Navigation Links
The bombardier beetle, power venom and spray technologies
Date:4/1/2008

The bombardier beetle is inspiring designers of engines, drug-delivery devices and fire extinguishers to improve spray technologies, writes Andy McIntosh, from Leeds University, and Novid Beheshti, of Swedish Biomimetics 3000 Ltd, in Aprils Physics World.

The bombardier beetle, found mainly in Africa and Asia, is remarkable in that it can fire a powerful jet of hot, toxic fluid to fight off predators such as birds and frogs. While the chemical reaction that makes the venom has been understood for some time, the actual power behind the venomous squirt, which can travel as far as 20cm, has been cause for speculation.

Quantities of hydroquinone and hydrogen peroxide gases build up in the beetles abdomen but, when necessary for defence, get mixed together in a connected combustion chamber to produce toxic benzoquinone. This hot fluid is then fired off at force in the face of enemy predators.

The key to the beetles powerful defensive trick is in its combustion chambers inlet (or entry) and exit valves. The inlet valve opens to receive the chemicals, which begin to boil as soon as they meet, and closes when a sufficient amount of gas has been received.

As the gases react together, they generate heat and increase the pressure in the closed chamber. When the pressure reaches a critical point, the end of the exit valve is forced open and the hot fluid is ejected as a powerful burst of toxic steam in a process known as "flash evaporation".

Once the gas is released, the exit valve closes, the inlet valve opens and the chamber fills again, preparing for the next venomous ejection.

The research team at the School of Process, Environmental and Materials Engineering at Leeds University has now managed to replicate how the bombardier beetle fires hot venom. In a series of experiments using just water (rather than venomous liquids), McIntosh and his team have been able to fire pulses of hot spray distances of up to 4 m and have been able to control the size of the droplets in the spray. The technique has now been licensed by Biomimetics 3000 Ltd for industrial applications.

This new technology is likely to be of interest to firms making drug-delivery systems as it could prove far more reliable than the mechanically-driven spring technology used in, for example, inhalers. It could also provide a much more energy-resourceful mechanism for fuel-injection in car engines and even lead to a new generation of fire extinguishers that can both produce either a fine mist or large droplets depending on what type of fire needs to be put out.

Also in this issue:

The search for astroengineers

Could looking for "Dyson spheres" - artificial shells harnessing light from distant stars - be a better way of looking for extraterrestrial life than trying to track down unusual radio and optical signals"

John Bardeen: an extraordinary physicist

A tribute to the only man to win two Nobel Prizes for Physics, who was born 100 years ago next month

Laser physicist looks to the Sun

An interview with Steven Chu, who is heading a new $500m Energy Biosciences Institute in California to find new alternative-energy sources


'/>"/>

Contact: Joe Winters
joseph.winters@iop.org
44-020-747-04815
Institute of Physics
Source:Eurekalert

Related biology news :

1. Continents loss to oceans boosts staying power
2. Wildcat Power Cord repairs cruciate ligament in dairy cows knee
3. Fujitsu Combines Capacity, Performance and Power Efficiency Into the Industrys First 320GB 7200 RPM 2.5" Sata Hard Disk Drive
4. The surprising power of the pill
5. Work with power grids leads to cell biology discovery
6. New twist on lifes power source
7. U of I researcher develops power-packed soy breakfast cereal
8. Genetic tags reveal secrets of memories staying power in mice
9. Powerful yet reliable proteomics techniques are the focus of a new methods book
10. Gene discovery made easier with powerful new networking technique
11. Department of Energy putting power in the hands of consumers through technology
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/20/2016)... , May 20, 2016  VoiceIt is ... partnership with VoicePass. By working together, ... experience.  Because VoiceIt and VoicePass take slightly different ... engines increases both security and usability. ... excitement about this new partnership. "This ...
(Date:5/12/2016)... 2016 WearablesResearch.com , a brand of ... results from the Q1 wave of its quarterly wearables ... consumers, receptivity to a program where they would receive ... insurance company. "We were surprised to see ... Michael LaColla , CEO of Troubadour Research, "primarily because ...
(Date:5/3/2016)...  Neurotechnology, a provider of high-precision biometric identification ... Identification System (ABIS) , a complete system for ... can process multiple complex biometric transactions with high ... face or iris biometrics. It leverages the core ... MegaMatcher Accelerator , which have been used in ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... , June 23, 2016  Blueprint Bio, a company ... to the medical community, has closed its Series A ... Nunez . "We have received a commitment ... capital we need to meet our current goals," stated ... us the runway to complete validation on the current ...
(Date:6/23/2016)... Francisco, CA (PRWEB) , ... June 23, 2016 ... ... (EDC) software, is exhibiting at the Pennsylvania Convention Center and will showcase its ... Annual conference. ClinCapture will also be presenting a scientific poster on Disrupting Clinical ...
(Date:6/23/2016)... , June 22, 2016  Amgen (NASDAQ: ... of the QB3@953 life sciences incubator to ... health. The shared laboratory space at QB3@953 was created ... a key obstacle for many early stage organizations - ... of the sponsorship, Amgen launched two "Amgen Golden Ticket" ...
(Date:6/22/2016)... 22, 2016 Research and Markets has announced ... report to their offering. ... from $29.3 billion in 2013. The market is expected to grow ... 2015 to 2020, increasing from $50.6 billion in 2015 to $96.6 ... during the forecast period (2015 to 2020) are discussed. As well, ...
Breaking Biology Technology: