Navigation Links
The magnetic sense
Date:7/10/2012

Migratory birds and fish use the Earth's magnetic field to find their way. LMU researchers have now identified cells with internal compass needles for the perception of the field and can explain why high-tension cables perturb the magnetic orientation.

Although many animal species can sense the geomagnetic field and exploit it for spatial orientation, efforts to pinpoint the cells that detect the field and convert the information into nerve impulses have so far failed. "The field penetrates the whole organism, so such cells could be located almost anywhere, making them hard to identify," says LMU geophysicist Michael Winklhofer. Together with an international team, he has located magnetosensory cells in the olfactory epithelium of the trout.

The researchers first used enzymes to dissociate the sensory epithelium into single cells. The cell suspension was then stimulated with an artificial, rotating magnetic field. This approach enabled the team to identify and collect single magnetoresponsive cells, and characterize their properties in detail. Much to Winklhofer's surprise, the cells turned out to be more strongly magnetic than previously postulated - a finding that explains the high sensitivity of the magnetic sense.

Magnetite crystals show the way

The cells sense the field by means of micrometer-sized inclusions composed of magnetic crystals, probably made of magnetite. The inclusions are coupled to the cell membrane, which is necessary to change the electrical potential across the membrane when the crystals realign in response to a change in the ambient magnetic field. "This explains why low-frequency magnetic fields generated by powerlines disrupt navigation relative to the geomagnetic field and may induce other physiological effects," says Winklhofer.

The new findings could lead to advances in the sphere of applied sciences, for example in the development of highly sensitive magnetometers. In addition, t
'/>"/>

Contact: Dr. Kathrin Bilgeri
kathrin.bilgeri@lmu.de
49-892-180-6938
Ludwig-Maximilians-Universitt Mnchen
Source:Eurekalert

Page: 1 2

Related biology news :

1. NUS-led research team discovers how bacteria sense salt stress
2. Manatee hearing good enough to sense approaching motorboats
3. A test of the senses in the search for a shoal mate
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/20/2015)... , May 20, 2015 /PRNewswire/ ... http://www.researchandmarkets.com/research/h8t4x6/5year ) has announced the addition ... the Global Iris Recognition Market"  report ... , ,This research service analyses trends ... the government and commercial sectors, globally. ...
(Date:5/18/2015)... , May 18, 2015 Fingerprint ... sensors FPC1020, FPC1025, FPC1145, FPC1155 and FPC1035 from one if ... June until and including Q3 2015 and the sensors will ... . Communicated order values for 2015 hereby amount to 740 ... Q1 2015 of 140 MSEK and a number of smaller ...
(Date:5/11/2015)... , May 11, 2015 Curemark LLC, ... the start of a new Phase III double blind, ... its novel formulation, CM-AT, on all children ages 3-8 ... its FDA Phase III double blinded clinical trial for ... low levels of the digestive enzyme chymotrypsin. This new ...
Breaking Biology News(10 mins):Global Iris Recognition Market Report 2015 - 5-Year Opportunity Analysis 2Fingerprint Cards Receives Touch Fingerprint Sensor Order of SEK 230 Million and Raises Revenue Guidance for 2015 2Curemark, LLC, Launches New Phase III Trial in Expanded Population of Children with Autism 2
... unseen details of an anthrax bacteriophage a virus that ... it infects its host, and providing an initial blueprint for ... for the detection and destruction of anthrax and other potential ... spore-binding phage 8a (or SBP8a, for short), is too ...
... University of Gothenburg,s Sahlgrenska Academy have discovered a brand new ... around the world, three of them in the Gothenburg area, ... Sweden was out kayaking when he went down with acute ... to hospital where it was found that he was also ...
... dental X-rays to predict who is at risk of fractures, ... reported in the journal Nature Reviews Endocrinology . ... Sahlgrenska Academy and Region Vstra Gtaland demonstrated that a sparse ... is linked to a greater chance of having previously had ...
Cached Biology News:Researchers reveal SBP8a configurations 2Researchers reveal SBP8a configurations 3New tick-borne disease discovered in Gothenburg 2Dental X-rays can predict fractures 2
(Date:5/21/2015)... (PRWEB) May 21, 2015 Patent Offering, ... method for diagnostic or therapeutic imaging within a body ... uses an endoscope having a low cost, single-use disposable ... filing date was October 18, 2013 and the patent ... technology enables the physician to customize the lighting and ...
(Date:5/21/2015)... , May 21, 2015 /PRNewswire/ - RepliCel ... clinical stage regenerative medicine company focused on the ... upcoming poster presentation at the International Society for ... for chronic Achilles tendinosis currently in a Phase ... May 29 th from 5:30 PM to ...
(Date:5/20/2015)... DUBLIN , May 20, 2015 Research and ... addition of the "Top Technologies in HW_Technical Insights" ... division of this report evaluated technology trends in the ... trends that are likely to have an impact in ... depth analysis of the top 10 health and wellness ...
(Date:5/20/2015)... (PRWEB) May 20, 2015 The global ... of 22.3% during the forecast period of 2015 to ... increasingly being used in drug discovery and development process ... market growth. In addition to this,heavy investments by key ... applications are also propelling market growth. Browse 113 market ...
Breaking Biology Technology:IpAuctions™ Presents The Worlds Smallest Disposable Illuminated Endoscope For Auction 2IpAuctions™ Presents The Worlds Smallest Disposable Illuminated Endoscope For Auction 3RepliCel to Present Unique Autologous Cell Treatment for Achilles Tendinosis at International Society for Cellular Therapy Conference 2RepliCel to Present Unique Autologous Cell Treatment for Achilles Tendinosis at International Society for Cellular Therapy Conference 3Top Technologies in the Health and Wellness Industry 2015 2Genotyping Market Growing at 22.3% CAGR to 2020: Research Based on Technology, Applications, Opportunities, Challenges and Key Players. 2Genotyping Market Growing at 22.3% CAGR to 2020: Research Based on Technology, Applications, Opportunities, Challenges and Key Players. 3Genotyping Market Growing at 22.3% CAGR to 2020: Research Based on Technology, Applications, Opportunities, Challenges and Key Players. 4Genotyping Market Growing at 22.3% CAGR to 2020: Research Based on Technology, Applications, Opportunities, Challenges and Key Players. 5
... Jan. 2 Bionovo, Inc.,(Nasdaq: BNVI ... that can be used to identify estrogenic drugs ... Cellular Endocrinology, showed,that the new regulatory elements can ... and allow for more,accurate prediction of specific tissue ...
... published today in the New England Journal of Medicine ... store kidneys for transplantation offers significant benefits in kidney ... a traditional "ice box", or cold storage. Unlike ... and vascular performance of the organ in real time, ...
... Therapeutics,(Nasdaq: NKTR ) today announced that ... pulmonary delivery assets, technology, and intellectual,property to Novartis ... completed,on December 31, 2008. , ... certain dry powder and,liquid pulmonary formulation and manufacturing ...
Cached Biology Technology:Bionovo Publishes Discoveries in Predictable Tissue Selectivity for Selective Estrogen Receptor Modulators Platform 2Bionovo Publishes Discoveries in Predictable Tissue Selectivity for Selective Estrogen Receptor Modulators Platform 3Study Shows Machine Perfusion Significantly Improves Transplant Results 2Study Shows Machine Perfusion Significantly Improves Transplant Results 3Nektar Announces Closing of Sale of Specific Pulmonary Delivery Assets to Novartis for $115 Million 2
... The Captivate magnetic ... can be used in conjunction ... (C-21473, C-21474, C-21476) or other ... with most 96-well microplates. Cell ...
Protein Phosphorylation...
...
The Light Diagnostics Calicivirus Genotype 1&2 Typing OligoDetect assay is applicable for the qualitative detection of calicivirus RNA generated by an in-house validated in vitro nucleic acid amplifi...
Biology Products: