Navigation Links
Yale engineers track bacteria's kayak paddle-like motion for first time
Date:9/25/2009

New Haven, Conn.Yale engineers have for the first time observed and tracked E. coli bacteria moving in a liquid medium with a motion similar to that of a kayak paddle.

Their findings, which appear online September 29 in the journal Physical Review Letters, will help lead to a better understanding of how bacteria move from place to place and, potentially, how to keep them from spreading.

Scientists have long theorized that the cigar-shaped cell bodies of E. coli and other microorganisms would follow periodic orbits that resemble the motion of a kayak paddle as they drift downstream in a current. Until now, no one had managed to directly observe or track those movements.

Hur Koser, associate professor at Yale's School of Engineering & Applied Science, previously discovered that hydrodynamic interactions between the bacteria and the current align the bacteria in a way that allows them to swim upstream. "They find the most efficient route to migrate upstream, and we ultimately want to understand the mechanism that allows them to do that," Koser said.

In the new study, Koser, along with postdoctoral associate and lead author of the paper, Tolga Kaya, devised a method to see this motion in progress. They used advanced computer and imaging technology, along with sophisticated new algorithms, that allowed them to take millions of high-resolution images of tens of thousands of individual, non-flagellated E. coli drifting in a water and glycerin solution, which amplified the bacteria's paddle-like movements.

The team characterized the bacteria's motion as a function of both their length and distance from the surface. The team found that the longer and closer to the surface they were, the slower the E. coli "paddled."

It took the engineers months to perfect the intricate camera and computer system that allowed them to take 60 to 100 sequential images per second, then automatically and efficiently analyze the huge amount of resulting data.

E. coli and other bacteria can colonize wherever there is water and sufficient nutrients, including the human digestive tract. They encounter currents in many settings, from riverbeds to home plumbing to irrigation systems for large-scale agriculture.

"Understanding the physics of bacterial movement could potentially lead to breakthroughs in the prevention of bacterial migration and sickness," Koser said. "This might be possible through mechanical means that make it more difficult for bacteria to swim upstream and contaminate water supplies, without resorting to antibiotics or other chemicals."


'/>"/>

Contact: Suzanne Taylor Muzzin
suzanne.taylormuzzin@yale.edu
203-432-8555
Yale University
Source:Eurekalert  

Related biology news :

1. Environmentally green beer: Munich brewing engineers research energy savings
2. Boston University biomedical engineers teach bacteria to count
3. Civil engineers name NJITs John Schuring Educator of Year
4. Civil engineers name NJITs John Schuring Educator of Year Award
5. Vanderbilt engineers play key role in new DOE energy frontier research center
6. New method developed by UC San Diego bioengineers gives regenerative medicine a boost
7. Case Western Reserve University engineers hit pay dirt with clay mixture
8. Engineers develop method to disperse chemically modified graphene in organic solvents
9. LabRoots Launches Social Networking Site for Scientists & Engineers
10. Ben-Gurion University engineers develop technique to help combat nuclear proliferation
11. Iowa student engineers develop hand-held water sanitizer for a thirsty world
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Yale engineers track bacteria's kayak paddle-like motion for first time
(Date:4/13/2017)... According to a new market research report "Consumer IAM Market ... Authorization), Service, Authentication Type, Deployment Mode, Vertical, and Region - Global Forecast ... from USD 14.30 Billion in 2017 to USD 31.75 Billion by 2022, ... ... MarketsandMarkets Logo ...
(Date:4/11/2017)... 11, 2017 No two people are ... the New York University Tandon School of Engineering ... found that partial similarities between prints are common ... mobile phones and other electronic devices can be ... vulnerability lies in the fact that fingerprint-based authentication ...
(Date:4/5/2017)... 2017  The Allen Institute for Cell Science today ... one-of-a-kind portal and dynamic digital window into the human ... first application of deep learning to create predictive models ... and a growing suite of powerful tools. The Allen ... future publicly available resources created and shared by the ...
Breaking Biology News(10 mins):
(Date:5/26/2017)... ... May 25, 2017 , ... ... full process behind each occurrence. Live cell imaging using fluorescence microscopy is the ... use of automated fluorescence microscopy methods will be discussed, from small animal models ...
(Date:5/24/2017)... ... May 24, 2017 , ... Today, the South Davis ... Advanced Biological Nutrient Recovery (ABNRâ„¢) technology at its 4,000,000 gallon per day South ... to sustainably meet current and future nutrient discharge regulations. The ABNR platform, which ...
(Date:5/24/2017)... 2017 (PRWEB) , ... May 24, 2017 , ... ... Medical systems are increasingly being developed with Wi-Fi connectivity to reduce the amount ... from room to room. In addition, compact mobile devices including infusion pumps, heart ...
(Date:5/23/2017)... Westminster, Colorado (PRWEB) , ... May 23, 2017 , ... ... amaranth as the most troublesome and difficult to control weed in 12 categories of ... found. , Almost 200 weed scientists across the U.S. and Canada participated in the ...
Breaking Biology Technology: