Navigation Links
Atmospheric measuring device for understanding smog formation
Date:11/19/2007

UPTON, NY - Scientists at the U.S. Department of Energy's Brookhaven National Laboratory have developed a new tool for quantitatively measuring elusive atmospheric chemicals that play a key role in the formation of photochemical smog. Better measurements will improve scientists' understanding of the mechanisms of smog formation and their ability to select and predict the effectiveness of various mitigation strategies. The Brookhaven scientists have been issued a U.S. patent for their apparatus, which is available for licensing.

The device measures atmospheric hydroperoxyl radicals - short-lived, highly reactive intermediates involved in the formation of ozone, a component of photochemical smog - in the lowest layer of Earth's atmosphere. The levels of these radicals can indicate which of a variety of chemical pathways is predominant in converting basic starting ingredients - hydrocarbons, nitrogen oxides, and water vapor - into smog in the presence of sunlight.

"Understanding the relative importance of the various pathways can help you tailor your mitigation strategies," said Brookhaven atmospheric chemist Stephen Springston, one of the inventors. "For example, are you better off spending your money reducing hydrocarbon emissions or nitrogen oxide emissions?"

"Our measurements will help predict which strategy would be most successful for a particular set of atmospheric conditions - and make modifications to the strategy as those conditions change," said co-inventor Judy Lloyd of the State University of New York at Old Westbury, who holds a guest appointment at Brookhaven Lab.

Because hydroperoxyl radicals are so reactive, getting accurate measurements is not easy. "These chemicals are so fragile you cannot take a bottle home with you," Springston said. "You have to measure them where they form, in the atmosphere, before they react and disappear."

Various groups have developed detectors for hydroperoxyl radicals, but these have been cumbersome and costly. The new device is comparatively small, lightweight, and inexpensive, has low power requirements, and gives a sensitive, fast response. It works by detecting a "glowing" signal from a chemiluminescent compound - similar to the compound that makes fireflies glow - when it reacts with the hydroperoxyl radicals in atmospheric samples fed into the device during flight.

"The chemiluminescence produced in solution creates a strong and readily detectable signal without the need for complex amplification procedures," said Lloyd.

The device has been tested in a mountaintop setting, but has not yet been deployed on an aircraft for a sampling mission. It is designed to be flown on atmospheric sampling aircraft, such as the Department of Energy's Gulfstream 1, which has been used by Brookhaven and other national laboratory scientists for a variety of atmospheric studies.


'/>"/>

Contact: Karen McNulty Walsh
kmcnulty@bnl.gov
631-344-8350
DOE/Brookhaven National Laboratory
Source:Eurekalert

Related biology news :

1. Worldwide atmospheric measurements will determine the role of atmospheric fine particles
2. Device helps patients survive, regain function til transplant
3. Researchers developing device to predict proper light exposure for human health
4. IGERT fellows to design biodevices using flexible electronics
5. MIT aids creation of neural prosthetic devices
6. A study by the MUHC and McGill University opens a new door to understanding cancer
7. Understanding hypertension in African Americans proves elusive
8. Systems Biology poised to revolutionize the understanding of cell function and disease
9. Gregory Hannon wins 2007 Paul Marks Prize for contributions to understanding and treating cancer
10. Understanding, combating foodborne pathogens E. coli 0157 and salmonella
11. Researchers discover important tool in understanding differentiation in human embryonic stem cells
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/24/2017)... , March 24, 2017 The Controller General ... Controller Mr. Abdulla Algeen have received the prestigious international IAIR ... Continue Reading ... ... picture) and Deputy Controller Abdulla Algeen (small picture on the right) have ...
(Date:3/23/2017)... Research and Markets has announced the addition of the ... Forecast to 2025" report to their offering. ... The Global Vehicle Anti-Theft System ... over the next decade to reach approximately $14.21 billion by 2025. ... forecasts for all the given segments on global as well as ...
(Date:3/22/2017)... LIVERMORE, Calif. , March 21, 2017 ... recognition analytics company serving law enforcement agencies, announced today ... Sheridan as director of public safety business development. ... of diversified law enforcement experience, including a focus on ... Vigilant. In his most recent position, Mr. Sheridan served ...
Breaking Biology News(10 mins):
(Date:5/22/2017)... ... , ... Stratevi, a boutique firm that partners with healthcare companies to creatively ... office in downtown Boston at 745 Atlantic Ave. , “We are seeing that ... on the value they provide, not just to patients, but also payers. Having a ...
(Date:5/21/2017)... ... May 20, 2017 , ... ... avoid the lengthy trial and error process by finding the right antidepressant faster. ... also strengthen the doctor-patient relationship through a personalized approach to treatment. ...
(Date:5/18/2017)... ... 18, 2017 , ... Lajollacooks4u has added another option for ... team-building package designed for groups of 10-30 people. Guests can choose their ... such as Blackened Shrimp with Edamame Salad, Pizza Rolls with Pepperoni and Mushrooms ...
(Date:5/18/2017)... ... May 17, 2017 , ... Cognition Corporation ( ... just released version 9.0 of the Cognition Cockpit platform. , “Our whole team ... David Cronin, CEO of Cognition. “We’re thrilled to finally be able to release ...
Breaking Biology Technology: