Navigation Links
A model photochemical compass for bird navigation
Date:4/30/2008

tudied intensively, they are not completely understood.

One existing theory is that photoreceptors in a bird's retina absorb light, which causes a chemical reaction that, in turn, produces a short-lived photochemical species whose lifetime is sensitive to the magnitude and direction of a weak magnetic field.

The photoreceptor theory is supported by the fact that blue light photoreceptors have been detected in retinas of migratory birds when they perform magnetic orientation. However, it has not been confirmed in the field or the lab that a magnetic field as weak as Earth's can produce detectable changes within a photochemical molecule; nor, has a photochemical molecule been shown to respond to the direction of such a magnetic field until now.

The U.S. and U.K. researchers have demonstrated that a synthesized photochemical molecule composed of linked carotenoid, porphyrin and fullerene units can act as a magnetic compass. Carotenoid is an organic pigment that occurs naturally in plants and other photosynthetic organisms. Porphyrin is similar to a chlorophyll molecule and exists in green leaves and red blood cells. Fullerene is composed entirely of carbon, and a spherical fullerene is known as a "buckyball."

Under normal conditions, each of the outer electron orbitals of the linked carotenoid (C), porphyrin (P) and fullerene (F) units contain two paired electrons. In the pair, the magnetic "north" pole of one electron is matched with the magnetic "south" pole of the other, causing it to be non-magnetic. As all of its electrons are paired, the CPF molecule has a neutral charge and exists in its lowest energy or ground state. Alternatively, when a CPF molecule is exposed to light, porphyrin absorbs the light energy and moves into a higher energy or excited state.

Porphyrin's excited state induces a carotenoid electron to leave its partner electron and move to fullerene's outer orbital. Since the transfer of the
'/>"/>

Contact: Jennifer Grasswick
jgrasswi@nsf.gov
703-292-4972
National Science Foundation
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Novel 3-D cell culture model shows selective tumor uptake of nanoparticles
2. A new kind of rat model
3. JILA finds flaw in model describing DNA elasticity
4. Smithsonian researchers develop models to assess wetland health
5. Prediction of RNA pseudoknots using heuristic modeling with mapping and sequential folding
6. Simulating kernel production influences maize model accuracy
7. MIT model could improve some drugs effectiveness
8. Model for the assembly of advanced, single-molecule-based electronic components developed at Pitt
9. Improving detection of nuclear smuggling goal of computer model of mechanical engineer
10. New chimeric mouse model for human liver diseases, drug testing
11. Study finds first-ever genetic animal model of autism
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
A model photochemical compass for bird navigation
(Date:1/22/2015)... and POINT ROBERTS, Washington , January ... covering leading sectors including technology and tech stocks, releases video ... featuring master pickpocket and security consultant Apollo Robbins . ... and talks about the Wocket™ biometric smart wallet, a product ...
(Date:1/22/2015)... Infinisource has launched its new NXG series of time clocks ... a higher standard for collecting attendance and labor data and ... installation, touch screen interface and seamless connection to cloud-based iSolved, ... solution for the small to mid-size employer. The ...
(Date:12/19/2014)... Research and Markets ( http://www.researchandmarkets.com/research/8kmfcn/iphone_5s ) has ... Sensor - Apple/AuthenTec TMDR92 & Sapphire - Technology Report" ... http://photos.prnewswire.com/prnh/20130307/600769 Following the acquisition of ... feature with the iPhone 5S. It is currently the ...
Breaking Biology News(10 mins):Apollo Robbins Talks about the Illusion of Personal Safety and How Easily Your Wallet is Stolen; If a Wocket Wallet is Stolen the Thief Can't do Anything With it! 2Apollo Robbins Talks about the Illusion of Personal Safety and How Easily Your Wallet is Stolen; If a Wocket Wallet is Stolen the Thief Can't do Anything With it! 3Infinisource's NXG series sets new time clock standard 2iPhone 5S Fingerprint Sensor - Apple/AuthenTec TMDR92 & Sapphire - Technology Report 2
... rex was far from a plodding Cretaceous era scavenger whose ... freakishly big head. T. rex ,s athleticism (and ... Alberta graduate student Scott Persons. His extensive research shows that powerful ... hunters of its time. As Persons says, "contrary to ...
... a naturally occurring compound found in strawberries and ... motor problems and delays death in three models ... Salk Institute for Biological Studies. The study, published ... Genetics , sets the stage for further investigations ...
... Evidence from Disneyland suggests that human creativity may ... some scientists believe but as a way to help ... traditions and cultural knowledge, a new study published in ... Tourism Anthropology suggests. Evolutionary psychologist Geoffrey Miller ...
Cached Biology News:T. rex's big tail was its key to speed and hunting prowess 2Natural compound shows promise against Huntington's disease 2Natural compound shows promise against Huntington's disease 3Brain size and a trip to Disneyland 2
(Date:1/22/2015)... GenoSpace , a precision medicine software company that has developed ... of genomic, imaging and other biomedical data in research and ... , CEO of Aspera, an IBM Company, to its board ... "We are pleased to welcome Michelle ...
(Date:12/24/2014)... , Dec. 24, 2014 PlasmaTech Biopharmaceuticals, Inc. (NASDAQ: PTBI, ... announced the closing of an underwritten public offering of 3,500,000 ... an aggregate 3,500,000 shares of common stock, at an offering ... warrants have a per share exercise price of $5.00, are ...
(Date:12/24/2014)... Missouri (PRWEB) December 23, 2014 GMO corn ... company, Syngenta, are in the process of being consolidated in ... is In Re: Syngenta AG MIR 162 Corn Litigation, MDL ... of Kansas. , Management of the Syngenta GMO corn multidistrict ...
(Date:12/24/2014)... According to Ross Selinger, President of ... Global, the national office market continues to be strong, driven ... evidenced by the third quarter’s surprising 3.9% GDP, unemployment decreasing ... costs have held inflation down and the Fed is keeping ...
Breaking Biology Technology:GenoSpace Expands Board with Appointment of Michelle Munson 2PlasmaTech Biopharmaceuticals, Inc. Announces Closing of Public Offering 2PlasmaTech Biopharmaceuticals, Inc. Announces Closing of Public Offering 3Carey Danis & Lowe Reports on Syngenta GMO Corn Transfer Order 2ITRA Global Reports Long Island Is Out of Sync With The National Office Market 2ITRA Global Reports Long Island Is Out of Sync With The National Office Market 3
... ,* * * * * * * * * * * ... and the experience has only strengthened our belief that wireless and ... from the 400-plus attendees and 37 demonstrating companies was palpable throughout ... both in our homes and our businesses -- has arrived and ...
... makes. In 1999, charities had raised only $7 million via ... Red Cross. Last year, according to the Chronicle of Philanthropy, ... up to $124.5 million. , ,Charities and their for-profit ... ,In 2003, the Boys & Girls Club of Dane County and ...
... Medical College of Wisconsin, UW-Medical School, the Wisconsin Technology ... television show, Avante's Leaders in the New Economy, that ... Jeffrey Smith, clinical assistant professor of medicine with the ... by Mike Klein, founder and editorial director of the ...
Cached Biology Technology:The News From DEMOmobile 2003 2The News From DEMOmobile 2003 3Whos Starting to Profit Online? Nonprofits. 2The Information Age of Healthcare - Leaders featured on local new economy show 2The Information Age of Healthcare - Leaders featured on local new economy show 3
Mouse monoclonal [CLB-SW16 (formerly 708)] to CD42d (rating: ****) ( Abpromise for all tested applications). entrezGeneID: 2814 SwissProtID: P40197...
ANTI-HUMAN CYTOKINES, GROWTH FACTORS (polyclonal rabbit (or goat) antibodies) Human TARC - Biotin...
Goat polyclonal to Factor VIII, prediluted ( Abpromise for all tested applications). Antigen: Full length native protein (purified) (Human): Factor VIII from blood. Entrez GeneID: 2157 Sw...
Chicken polyclonal to Thioredoxin domain containing 9 ( Abpromise for all tested applications). Antigen: Full length protein (Human) Entrez Gene ID: 10190 Swiss Protein ID: O14530...
Biology Products: