Navigation Links
Life in a bubble
Date:7/30/2008

CAMBRIDGE, Mass. -- Hundreds of insect species spend much of their time underwater, where food may be more plentiful. MIT mathematicians have now figured out exactly how those insects breathe underwater.

By virtue of their rough, water-repellent coat, when submerged these insects trap a thin layer of air on their bodies. These bubbles not only serve as a finite oxygen store, but also allow the insects to absorb oxygen from the surrounding water.

"Some insects have adapted to life underwater by using this bubble as an external lung," said John Bush, associate professor of applied mathematics, a co-author of the recent study.

Thanks to those air bubbles, insects can stay below the surface indefinitely and dive as deep as about 30 meters, according to the study co-authored by Bush and Morris Flynn, former applied mathematics instructor. Some species, such as Neoplea striola, which are native to New England, hibernate underwater all winter long.

This phenomenon was first observed many years ago, but the MIT researchers are the first to calculate the maximum dive depths and describe how the bubbles stay intact as insects dive deeper underwater, where pressure threatens to burst them.

The new study, which appears in the Aug. 10 issue of the Journal of Fluid Mechanics, shows that there is a delicate balance between the stability of the bubble and the respiratory needs of the insect.

The air bubble's stability is maintained by hairs on the insects' abdomen, which help repel water from the surface. The hairs, along with a waxy surface coating, prevent water from flooding the spiraclestiny breathing holes on the abdomen.

The spacing of these hairs is critically important: The closer together the hairs, the greater the mechanical stability and the more pressure the bubble can withstand before collapsing.

However, mechanical stability comes at a cost. If the hairs are too close together, there
'/>"/>

Contact: Teresa Herbert
therbert@mit.edu
617-258-5403
Massachusetts Institute of Technology
Source:Eurekalert

Page: 1 2

Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/28/2014)... 2014  Privacy Advocate and Senior Staff Attorney at ... joins the lineup of biometric and mobile commerce experts ... Executive Summit in Tampa, Florida ... speakers include Steven Rahman, Director, Technology and Strategy at Samsung, ... The theme of this year,s event is Mobility at ...
(Date:8/28/2014)... for measuring and imaging how quickly blood flows in ... how drug abuse affects the brain, which may aid ... to better treatment options for recovering drug addicts. The ... Stony Brook University in New York, USA and the ... The Optical Society,s (OSA) open-access journal Biomedical ...
(Date:8/28/2014)... mould in homes could pose a significant health risk to ... the Journal of Allergy and Clinical Immunology . , ... different countries, the research has found that the presence of ... asthma sufferers, as well as increasing the likelihood of developing ... team at the University of Exeter Medical School and is ...
Breaking Biology News(10 mins):Biometrics UnPlugged Welcomes the Electronic Frontier Foundation's Jennifer Lynch to the Mobility at the Crossroads of Commerce and Privacy Summit 2This is your brain's blood vessels on drugs 2This is your brain's blood vessels on drugs 3Indoor mold poses health risk to asthma sufferers 2
... Nanotechnology holds great promise for the future of ... the safety of nanoproducts may limit these important ... to the U.S. House Committee on Science and ... for Biological and Environmental Nanotechnology (CBEN) and executive ...
... infections, may be a strong weapon in the ... to an article in the November issue of ... seen as exotic diseases, but this is changing ... infections are a major problem for the immunocompromised, ...
... MEAS ), a designer and manufacturer of sensors ... German,Business Tax Reform 2008 on current year financial statements. ... effective on August,17, 2007, reduces the corporate income tax ... German tax rate from approximately 39% to 31%.,Although this ...
Cached Biology News:Rice University expert calls for coordination in nanotechnology research 2Gamma interferon could aid fight against fungal infections 2Measurement Specialties, Inc. Announces Impact of 'German Business Tax Reform 2008' Resulting in Lower Combined German Tax Rate - Impacts 2Q08 Reported Financial Results 2Measurement Specialties, Inc. Announces Impact of 'German Business Tax Reform 2008' Resulting in Lower Combined German Tax Rate - Impacts 2Q08 Reported Financial Results 3
(Date:8/28/2014)... CA (PRWEB) August 28, 2014 ... is offering a promotion for Eppendorf Safe ... customers to purchase the highest quality tubes at ... are ideal for customers doing chemical, medical, pharmaceutical, ... technicians who are not regularly able to afford ...
(Date:8/27/2014)... Varian Medical Systems today broke ground ... Lake City manufacturing facility and allow for the consolidation ... create 1,000 new full time jobs in the state ... home to hardworking people with immense engineering and technical ... success in the manufacturing of our state-of-the-art X-ray technology,” ...
(Date:8/27/2014)... BOSTON , Aug. 27, 2014 Rhythm, ... diseases and genetic deficiencies that result in metabolic disorders, ... on Form S-1 with the U.S. Securities and Exchange ... of shares of its common stock. The number of ... the offering have not yet been determined. ...
(Date:8/27/2014)... NEW YORK , Aug. 27, 2014 ... market research report is available in its ... Market 2014-2018 http://www.reportlinker.com/p02316661/Global-Biodegradable-Packaging-Materials-Market-2014-2018.html ... Biodegradable materials are materials that are readily ... packaging differs from conventional non-degradable packaging in ...
Breaking Biology Technology:Eppendorf Safe Lock Centrifuge Tube Promotion Now Available at Major Pipette Distributor Pipette.com 2Eppendorf Safe Lock Centrifuge Tube Promotion Now Available at Major Pipette Distributor Pipette.com 3Varian Medical Systems Groundbreaking on Facility Expansion Triggers Influx of New Jobs to Salt Lake 2Varian Medical Systems Groundbreaking on Facility Expansion Triggers Influx of New Jobs to Salt Lake 3Rhythm Files Registration Statement for Proposed Initial Public Offering 2Global Biodegradable Packaging Materials Market 2014-2018 2Global Biodegradable Packaging Materials Market 2014-2018 3Global Biodegradable Packaging Materials Market 2014-2018 4Global Biodegradable Packaging Materials Market 2014-2018 5Global Biodegradable Packaging Materials Market 2014-2018 6Global Biodegradable Packaging Materials Market 2014-2018 7
... compounds to reduce inflammation and strengthen host defences could be ... could be the most successful treatment for IBD to date, ... of the Journal of Medical Microbiology . IBD ... and bloody diarrhoea and abdominal pain. It is an emerging ...
... This release is available in German . ... research facility CNRS, south of Paris, are using electric fields ... store data permanently. This principle could not only improve random ... generation of electronic devices. This new kind of memory ...
... ... on Patent Quality, Not Quantity , ... Chicago, IL (PRWeb) January 19, 2010-- Ocean Tomo, LLC, the Chicago-based ... Bloomberg BusinessWeek. , , , , ,The study, which ranks the 25 companies with ...
Cached Biology Technology:Promising probiotic treatment for inflammatory bowel disease 2Data at the end of the tunnel 2Ocean Tomo Study Ranks Top 25 Most Inventive Companies for Bloomberg BusinessWeek, 2Ocean Tomo Study Ranks Top 25 Most Inventive Companies for Bloomberg BusinessWeek, 3Ocean Tomo Study Ranks Top 25 Most Inventive Companies for Bloomberg BusinessWeek, 4
Rat Normal Multiple Tissue Array 1 slide...
... LiCl precipitation offers major advantages over other ... precipitate DNA, protein or carbohydrates. It is the ... or cDNA synthesis from RNA preparations. Note, LiCl ... total RNA isolations. If the RNA is to ...
...
...
Biology Products: