Navigation Links
Swimming microorganisms stir things up, and the LHC takes over
Date:10/11/2010

Two separate research groups are reporting groundbreaking measurements of the fluid flow that surrounds freely swimming microorganisms. Experiments involving two common types of microbes reveal the ways that one creature's motion can affect its neighbors, which in turn can lead to collective motions of microorganism swarms. In addition, the research is helping to clarify how the motions of microscopic swimmers produces large scale stirring that distributes nutrients, oxygen and chemicals in lakes and oceans. A pair of papers describing the experiments will appear in the October 11 issue of the APS journal Physical Review Letters.

In order to observe the flow that microorganisms produce, researchers at the University of Cambridge tracked the motion of tiny tracer beads suspended in the fluid surrounding the tiny swimmers. They used the technique to study the fluid around two very different types of creatures: a small, blue-green form of algae called Chlamydomonas reinhardtii that swims by paddling with a pair of whip-like flagella, and the larger, spherical alga Volvox carterii that propels itself with thousands of flagella covering its surface. The tracer beads showed that the two types of organisms generate distinctly different flow patterns, both of which are much more complex than previously assumed. In a related study performed at Haverford College in Pennsylvania, researchers used a high speed camera to track the flow of tracer particles around Chlamydomonas in a thin, two-dimension film of fluid over the course of a single stroke of its flagella.

The studies should help scientists develop new models to predict the fluid motions associated with aquatic microorganisms. The models will provide clearer pictures of the ways microbes mix bodies of water, and potentially offer insights into the role plankton plays in the carbon cycle as it stirs the world's oceans. David Saintillan (University of Illinois at Urbana Champagne) gives an overview of the microorganism swimming research in a Viewpoint article in the October 11 edition of APS Physics (physics.aps.org). Advance copies of the Physical Review Letters articles and the related Physics Viewpoint are available to journalists on request.

Also in Physics: LHC takes the reins of high energy particle physics

The Large Hadron Collider (LHC) has just begun collecting data from colliding bunches of protons, and is still running at only half its design limits, but after a few months of operation it has already surpassed some of the major accomplishments of its predecessor the Fermilab particle accelerator laboratory in Batavia Illinois. The LHC's first achievements put tighter limits on extensions of the highly successful Standard Model of physics, which describes the currently known subatomic particles. A Synopsis describing the landmark publication of the LHC's early results will appear in the October 11 edition of Physics. Advance copies of the Physical Review Letters article describing the research, and the associated Physics Synopsis, are available on request.


'/>"/>

Contact: James Riordon
riordon@aps.org
301-209-3238
American Physical Society
Source:Eurekalert  

Related biology news :

1. Swimming upstream: Molecular approaches to better understand male infertility
2. Biosensors reveal how single bacterium gets the message to split into a swimming and a stay-put cell
3. Traveling microorganisms
4. NTU and UNSW open joint center to study microorganisms for water and environment technologies
5. Microorganisms in toxic groundwater fine-tuned to survive
6. K-State host to workshop on rapid methods to detect microorganisms in food
7. Scientists work to plug microorganisms into the energy grid
8. LSU gets to the bottom of things -- in Antarctica
9. Explore the science of familiar things -- and discover the Joy of Chemistry
10. Remembrance of things past influences how female field crickets select mates
11. 4,000-year-old coral beds among worlds oldest living things, prof says
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Swimming microorganisms stir things up, and the LHC takes over
(Date:1/20/2016)... , Jan. 20, 2016  Synaptics Incorporated (NASDAQ: ... interface solutions, today announced sampling of S1423, its ... wearables and small screen applications including smartwatches, fitness ... Supporting round and rectangular shapes, as well as ... performance with moisture on screen, while wearing gloves, ...
(Date:1/13/2016)... 2016 --> ... market report titled - Biometric Sensors Market - Global Industry ... 2023. According to the report, the global biometric sensors market was valued ... reach US$1,625.8 mn by 2023, expanding at a CAGR ... volume, the biometric sensors market is expected to reach ...
(Date:1/11/2016)... Jan. 11, 2016  higi, the leading retail ... retail locations, web and mobile, today announced it ... from existing investors. --> ... to further innovate higi,s health platform – its ... portal – including expanding services and programs to ...
Breaking Biology News(10 mins):
(Date:2/10/2016)... ASAE is introducing a hybrid membership model which will ... of joining or renewing through an organizational purchasing model. ... every employee in any size association or AMC office ... member benefits.   John H. Graham, IV ... allow organizations of any size and their employees to ...
(Date:2/10/2016)... plc (NYSE: AGN ) a leading global pharmaceutical ... CEO and President, will be featured as the keynote ... Capital Markets Healthcare Conference on Tuesday, February 23, 2016 ... Hotel in New York, NY . ... accessed on Allergan,s Investor Relations web site at ...
(Date:2/10/2016)... ... February 10, 2016 , ... HOLLOWAY AMERICA, ... Pharmaceutical Engineering (ISPE) Rocky Mountain Chapter 21st Annual Vendor Exhibition on Thursday, February ... than 100 tables for its annual event, which will run from 3:00 p.m. ...
(Date:2/10/2016)... San Mateo, CA (PRWEB) , ... February 10, ... ... Registry of Multiplex Testing (PROMPT), a research registry built on the secure online ... in September 2014. More than 1,600 participants have joined the PROMPT study, which ...
Breaking Biology Technology: