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Glowing bacteria detect buried landmines

Researchers remotely detect buried landmines, using fluorescent bacteria encased in polymeric beads, illuminated by a laser-based scanning system

Date:
April 11, 2017
Source:
The Hebrew University of Jerusalem
Summary:
Clearing landmines is dangerous work, posing risk of injury or death to personnel trying to find them. Responding to this need, researchers report a novel system combining lasers and fluorescent bacteria to remotely map the location of buried landmines and unexploded ordnance.
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Remote detection of buried landmines is a possible application of system to remotely detect buried landmines using a bacterial sensor and a laser-based scanning system.
Credit: Hebrew University

The need for safe and efficient technologies for detecting buried landmines and unexploded ordnance is a humanitarian issue of immense global proportions. About half a million people around the world are suffering from mine-inflicted injuries, and each year an additional 15 to 20 thousand more people are injured or killed by these devices. More than 100 million such devices are still buried in over 70 countries.

The major technical challenge in clearing minefields is detecting the mines. The technologies used today are not much different from those used in World War II, requiring detection teams to risk life and limb by physically entering the minefields. Clearly, there is a critical need for an efficient solution for the remote detection of buried landmines and unexploded ordnance.

Researchers from the Hebrew University of Jerusalem now report a potential answer to this need. Writing in the journal Nature Biotechnology, they present a novel, functional system combining lasers and bacteria to remotely map the location of buried landmines and unexploded ordnance.

The system is based on the observation that all landmines leak minute quantities of explosive vapors, which accumulate in the soil above them and serve as markers for their presence. The researchers molecularly engineered live bacteria that emit a fluorescent signal when they come into contact with these vapors. This signal can be recorded and quantified from a remote location.

The bacteria were encapsulated in small polymeric beads, which were scattered across the surface of a test field in which real antipersonnel landmines were buried. Using a laser-based scanning system, the test field was remotely scanned and the location of the buried landmines was determined. This appear to be the first demonstration of a functional standoff landmine detection system.

"Our field data show that engineered biosensors may be useful in a landmine detection system. For this to be possible, several challenges need to be overcome, such as enhancing the sensitivity and stability of the sensor bacteria, improving scanning speeds to cover large areas, and making the scanning apparatus more compact so it can be used on board a light unmanned aircraft or drone," said Prof. Shimshon Belkin, from the Hebrew University's Alexander Silberman Institute of Life Sciences, who was responsible for genetically engineering the bacterial sensors.


Story Source:

Materials provided by The Hebrew University of Jerusalem. Note: Content may be edited for style and length.


Journal Reference:

  1. Shimshon Belkin, Sharon Yagur-Kroll, Yossef Kabessa, Victor Korouma, Tali Septon, Yonatan Anati, Cheinat Zohar-Perez, Zahi Rabinovitz, Amos Nussinovitch, Aharon J Agranat. Remote detection of buried landmines using a bacterial sensor. Nature Biotechnology, 2017; 35 (4): 308 DOI: 10.1038/nbt.3791

Cite This Page:

The Hebrew University of Jerusalem. "Glowing bacteria detect buried landmines: Researchers remotely detect buried landmines, using fluorescent bacteria encased in polymeric beads, illuminated by a laser-based scanning system." ScienceDaily. ScienceDaily, 11 April 2017. <www.sciencedaily.com/releases/2017/04/170411104500.htm>.
The Hebrew University of Jerusalem. (2017, April 11). Glowing bacteria detect buried landmines: Researchers remotely detect buried landmines, using fluorescent bacteria encased in polymeric beads, illuminated by a laser-based scanning system. ScienceDaily. Retrieved May 25, 2017 from www.sciencedaily.com/releases/2017/04/170411104500.htm
The Hebrew University of Jerusalem. "Glowing bacteria detect buried landmines: Researchers remotely detect buried landmines, using fluorescent bacteria encased in polymeric beads, illuminated by a laser-based scanning system." ScienceDaily. www.sciencedaily.com/releases/2017/04/170411104500.htm (accessed May 25, 2017).

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