HOME >> MEDICINE >> NEWS
Nerve Agent Sensor A Million Times More Sensitive

An extremely sensitive and selective sensor that can detect minute traces of the chemical nerve agents sarin and soman has been successfully tested by researchers at Johns Hopkins University. Sarin was the agent used in the infamous 1995 terrorist attack on a Tokyo subway. Both compounds are reputed chemical weapons in the arsenals of some countries.

The sensor is described in the January 15 print edition of the peer reviewed journal Analytical Chemistry, published by the American Chemical Society, the world's largest scientific society. The web edition of the article was published Dec. 10.

The sensor, which combines molecular imprinting with optical luminescence, is able to detect sarin and soman in water at levels as low as 600 parts per quadrillion. "It's a million times more sensitive than other reported solution sensitivities," says George Murray, Ph.D., a senior research chemist with Johns Hopkins' Advanced Physics Laboratory in Laurel, Md. "Just a thousand molecules probably is all it would take for us to detect it," he claims. "That's smaller than a gnat in a bathtub of water."

Molecular imprinting is analogous to making a plaster impression of the particular molecule you want to find, says Murray. "The cast is made of a stiff plastic so that when the molecule is removed, the shape of the molecule in the cast is preserved." Because the structure of each molecule is unique, the probe only recognizes the specific molecule for which you are probing.

The actual probe developed by Murray and his colleagues for detecting nerve agents in water is a tapered optical fiber, which is treated with europium, a metallic element used in the manufacturer of television screens. The fiber is hooked to a spectrometer and a light source. Light is directed to the end of the fiber in the solution being examined and the light that returns from the tip is analyzed by the spectrometer.

Work
'"/>

Contact: Charmayne Marsh
y_marsh@acs.org
202-872-4445
American Chemical Society
29-Dec-1998


Page: 1 2

Related medicine news :

1. Nerve damage from alcoholism reversed after liver transplantation
2. Nerve navigation findings prompt new direction for spinal cord research
3. Vagus Nerve Stimulation Therapy (TM) more effective in epilepsy patients when used earlier
4. Nerve Cells Live Long And Talkative Lives In Sculpted Colonies On Silicon Chips
5. Cut Nerve Fibers Are Repaired In An Animal Model of Spinal Cord Injury; May Help Repair Nerve Damage In Humans
6. Percutaneous Electrical Nerve Stimulation May Offer Dramatic Short-Term Relief For Chronic Back Pain
7. Hunter College Biologist Marie Filbin Identifies Mechanism That Blocks All Inhibitors Of Nerve Regeneration; Breakthrough Reported In Neuron Magazine
8. Electrical Nerve Stimulation May Help Reduce Chronic Pain In Cancer Patients, Say UT Southwestern Researchers
9. Study Shows Potential For Quelling AIDS Nerve Pain
10. Advances in Skeletal Anabolic Agents for the Treatment of Osteoporosis: A scientific meeting
11. Joint meeting on Agent Orange set for March 3-6 in Hanoi

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:10/8/2019)... Calif. (PRWEB) , ... October 08, 2019 , ... ... stores - Kroger, Ralphs, QFC and Fred Meyer, King Sooper, Fry’s, Roundy’s, Smiths ... Whole30 approved, dairy-free, grain-free & gluten-free. , “Ingredient purity and fresh taste ...
(Date:10/8/2019)... ... October 08, 2019 , ... SoCal Adolescent Wellness announces the opening ... the expansion of our services to better serve the families in Orange County," said ... year to see the extraordinary impact this pre-intervention program has on the lives of ...
(Date:10/8/2019)... ... October 08, 2019 , ... Dr. Amir HagShenas of Silicon Valley Smile Solutions ... relief from this common and treatable condition. Dr. HagShenas’ goal is to treat ... with uncomfortable symptoms, including tender and bleeding gums, and to prevent gum disease from ...
(Date:10/8/2019)... Hartford, CT (PRWEB) , ... October 08, 2019 ... ... at JawFixers in West Hartford, CT, help patients with missing teeth restore their ... year, this team of oral surgeons relies on advanced i-CAT® 3D Cone Beam ...
(Date:10/8/2019)... ... October 08, 2019 , ... ... innovator, Dr. Jerry Henderson as Chief Medical Officer. Dr. Henderson will be responsible ... , Dr. Henderson previously served as Chair of both the Informatics Governance ...
Breaking Medicine News(10 mins):
(Date:10/10/2019)... ... 10, 2019 , ... Global Composer & Activist Nenad Bach ... Tennis Championships, October 11th – 13th,  , The debilitating effects of Parkinson’s disease left ... to find a way to combat the disease. A friend invited him to ...
(Date:10/10/2019)... ... 2019 , ... Smile Brands Inc. together with its affiliate A+ Dental Care ... a new A+ location in Natomas. , A+ Dental Care (“A+”) is a rapidly ... 14 general dentists and three specialists work together as a team to provide comprehensive, ...
(Date:10/9/2019)... ... October 09, 2019 , ... The 11th annual ... Yoga Science and AMI Meditation for the relief and prevention of physician burnout. ... October 22-26, 2019 at the Cranwell Resort and Spa in Lenox, Massachusetts, is ...
Breaking Medicine Technology:
Cached News: