Loading...
  • 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)
  • strengths
  • Sample handling tool should be used where possible - to increase distance from / reduce time spent adjacent to high field strengths. (warwick.ac.uk)
  • A main challenge with this situation is generating a homogeneous magnetic field over a sufficiently large sample area: it is not feasible to generate field strengths necessary to make conventional high-resolution NMR measurements. (lbl.gov)
  • resonance
  • A particularly beautiful aspect of magnetic resonance is its ability to gently peer within intact objects, but it's tough to do that from far away. (lbl.gov)
  • The problem with its use in inductively-detected MRI [MRI - magnetic resonance imaging - is NMR's technological sibling] is that you need a magnetic field that's both strong and homogeneous, so you need to surround the whole subject with superconducting coils, which is not something that's possible in an application like oil-well logging. (lbl.gov)
  • Sensitivity of magnetic resonance depends profoundly on the magnetic field, because the field causes the detected spins to align slightly," adds Bajaj. (lbl.gov)
  • In high-field NMR, the chemical properties of a sample are determined from their resonance spectrum, but this is not possible without either extremely high fields or extremely long-lived coherent signals (neither of which are possible with permanent magnets). (lbl.gov)
  • irradiation
  • A magnetic field measurement apparatus includes an irradiation portion, a gas cell, a measurement unit (polarization separation unit, light receiving portion, signal processing circuit), and a magnetic shield. (google.de)
  • 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)
  • Gold nanoparticles were heated by irradiation of a radiofrequency magnetic field (RFMF), leading to denaturation of a DNA and leaves the surrounding molecules relatively unaffected. (hindawi.com)
  • birds
  • He added that the same concepts may be applicable for restoring salmon and other fish to rivers because many birds and fish also use magnetic fields for navigation. (nytimes.com)
  • evidence
  • 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)
  • 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)
  • signatures
  • 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)
  • probes
  • In ex situ NMR measurements, the geometry of a typical high-field experiment is reversed such that the detector probes the sample surface, and the magnetic field is projected into the object. (lbl.gov)
  • geomagnetic
  • The new study suggests that the turtles learned their home beach's distinctive magnetic signature, through what is called geomagnetic imprinting. (nytimes.com)
  • Without the geomagnetic field, for example, life on Earth as we know it would not be possible. (springer.com)
  • poles
  • 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)
  • exposure
  • The exposure of the population to low- frequency fields is, therefore, usually low. (bfs.de)
  • lines
  • Magnetic field lines similarly describe the structure of magnetic fields in three dimensions.They are defined as follows. (nasa.gov)
  • Magnetic field lines were introduced by Michael Faraday (1791-1867) who named them "lines of force. (nasa.gov)
  • Faraday, however, felt that they represented more, that space containing magnetic "lines of force" was no longer empty but acquired certain physical properties. (nasa.gov)
  • Simultaneously observed precipitating particle spec- trograms and auroral images from Defense Meteorological Satellite Program (DMSP) satellites are consistent with the detected FACs and indicate that they occur on closed field lines mostly adjacent to the auroral oval. (thunderbolts.info)
  • strong
  • What properties beyond demagnetization are changed after steel is subjected to strong AC magnetic fields? (madsci.org)
  • In 1969, Apollo 11 astronauts (Buzz Aldrin shown here) collected moon-surface basalt samples which turned out to have been magnetized in a magnetic field that was about as strong as earth's. (creation.com)
  • high
  • This well-developed method is called high-field NMR. (lbl.gov)
  • From left) Alex Pines, Dmitry Budker and Scott Seltzer led a proof-of-concept NMR experiment using a high-sensitivity magnetometer and a magnetic field comparable to that of the Earth. (lbl.gov)
  • So Suavet's 0.16 Ga extension of the duration of high magnetic fields on the moon would actually only represent, at most, a very short period of time, during, or not long after, Creation Week. (creation.com)
  • processes
  • One way, which I will call the physical model, is to derive the form of the field directly from the equations that govern the physical processes by which the field is generated. (talkorigins.org)
  • planets
  • Further more, could these fields be used to probe the internal structure of other planets like Mercury, a notoriously difficult subject? (slashdot.org)
  • The universe is highly magnetic, with everything from stars to planets to galaxies producing their own magnetic fields. (phys.org)
  • spacecraft
  • 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)
  • within minutes they overlapped over Earth's equator to create the biggest magnetic breach ever recorded by Earth-orbiting spacecraft. (bibliotecapleyades.net)
  • turtles
  • 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)
  • moon
  • The statistical errors estimated for the dates range from ±0.05 Ga to ±0.1 Ga. All moon rocks dated as more recent than about 3.4 Ga ago apparently saw much lower fields, from about 0.1 Gauss down to 0.01 Gauss. (creation.com)
  • direction
  • 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)
  • 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)
  • 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)
  • area
  • The gas cell, in which gaseous atoms are sealed, is disposed in a hollow area of the magnetic shield. (google.de)
  • structure
  • have reported remote electronic control of the DNA structure by inductive coupling of a radiofrequency magnetic field to a metal nanocrystal covalently linked to DNA [ 7 ]. (hindawi.com)
  • uses
  • This ingenious method uses an infinite sum of trigonometric functions to evaluate a field, on the surface of a sphere embedded in the field. (talkorigins.org)