Navigation Links
'Air laser' may sniff bombs, pollutants from a distance
Date:1/28/2011

lifying and organizing the light into a coherent laser beam aimed right back at the original laser.

Researchers plan to use a sensor to receive the returning beam and determine what contaminants it encountered on the way back.

"In general, when you want to determine if there are contaminants in the air you need to collect a sample of that air and test it," Miles said. "But with remote sensing you don't need to do that. If there's a bomb buried on the road ahead of you, you'd like to detect it by sampling the surrounding air, much like bomb-sniffing dogs can do, except from far away. That way you're out of the blast zone if it explodes. It's the same thing with hazardous gases you don't want to be there yourself. Greenhouse gases and pollutants are up in the atmosphere, so sampling is difficult."

The most commonly used remote laser-sensing method, LIDAR -- short for light detection and ranging -- measures the scattering of a beam of light as it reflects off a distant object and returns back to a sensor. It is commonly used for measuring the density of clouds and pollution in the air, but can't determine the actual identity of the particles or gases. Variants of this approach can identify contaminants, but are not sensitive enough to detect trace amounts and cannot determine the location of the gases with much accuracy.

The returning beam is thousands of times stronger in the method developed by the Princeton researchers, which should allow them to determine not just how many contaminants are in the air but also the identity and location of those contaminants.

The stronger signal should also allow for detection of much smaller concentrations of airborne contaminants, a particular concern when trying to detect trace amounts of explosive vapors. Any chemical explosive emits various gases depending on its ingredients, but for many explosives the amount of gas is miniscule.

While the researchers are developing the
'/>"/>

Contact: Steven Schultz
sschultz@princeton.edu
609-258-3617
Princeton University, Engineering School
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Sensitive laser instrument could aid search for life on Mars
2. ESA tests laser to measure atmospheric carbon dioxide
3. Princeton researchers discover new type of laser
4. Scientists use lasers to measure changes to tropical forests
5. Fattysaurus or thinnysaurus? How dinosaurs measure up with laser imaging
6. Researcher: Lasers used to detect melamine in baby formula
7. Using high-precision laser tweezers to juggle cells
8. Healing wounds with lasers, vehicles that drive themselves, other cutting-edge optics
9. Nonstick and laser-safe gold aids laser trapping of biomolecules
10. New Report Just Published: World Solid-State, Fiber, Gas and Dye Lasers Market Report
11. Laser processes promise better artificial joints, arterial stents
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
'Air laser' may sniff bombs, pollutants from a distance
(Date:7/25/2014)... first broad-scale estimate of air pollution removal by trees ... trees are saving more than 850 human lives a ... , While trees, pollution removal equated to an average ... impacts of that improvement are substantial. Researchers valued the ... nearly $7 billion every year in a study published ...
(Date:7/25/2014)... of people lived on the land now called California, ... the availability of plants they used for food, fuel, ... to maintain desired habitat and natural resources. , Frank ... Southwest Station, will lead a field trip ... Ecological Society of America,s 99th Annual Meeting, in Sacramento, ...
(Date:7/25/2014)... image from the Terra satellite show the different areas that ... Eastern Russia. The burn scars show up as reddish-brown ... have broken across the remote parts of Eastern Russia in ... the MODIS instrument, it is still possible to see ... image features noted below show the devastating number of fires ...
Breaking Biology News(10 mins):First national study finds trees saving lives, reducing respiratory problems 2Fire ecology manipulation by California native cultures 2Fire ecology manipulation by California native cultures 3
... highways or drive down any city street this ... manicured beds of flowers maintained by community volunteers ... gardens are taking root. Aside from the ... including landscaping and gardens, can help drivers reduce ...
... University doctoral student Jennifer Smith has shed new light on ... hunt for their food alone. In a paper ... a student in MSU,s Department of Zoology, shows that while ... cooperative societies, they also realize that venturing on their own ...
... 28, 2008The 2008 American Society for Microbiology (ASM) ... being presented to Stephen C. Edberg, Professor, Department ... School of Medicine, and Director, Clinical Microbiology Laboratory, ... this award recognizes a distinguished scientist for research ...
Cached Biology News:New roadside beautification concept studied 2Spotted hyenas can increase survival rates by hunting alone 2American Society for Microbiology honors Stephen C. Edberg 2
(Date:7/26/2014)... Albany, NY (PRWEB) July 26, 2014 ... 2020 provides key market data on the Canada ... in millions of US dollars, volume (in units) ... segments - High-End Endoscopy Visualization Systems, Mid-Range Endoscopy ... Browse Full Report at http://www.marketresearchreports.biz/analysis/213254 . , ...
(Date:7/25/2014)... "Ischemic Stroke and Cerebral Stroke Global ... the Ischemic Stroke and Cerebral Stroke clinical trial ... relating to the clinical trials on Ischemic Stroke ... Stroke Research Report 2014 at: http://www.marketresearchreports.biz/analysis/213207 ... numbers and their recruitment status as per the ...
(Date:7/25/2014)... , July 25, 2014 Amgen (NASDAQ: ... Directors today declared a $0.61 per share dividend for ... paid on Sept. 5, 2014, to all stockholders of ... 14, 2014.  About Amgen Amgen is ... suffering from serious illnesses by discovering, developing, manufacturing and ...
(Date:7/25/2014)... of bacteria live in each person,s digestive tract. Scientists ... and stave off harmful infections, but their role in ... shed light on the role of these bacteria, a ... Alm recently tracked fluctuations in the bacterial populations of ... described in the July 25 issue of the journal ...
Breaking Biology Technology:Canada Endoscopy Visualization Systems Market Outlook to 2020: MarketResearchReports.Biz 2Canada Endoscopy Visualization Systems Market Outlook to 2020: MarketResearchReports.Biz 3Canada Endoscopy Visualization Systems Market Outlook to 2020: MarketResearchReports.Biz 4Canada Endoscopy Visualization Systems Market Outlook to 2020: MarketResearchReports.Biz 5Ischemic Stroke and Cerebral Stroke Global Clinical Trials Review H2, 2014: MarketResearchReports.Biz 2Ischemic Stroke and Cerebral Stroke Global Clinical Trials Review H2, 2014: MarketResearchReports.Biz 3Amgen Announces 2014 Third Quarter Dividend 2Amgen Announces 2014 Third Quarter Dividend 3Monitoring the rise and fall of the microbiome 2Monitoring the rise and fall of the microbiome 3
... German . The heat which occurs in ... even a problem. On the contrary: It could be used ... more efficiently! These are two of the several potential applications ... (PTB). This so-called "thermoelectric voltage" may well be very interesting ...
... Spherix Incorporated (NASDAQ: SPEX ) ... diabetes, metabolic syndrome and atherosclerosis, and providers of ... biotechnology and pharmaceutical companies -- today announced that ... dyslipidemia in new studies of apolipoprotein E-deficient mice ...
... Oct. 24, 2011 Reaction Biology Corporation ("RBC"), ... services in epigenetics, today announced the rollout of ... research. RBC,s initial offerings will emphasize the histone ... has been no previous commercial source. ...
Cached Biology Technology:Magnetic nanoswitch for thermoelectric voltages 2Spherix Announces Results from New Preclinical Studies Showing SPX-106T Produces Significant Reductions in Cholesterol, Fat Deposition and Body Weight 2Spherix Announces Results from New Preclinical Studies Showing SPX-106T Produces Significant Reductions in Cholesterol, Fat Deposition and Body Weight 3Spherix Announces Results from New Preclinical Studies Showing SPX-106T Produces Significant Reductions in Cholesterol, Fat Deposition and Body Weight 4Reaction Biology Launches Recombinant Methyltransferase Line 2
... agarose suitable for a wide range of ... to Pulsed Field Gel Electrophoresis (PFGE). Due ... limits, Multi ABgarose can effectively separate large ... in turn means reduced band diffusion, a ...
Mouse monoclonal [1.F.1] to Yersinia pestis F1 antigen ( Abpromise for all tested applications). Antigen: Purified F1 antigen of Y. pestis vaccine strain EB....
Rabbit polyclonal to L Kynurenine ( Abpromise for all tested applications). Antigen: Synthetic peptide L Kynurenine conjugated to a protein carrier. Entrez Gene ID: 8942 Swiss Protein ID...
Rabbit polyclonal to P5 ( Abpromise for all tested applications). entrezGeneID: 10954 SwissProtID: Q14554...
Biology Products: