Navigation Links
Scientists utilise breath and sweat to detect trapped humans
Date:9/11/2011

Molecules in their breath, sweat and skin have been used to detect humans in a simulation of a collapsed building, raising the prospect of portable sensors for use in real-life situations, such as the devastating aftermath of the 9/11 attacks and more recent disasters in New Zealand and Japan.

Published today, Monday 12 September, in IOP Publishing's Journal of Breath Research, the study examined flumes of air to create a preliminary profile of molecules that could indicate human activity in a disaster zone, and it is notable for being the first of its kind to use human participants.

Over five days, in six-hour intervals, eight participants entered a simulator of a collapsed glass-clad reinforced-concrete building, which was designed, built and tested by the researchers from Loughborough University, National Technical University of Athens, University of Babe-Bolyai and University of Dortmund.

A variety of sensors, positioned throughout the simulator, rapidly detected carbon dioxide (CO2) and ammonia (NH3) with high-sensitivity in the plumes of air that travelled through the constructed rubble, highlighting their effectiveness as potential indicators.

In addition to these molecules, a large number of volatile organic compounds were detected; acetone and isoprene being the most prominent potential markers.

Interestingly, there was a marked decrease in NH3 levels when the participants were asleep; a finding the researchers could not explain and will investigate further, along with the build-up of acetone with increasing food withdrawal and the presence of detectable molecules in urine.

When trapped within a void of a collapsed building, casualties release volatile metabolites -- products of the body's natural breakdown mechanisms -- through their breath, skin and other bodily fluids, which can have complicated interactions with the building materials. Furthermore, these interactions change with conditions such as humidity, heat, and wind strength and direction, making the detection process much more difficult.

By creating a simulator that closely mimicked a real-life scenario, as well as using human participants, the researchers provided the most comprehensive insight into the processes that occur within disaster sites, raising the prospect of more accurate portable detection systems in the future.

The simulator itself was composed of three separate sections: the environmental section, which maintained the air flow, humidity and temperature; the void section, in which the participant was laid down; and the collapsed-building section, which was composed of densely packed building materials.

The researchers emphasised that the most important element of the study was the provision of safe and ethical experimental conditions for both the volunteers and research staff.

Co-author of the study, Professor Paul Thomas of Loughborough University, said, "This is the first scientific study on sensing systems that could detect trapped people. The development of a portable detection device based on metabolites of breath, sweat and skin could hold several advantages over current techniques.

"A device could be used in the field without laboratory support. It could monitor signs of life for prolonged periods and be deployed in large numbers, as opposed to a handful of dogs working, at risk to themselves and their handlers, for 20 minutes before needing extensive rest."

An Institute of Physics spokesperson said, "As the first study of its kind, this preliminary work can be built upon to help prepare for future disasters such as those tragedies we've seen recently in Japan and New Zealand."

"The trapped human experiment" was performed under the EC FP7 project "Second Generation Locator for Urban Search and Rescue" Operations.


'/>"/>

Contact: Michael Bishop
michael.bishop@iop.org
01-179-301-032
Institute of Physics
Source:Eurekalert

Related biology news :

1. USC scientists generate first detailed map of human neuroreceptor
2. USC scientists probe connection between sight and touch in the brain
3. Biomedical/health informatics scientists to present cutting-edge science, health IT
4. Scientists offer way to address age-old questions
5. USC scientists identify key protein linked to acute liver failure
6. Scientists make turfgrass safer for animals, deadly for insects
7. Scripps Research scientists pinpoint shape-shifting mechanism critical to protein signaling
8. New cellular surprise may help scientists better understand human mitochondrial diseases
9. Scripps Research scientists establish new class of anti-diabetic compound
10. Scripps Research scientists produce first stem cells from endangered species
11. Scientists announce human intestinal stem cell breakthrough for regenerative medicine
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/3/2016)... 2016 Das DOTM ... Nepal hat ein 44 Millionen ... Kennzeichen, einschließlich Personalisierung, Registrierung und IT-Infrastruktur, an ... und Implementierung von Identitätsmanagementlösungen. Zahlreiche renommierte internationale ... teilgenommen, aber Decatur wurde als konformste und ...
(Date:5/24/2016)... Calif. , May 24, 2016 Ampronix facilitates superior patient care by ... LMD3251MT  3D medical LCD display is the latest premium product recently added to the ... ... ... Sony 3d Imaging- LCD Medical Display- Ampronix News ...
(Date:5/3/2016)... , May 3, 2016  Neurotechnology, a ... the MegaMatcher Automated Biometric Identification System (ABIS) ... large-scale multi-biometric projects. MegaMatcher ABIS can process multiple ... using any combination of fingerprint, face or iris ... MegaMatcher SDK and MegaMatcher Accelerator , ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... 27, 2016  Global demand for enzymes is ... 2020 to $7.2 billion.  This market includes enzymes ... products, biofuel production, animal feed, and other markets) ... biocatalysts). Food and beverages will remain the largest ... consumption of products containing enzymes in developing regions.  ...
(Date:6/27/2016)...  Sequenom, Inc. (NASDAQ: SQNM ), a ... the development of innovative products and services, announced today ... States denied its petition to review decisions ... U.S. Patent No. 6,258,540 (",540 Patent") are not patent ... Supreme Court,s Mayo Collaborative Services v. Prometheus Laboratories decision.  ...
(Date:6/27/2016)... ... 27, 2016 , ... Parallel 6 , the leading software as a ... Reach Virtual Patient Encounter CONSULT module which enables both audio and video telemedicine ... team. , Using the CONSULT module, patients and physicians can schedule a face to ...
(Date:6/27/2016)... , ... June 27, 2016 , ... ... for Amgen, will join the faculty of the University of North Carolina ... professor of strategy and entrepreneurship at UNC Kenan-Flagler, with a focus on the ...
Breaking Biology Technology: