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  • magnetism
  • Magnetism in bar magnets and electromagnets does not arise from magnetic monopoles, but from electric charges (i.e. electric monopoles) carrying intrinsic angular momentum (i.e. spin ) and/or [extrinsic] angular momentum, yielding magnetic dipoles . (wikipedia.org)
  • Many early scientists attributed the magnetism of lodestones to two different "magnetic fluids" ("effluvia"), a north-pole fluid at one end and a south-pole fluid at the other, which attracted and repelled each other in analogy to positive and negative electric charge . (wikipedia.org)
  • However, an improved understanding of electromagnetism in the nineteenth century showed that the magnetism of lodestones was properly explained by Ampère's circuital law , not magnetic monopole fluids. (wikipedia.org)
  • Gauss's law for magnetism , one of Maxwell's equations , is the mathematical statement that magnetic monopoles do not exist. (wikipedia.org)
  • Therefore, the ordinary phenomena of magnetism and magnets have nothing to do with magnetic monopoles. (wikipedia.org)
  • Deoxygenated hemoglobin (dHb) is more magnetic ( paramagnetic ) than oxygenated hemoglobin (Hb), which is virtually resistant to magnetism ( diamagnetic ). (wikipedia.org)
  • earth's
  • 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)
  • 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)
  • The variation in earth's magnetic field around the nesting area seems to really predict genetic differentiation much better than geographic distance. (nytimes.com)
  • They are the main source of hardness in hard magnets , the carriers of magnetic storage in tape drives , and the best recorders of the ancient Earth's magnetic field (see paleomagnetism ). (wikipedia.org)
  • stripe
  • After its introduction, the magnetic stripe card quickly became entrenched within modern culture. (ibm.com)
  • The credit card-and its signature magnetic stripe-figures prominently in transaction scenes in countless movies, making its celluloid debut in the 1963 comedy The Man from the Diner's Club , starring Hollywood legend Danny Kaye. (ibm.com)
  • NEW YORK , Nov. 16, 2016 /PRNewswire/ -- This report presents a strategic analysis of the magnetic stripe cards market in Western Europe and a forecast for its development in the medium term. (prnewswire.com)
  • The purpose of the report is to describe the state of the magnetic stripe cards market in Western Europe , to present actual and retrospective information about the volumes, dynamics, structure and characteristics of production, imports, exports and consumption and to build a forecast for the market in the next five years. (prnewswire.com)
  • If you are interested in the magnetic stripe cards market in Western Europe , this research report will provide you with a strategic analysis of the market, its recent and future development. (prnewswire.com)
  • theoretical
  • In some theoretical models , magnetic monopoles are unlikely to be observed, because they are too massive to be created in particle accelerators (see § Searches for magnetic monopoles below), and also too rare in the Universe to enter a particle detector with much probability. (wikipedia.org)
  • quantum
  • The quantum theory of magnetic charge started with a paper by the physicist Paul A. M. Dirac in 1931. (wikipedia.org)
  • The development of MCD really began in the 1930s when a quantum mechanical theory of MOR (magnetic optical rotatory dispersion) in regions outside absorption bands was formulated. (wikipedia.org)
  • theories
  • Classical theories of electromagnetism, represented by Maxwell's equations, disallow magnetic monopoles. (wikipedia.org)
  • Early theories of magnetization in ferromagnets assumed that ferromagnets are divided into magnetic domains and that the magnetization changed by the movement of domain walls . (wikipedia.org)
  • particle
  • A magnetic monopole cannot be created from normal matter such as atoms and electrons , but would instead be a new elementary particle . (wikipedia.org)
  • All matter ever isolated to date, including every atom on the periodic table and every particle in the standard model , has zero magnetic monopole charge. (wikipedia.org)
  • It therefore has the largest possible magnetic moment for a particle of that size and composition. (wikipedia.org)
  • known
  • Some condensed matter systems propose a structure superficially similar to a magnetic monopole, known as a flux tube . (wikipedia.org)
  • strong
  • Magnetic circular dichroism (MCD) is the differential absorption of left and right circularly polarized (LCP and RCP) light, induced in a sample by a strong magnetic field oriented parallel to the direction of light propagation. (wikipedia.org)
  • You'll also be asked questions to make sure your child doesn't have any internal metal clips from previous surgery or anything else that might cause a problem near a strong magnetic field. (kidshealth.org)
  • Because the strong magnetic field employed in MRA can interact with anything else that contains metal, it is crucial that the patient remove any jewelry, including from any piercings, prior to undergoing MRA. (encyclopedia.com)
  • Thus
  • Thus there is not the same direct relation between magnetic optical activity and molecular stereochemistry which would be expected, because it is found in natural optical activity. (wikipedia.org)
  • Thus, the higher the magnetic field the better the NMR spectrometer. (encyclopedia.com)
  • electromagnets
  • The French got to the point of building a 100km magnetic railroad and it worked (though the electromagnets needed to be cooled at over -100 degrees centrigrade) but the system was never actually used because simulations showed that if the train shut down and that there was a 100km/h latteral wind it would fall over. (halfbakery.com)
  • Research
  • Ongoing research: The use of magnetic shock absorbers to generate electricity from those bumps in the road. (halfbakery.com)
  • The French have been doing research on magnetic trains for quite a while. (halfbakery.com)
  • In a presentation exploring the promise of magnetic nanoparticle (mNP) hyperthermia in breast cancer treatment, Dartmouth researcher P. Jack Hoopes, DMV, PhD, reviewed preclinical studies conducted at Norris Cotton Cancer Center and discuss plans for early-phase clinical studies in humans at the annual meeting of the American Association for Cancer Research (AACR). (news-medical.net)
  • Technology
  • Researchers from the General Physics Institute of the Russian Academy of Sciences and Moscow Institute of Physics and Technology have developed a new biosensor test system based on magnetic nanoparticles. (news-medical.net)
  • news
  • Since 2009, numerous news reports from the popular media have incorrectly described these systems as the long-awaited discovery of the magnetic monopoles, but the two phenomena are only superficially related to one another. (wikipedia.org)
  • book
  • Further to this issue: There is an excellent review book on magnetic stimulation : Chokroverty, S.(ed.) (1990) Magnetic Stimulation in Clinical Neurophysiology. (bio.net)
  • signal
  • This difference leads to an improved MR signal since the diamagnetic blood interferes with the magnetic MR signal less. (wikipedia.org)
  • electric
  • In this paper, Dirac showed that if any magnetic monopoles exist in the universe, then all electric charge in the universe must be quantized (Dirac quantization condition). (wikipedia.org)
  • different
  • 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)
  • signature
  • The new study suggests that the turtles learned their home beach's distinctive magnetic signature, through what is called geomagnetic imprinting. (nytimes.com)
  • properties
  • They differ in terms of their inherent material and size dependent physiochemical properties, for example, their optical and magnetic properties. (news-medical.net)
  • effects
  • Also, some indication of the 'non-muscular' effects of magnetic stimulation are provided in a chapter by Amassian, Maccabee, Cracco and Cracco. (bio.net)
  • similar
  • 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)
  • optical
  • It was first shown by Faraday that optical activity (the Faraday effect) could be induced in matter by a longitudinal magnetic field (a field in the direction of light propagation). (wikipedia.org)
  • made
  • The recording medium for the tape recording process is typically made by embedding tiny magnetic oxide particles in a plastic binder on a polyester film tape. (gsu.edu)