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  • field's
  • The turtles can perceive both the magnetic field's intensity and its inclination angle, the angle that the field lines make with respect to the Earth's surface, earlier research has shown. (nytimes.com)
  • Work published in Science ( abstract ) shows that individual cells seem to encode information on a magnetic field's direction, intensity and polarity. (slashdot.org)
  • exposure
  • Exposure of mice to a magnetic field of seven Tesla per day over the total period of their embryonic development did not result in behavioural abnormalities or differences in emotional behaviour (anxiety, depression) or cognitive behaviour (working memory, long-term memory) in the young adult age. (bfs.de)
  • structures
  • Studies of cosmic magnetic fields have a long history and are driven by the need to explain what is observed and the desire to know what role magnetic fields play in the formation and evolution of cosmic structures ranging from stars and galaxies to superclusters and even the universe. (hindawi.com)
  • strongest
  • For instance, in a compact bar magnet or " dipole ," field lines spread out from one pole and converge towards the other, and of course, the magnetic force is strongest near the poles where they come together. (nasa.gov)
  • hydrogen
  • If, even with this magnetic field, we are losing hydrogen and water, that would suggest the palaeo-Earth in its infant state must have had more water than we think about today. (redorbit.com)
  • evidence
  • Scientists have uncovered evidence contained within South African rocks which shows that a weak magnetic field was present on Earth nearly 3.5 billion years ago. (redorbit.com)
  • Tarduno and his colleagues told Amos that they are now hoping to study volcanic rocks in Africa, India, and Australia to find evidence that the global magnetic field is older still. (redorbit.com)
  • They believe that they could someday find evidence proving the existence of the magnetic field 3.6 to 4 billion years ago. (redorbit.com)
  • Although there seems to have been no previous suggestion that the +1 oxidation state of Mg can mediate ATP production and scant evidence that Mg has any biologically relevant redox chemistry, the general idea that magnetic nuclei and applied magnetic fields can alter the coherent spin dynamics of radical pairs and therefore affect reaction rates and product yields is beyond doubt ( 8 ). (pnas.org)
  • In the past five years, epidemiological evidence has accumulated that the oscillating magnetic fields generated by electrical supply cables may damage the health of those living or working under them. (newscientist.com)
  • cardiac
  • Notices must be posted where appropriate to warn staff of the presence of the magnetic field and of the possibility that it may affect the functioning of cardiac pacemakers and other electronic or metal equipment. (warwick.ac.uk)
  • I've never been near a field that would cause the cardiac problems you're describing. (physicsforums.com)
  • diffusion
  • With the constant field added, there is only energization at long timescales, and although not completely conclusive, it looks to eventually undergo normal diffusion in energy. (mit.edu)
  • angle
  • While for low energies the asymtotic LE do not depend on initial particle position or angle with respect to the local magnetic field line, these parameters are important for higher energies. (mit.edu)
  • measurements
  • The other, which I will call the empirical model, is to use the known value of the field at some set of points, as a basis for guessing what the value would be, at points where no measurements were made. (talkorigins.org)
  • direction
  • You can't "mark" a location using magnetic sense - because all a compass gives you is a direction, not a position. (slashdot.org)
  • The electric and magnetic fields alternate direction at the same rhythm as the current. (bfs.de)
  • They presumably sense the north-south direction of the field and use that as a reference to find the direction they need to fly. (newscientist.com)
  • The irradiation portion irradiates irradiation light including linearly polarized light adjusted so that the vibration direction of an electric field coincides with the axis direction of the magnetic shield onto the gaseous atoms sealed in the gas cell along a direction perpendicular to the axis of the magnetic shield. (google.de)
  • If at any point on such a line we place an ideal compass needle, free to turn in any direction (unlike the usual compass needle, which stays horizontal--such needles exist, see bottom of page) then the needle will always point along the field line (drawing below). (nasa.gov)
  • strongly
  • The physics of strongly interacting matter in an external magnetic field is presently emerging as a topic of great cross-disciplinary interest for particle, nuclear, astro- and condensed matter physicists. (springer.com)
  • practice
  • In practice, the magnetic field is measured constantly at a number of official magnetic observatories all over the world, as well as at universities, or by other scientific teams and expeditions, and now several spacecraft measure the field well above the Earth, and out into deep space. (talkorigins.org)
  • electric field
  • An electric field is produced as soon as voltage is applied to an appliance or wire. (bfs.de)
  • When current flows, a magnetic field is produced in addition to the electric field . (bfs.de)
  • Similarly, an " electric field " is the space in which electric forces may be sensed--for instance between metal objects charged (+) and (-) by a battery, as in the drawing accompanying the discussion of the electron . (nasa.gov)
  • A pure electric field in one reference frame is observed as a combination of both an electric field and a magnetic field in a moving reference frame. (phys.org)
  • suggests
  • The new study suggests that the turtles learned their home beach's distinctive magnetic signature, through what is called geomagnetic imprinting. (nytimes.com)
  • interactions
  • In more than 10 papers dating back to 2005, including one in PNAS ( 3 ), BK have reported effects of magnetic interactions on the rate of enzymatic synthesis of ATP in vitro. (pnas.org)
  • Although there is little competition for the title, the RPM is arguably the most plausible mechanism by which weak magnetic interactions might affect biochemical reactions. (pnas.org)
  • They provide proof that small-scale magnetic fields are unable to outlive the prerecombination era dominated by high resistivity due to recurrent electron-photon interactions. (hindawi.com)
  • Experimental
  • Acknowledged for more than 30 y to be responsible for a multitude of magnetic effects on chemical reaction rates and yields, the RPM has been implicated in several experimental observations of biomolecular magnetic field effects (MFEs). (pnas.org)
  • These models are actively tested and refined until they match the observed field to within the limits set by natural and unavoidable experimental uncertainties. (talkorigins.org)
  • theory
  • Consequently, inference of magnetic fields in the photosphere, and especially in the chromosphere, is crucial to deepen our understanding not only for solar phenomena such as chromospheric and coronal heating, flares or coronal mass ejections, but also for fundamental physical topics like dynamo theory or atomic physics. (springer.com)
  • Last but not least, an important new theoretical tool that will be revisited and which made much of the progress surveyed in this book possible is the holographic principle - the correspondence between quantum field theory and gravity in extra dimensions. (springer.com)
  • probe
  • Further more, could these fields be used to probe the internal structure of other planets like Mercury, a notoriously difficult subject? (slashdot.org)
  • turtles
  • Loggerhead turtles are known to use the earth's magnetic fields to nest on Florida's Gulf beaches within about 40 to 50 miles of where they were born decades earlier. (nytimes.com)
  • Sea turtles use the earth's magnetic fields to navigate back to the area where they were born decades earlier, according to a new study that used loggerhead genetics to investigate their travels. (nytimes.com)
  • By using previously reported genetic information from more than 800 nesting Florida loggerheads, Dr. Lohmann and Mr. Brothers were able to show that there was more genetic similarity among turtles that nest on beaches with similar magnetic signatures than there was among turtles that nest on beaches that were physically close to each other. (nytimes.com)
  • With magnetic fields running across the peninsula, individual turtles might be making navigational errors and nesting on beaches that are magnetically similar to their home beach, but on opposite coasts, he said. (nytimes.com)
  • Theoretically, turtles might be encouraged to nest on certain beaches if the magnetic field of hatchlings were manipulated to convince them that they were born in a different location. (nytimes.com)
  • presence
  • Prosthetic joint infection is a major challenge in the field of joint arthroplasty due to the presence of bacterial biofilm on infected implants. (utsouthwestern.edu)
  • spin
  • Bulaevskiip L.N., Buzdin A.I., Khomskii D.I. (1979) Spin-Peierls transition in magnetic field. (springer.com)
  • As outlined, the hyperfine interaction of the magnetic 25 Mg isotope in a radical pair comprised of a Mg + ion and an ADP radical is thought to flip the electron spin of the former, opening up a reaction pathway that would otherwise be insignificant and favoring the catalytic reaction over the unproductive back reaction. (pnas.org)
  • mechanism
  • Studies of cosmic magnetic fields are often classified as either (i) dealing with the origin, i.e., magneto-genesis , or (ii) dealing with growth or amplification, say, via a dynamo mechanism. (hindawi.com)
  • higher
  • I have found that when stepping out into areas with higher amplitude eletrical fields, I get a strange feel where my chest feels heavy and breathing becomes more difficult. (physicsforums.com)
  • solar
  • Magnetic fields in both active and quiet regions are the main coupling agent between the outer layers of the solar atmosphere, and are therefore not only involved in the structuring of these layers, but also for the transport of energy from the solar surface through the corona to the interplanetary space. (springer.com)