radio frequencies are required at times. Since the results of the ENDOR gives the coupling resonance between the nuclei and the unpaired electron, the relationship between them can be determined. See also Electric dipole spin resonance Ferromagnetic resonance Dynamic nuclear polarisation Spin label Site-directed spin labeling Spin trapping EDMR Optically detected magnetic resonance Electron resonance imaging References External links Electron Magnetic Resonance Program National High Magnetic Field Laboratory Electron Paramagnetic Resonance (Specialist Periodical Reports) Published by the Royal Society of Chemistry Using ESR to measure free radicals in used engine oil Scientific techniques Magnetism Russian inventions Neuroimaging Soviet inventions