the LAB (Source Receptor Study)
R827352C015 Exposure Assessment and Airshed Modeling Applications in Support of SCPC and CHS Projects
R827352C016 Particle Dosimetry
R827352C017 Conduct Research and Monitoring That Contributes to a Better Understanding of the Measurement, Sources, Size Distribution, Chemical Composition, Physical State, Spatial and Temporal Variability, and Health Effects of Suspended PM in the Los Angeles Basin (LAB)