Navigation Links
Where there's wildfire smoke, there's toxicity

The health threat to city dwellers posed by Southern California wildfires like those of November 2008 may have been underestimated by officials.

Detailed particulate analysis of the smoke produced by previous California wild fires indicates that the composition posed more serious potential threats to health than is generally realized, according to a new paper analyzing particulate matter (PM) from wildfires in Southern California.

The paper, entitled "Physicochemical and Toxicological Profile of Particulate Matter (PM) in Los Angeles during the October 2007 Southern California Wildfires," will appear in Environmental Science and Technology. It confirms earlier studies by air polllution specialist Constantinos Sioutas of the USC Viterbi School of Engineering, who is also co-director of the Southern California Particle Center.

For the study Sioutas and colleagues from USC, the University of Wisconsin-Madison and RIVM (the National Institute of Health and the Environment of the Netherlands) analyzed the particular matter gathered during the fall 2007 blazes.

"Fire emissions produce a significantly larger aerosol in size than typically seen in urban environments during periods affected by traffic sources, which emit mostly ultrafine particles," Sioutas said.

"Staying indoors may not provide protection from smoke particles in the absence of air conditioning or the ability to recirculate filtered indoor air. This is because the fire particles can penetrate indoor structures more readily than particles from vehicular emissions."

According to Sioutas, the fires produce a dangerous mix. "The chemical composition of particles during the fire episodes is different than that during 'normal' days impacted by traffic sources.

"Tracers of biomass burning (e.g. potassium and levoglucosan) were elevated by two-fold during the fire periodm" he said. "Water-soluble organic carbon (WSOC) was also higher during the fire event. This makes these particles from wood smoke more bioavailable, thus more readily absorbable by our system than particulate matter from traffic sources."

The ability of the particulates to penetrate structures, even if windows are closed, and their potential ability to be absorbed by human tissues are a matter of concern. "More aggressive measures to avoid smoke seem to deserve study, including distribution of masks and evacuation to air conditioned environments, and closure of non-smoke secured schools," said Sioutas, who holds the school's Fred Champion Professorship of Civil and Environmental Engineering.


Contact: Eric Mankin
University of Southern California

Related biology news :

1. Survey highlights support for nanotech in health fields but disapproval elsewhere
2. Where optics meets medicine
3. A new journal where molecular biology meets clinical research
4. Where is your soil water? Crop yield has the answer
5. Not just for the monkeys: New publication shows evolution is everywhere
6. New study predicts where corals can thrive
7. How and where fat is stored predicts disease risk better than weight
8. Where college students live can impact their weight, eating and exercise habits
9. MRSA in hospital intensive care -- whats growing where?
10. Where will we find the next generation of engineers?
11. Where and why humans made skates out of animal bones
Post Your Comments:
Related Image:
Where there's wildfire smoke, there's toxicity
(Date:11/11/2015)... , Nov. 11, 2015   MedNet Solutions , ... spectrum of clinical research, is pleased to announce that it ... Clinical Trials (PCT) event, to be held November 17-19 ... able to view live demonstrations of iMedNet ... learn how iMedNet has been able to deliver ...
(Date:11/4/2015)... ALBANY, New York , November 4, 2015 /PRNewswire/ ... According to a new market report published by Transparency ... Size, Share, Growth, Trends and Forecast 2015 - 2022", ... value of US$ 30.3 bn by 2022. The market ... during the forecast period from 2015 to 2022. Rising ...
(Date:10/29/2015)... , Oct. 29, 2015  Rubicon Genomics, Inc., ... U.S. distribution of its DNA library preparation products, ... Rubicon,s new ThruPLEX Plasma-seq kit. ThruPLEX Plasma-seq has ... preparation of NGS libraries for liquid biopsies--the analysis ... and prognostic applications in cancer and other conditions. ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... 2015  Clintrax Global, Inc., a worldwide provider of clinical research ... announced that the company has set a new quarterly earnings record ... quarter growth posted for Q3 of 2014 to Q3 of 2015. ... Mexico , with the establishment of an Asia-Pacific ... United Kingdom and Mexico ...
(Date:11/24/2015)... , November 24, 2015 ... market research report released by Transparency Market Research, the ... at a CAGR of 17.5% during the period between ... Market - Global Industry Analysis, Size, Volume, Share, Growth, ... non-invasive prenatal testing market to reach a valuation of ...
(Date:11/24/2015)... ... 2015 , ... InSphero AG, the leading supplier of easy-to-use solutions for production, ... to serve as Chief Operating Officer. , Having joined InSphero in November ... and was promoted to Head of InSphero Diagnostics in 2014. There she has ...
(Date:11/24/2015)... 24, 2015  PDL BioPharma, Inc. (PDL) (NASDAQ: PDLI ... company,s president and chief executive officer, will present at the ... in New York City . The presentation ... 1, 2015 at 9:30 a.m. EST. ... website at least 15 minutes prior to the presentation to ...
Breaking Biology Technology: