Navigation Links
Paramecia adapt their swimming to changing gravitational force

For many single-celled organisms living in water, the force is always against them. The classic example is the slipper-shaped paramecium, which consistently swims harder going up than going down, just to keep from sinking. Now physicists Karine Guevorkian and James Valles of Brown University have worked out a way to turn gravity on its head and see how the creatures respond.

The researchers placed a vial with pond water and live paramecia inside a high-powered electromagnet at the National High Magnetic Field Laboratory in Tallahassee, Fla. The organisms are less susceptible to a magnetic field than plain water is, so the magnetic field generated inside the vial "pulls" harder on the water than on the cells. If the field is pulling down, the cells float. If it's pulling up, they sink.

Using water alone, Valles and Guevorkian were able to increase the effect of gravity by about 50 percent. To increase the effect even further, they added a compound called Gadolinium-diethylene-triamine-pentaacetate (Gd-DTPA) to the water. Gd-DPTA is highly susceptible to induced magnetic fields such as those generated in electromagnets. This allowed the researchers to make the water much "heavier" or "lighter," relative to the paramecia, achieving an effect up to 10 times that of normal gravity. The magnetic field is continuously adjustable, so Valles and Guevorkian were also able to create conditions simulating zero-gravity and inverse-gravity.

By dialing the magnetic field up or down, the researchers could change the swimming behavior of the paramecia dramatically. In high gravity, the organisms swam upward mightily to maintain their place in the water column. In zero gravity, they swam up and down equally. And in reverse gravity, they dove for where the sediments ought to be.

"If you want to make something float more," said Valles, "you put it in a fluid and you pull the fluid down harder than you pull the thing down. And that's what we basically do
'"/>

Source:Brown University


Page: 1 2

Related biology news :

1. Highly adaptable genome in gut bacterium key to intestinal health
2. Low level of extinction during ice age linked to adaptability
3. 15 generations of untrained jocks, couch potatoes show big physiological adaptations
4. Otter adaptations: How do otters remain sleek and warm
5. Retina adapts to seek the unexpected, ignore the commonplace
6. Plant genes identified that can form basis for crops better adapted to environmental conditions
7. CO2 sensing proves critical for fungal pathogens to adapt to life in air and human hosts
8. Scientists find mutations that let bird flu adapt to humans
9. Asexual worm quickly adapts to soil contamination
10. Priming embryonic stem cells to fulfill their promise
11. Protein offers way to stop microscopic parasites in their tracks
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Paramecia adapt their swimming changing gravitational force

(Date:9/2/2015)... NEW YORK , Sept. 2, 2015 /PRNewswire/ ... a key concern for enterprises, banks, government organizations, ... badges, and numeric keypads were previously being used ... the introduction of two-factor authentication, wherein individuals could ... using two different components, such as hardware devices ...
(Date:8/31/2015)... DUBLIN , Aug. 31, 2015 Research ... of the "Saudi Arabia Biomedical Sensors Market - ... offering. The Saudi Arabia Biomedical Sensors ... a CAGR of 3.64% over the period 2014-2020 ... are adaptable to the genetic formulation of each individual. ...
(Date:8/24/2015)... , August 24, 2015 The consulting ... ,s largest biometrics manufacturer DERMALOG and its customized solutions and ... African Biometrics Company of the Year Award". DERMALOG is particularly ... .   -Cross reference: Picture is available ... - On Thursday evening, in South ...
Breaking Biology News(10 mins):Global Biometrics Spending Market in the Government Sector 2015-2019 2Global Biometrics Spending Market in the Government Sector 2015-2019 3Saudi Arabia Biomedical Sensors Market Report 2015 - Growth, Trends & Forecasts (2014-2020) 2Frost & Sullivan Honors DERMALOG with Biometrics Prize for Achievements in Africa 2Frost & Sullivan Honors DERMALOG with Biometrics Prize for Achievements in Africa 3
... How do the French get away with a clean bill ... Scientists have long suspected that the answer to the so-called ... a new study bring them closer to understanding why. ... Library of Science (PLoS) ONE, researchers from industry and academia, ...
... German . Leipzig. Europe requires ... reconcile nature conservation and fishing interests. An effective regulation ... level, researchers from the Helmholtz Centre for Environmental Research ... they suggest a five-step action plan, which would start ...
... 2 Atmel(R) Corporation (Nasdaq:,ATML), an inventor and ... today that its FingerChip(R) fingerprint sensor,solution has been ... LCD PC.,Rise will showcase this biometrics-capable LCD PC ... solution as a standard feature enhances consumer,friendliness in ...
Cached Biology News:Substance in red wine found to keep hearts young 2Substance in red wine found to keep hearts young 3The cormorant -- the 'black plague' or an example of successful species conservation? 2The cormorant -- the 'black plague' or an example of successful species conservation? 3The cormorant -- the 'black plague' or an example of successful species conservation? 4The cormorant -- the 'black plague' or an example of successful species conservation? 5Atmel's FingerChip Biometric Sensor Selected by Rise Computer for its Robust Security 2Atmel's FingerChip Biometric Sensor Selected by Rise Computer for its Robust Security 3
(Date:9/2/2015)... Research and ... addition of Jain PharmaBiotech,s new report ... to their offering. The scope ... in situ hybridization (FISH), comparative genomic hybridization ... application of nanobiotechnology, microarrays, real-time polymerase chain ...
(Date:9/2/2015)... SYDNEY , Sept. 2, 2015 Australian ... won a prestigious Australian science prize recognising ,outstanding, science ... on track to globally launch a novel prostate cancer ... of a high level consortium taking out the peer-reviewed ... Interdisciplinary Scientific Research. This prize is ...
(Date:9/2/2015)... Israel , September 2, 2015 ... announced the intent of the National Institute of Allergy and ... Health (NIH) within the Department of Health and Human Services ... held in the United States in ... BiondVax,s universal flu vaccine candidate, Multimeric-001 (M-001), as a primer ...
(Date:9/2/2015)... ... September 02, 2015 , ... ... efficiency of their entire waste to energy process and continue to contribute to ... Major Upgrade , Temarry’s Waste to Energy process has been operating at their ...
Breaking Biology Technology:Global Cytogenetics Technologies Study 2015-2025 - Latest Markets and Companies Analysis 2Global Cytogenetics Technologies Study 2015-2025 - Latest Markets and Companies Analysis 3Prostate Cancer Company Minomic Wins Prestigious Eureka Science Prize 2Prostate Cancer Company Minomic Wins Prestigious Eureka Science Prize 3BiondVax Announces Intent to Launch a Phase 2 Trial in the United States in Collaboration with the U.S. National Institutes of Health 2BiondVax Announces Intent to Launch a Phase 2 Trial in the United States in Collaboration with the U.S. National Institutes of Health 3Temarry Recycling’s New $100,000 Waste to Energy Renovation 2
... , by researchers at Rothamsted Research (an institute of ... and the Universities of Exeter, Greenwich and York, sheds ... to undertake long-distance migrations, and highlights the remarkable abilities ... British winters by migrating south in autumn to over-wintering ...
... at the National Institute of Standards and Technology (NIST) have ... on a single aluminum atom that is now the world,s ... previous pacesetter based on a mercury atom. The ... in about 3.7 billion years, according to measurements to be ...
... , SCOTTSDALE, Ariz. , Feb. 4 ... of modern-day cancer care in community oncology practices revealed that ... chemotherapy and providing related infusion room services to seniors with ... as treatment planning, care coordination, and follow-up care planning -- ...
Cached Biology Technology:Migrating insects fly in the fast lane 2NIST's second 'quantum logic clock' based on aluminum ion is now world's most precise clock 2NIST's second 'quantum logic clock' based on aluminum ion is now world's most precise clock 3Study: Medicare Covers Only Half the Cost of Administering Chemotherapy to Seniors with Cancer 2Study: Medicare Covers Only Half the Cost of Administering Chemotherapy to Seniors with Cancer 3Study: Medicare Covers Only Half the Cost of Administering Chemotherapy to Seniors with Cancer 4
... imaging and analysis system is an integrated ... rapid acquisition and analysis of fluorescence images ... is fast. Scanning an entire 384-well plate ... with two fluorescence images per well, takes ...
...
... offer a full range of peptide synthesis ... include: Peptide synthesis, crude product (approximately ... purified product (70-95% pure) ... myristylation, phosphorylation, and rhodamine) Conjugations ...
... CLS number is a new ... match Cornings product number. If ... order under the old Sigma-Aldrich ... service for assistance. Material: ...
Biology Products: