| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 1,516,018,644 visitors served. |
|
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
electron paramagnetic resonance |
Also found in: Dictionary/thesaurus, Medical, Acronyms, Wikipedia, Hutchinson | 0.06 sec. |
|
electron paramagnetic resonance: see magnetic resonance magnetic resonance, in physics and chemistry, phenomenon produced by simultaneously applying a steady magnetic field and electromagnetic radiation (usually radio waves) to a sample of atoms and then adjusting the frequency of the radiation and the strength of the ..... Click the link for more information. . electron spin resonance (ESR)or electron paramagnetic resonance (EPR)Technique of spectroscopic analysis (see spectroscopy) used to identify paramagnetic substances (see paramagnetism) and investigate the nature of the bonding within molecules by identifying unpaired electrons and their interaction with their immediate surroundings. Unpaired electrons, because of their spin, behave like tiny magnets and can be lined up in an applied magnetic field; energy applied by alternating microwave radiation is absorbed when its frequency coincides with that of precession of the electron magnets in the sample. The graph or spectrum of radiation absorbed as the field changes gives information valuable in chemistry, biology, and medicine. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
|
| ? Mentioned in | ? References in periodicals archive | |
|---|---|---|
Hydroxyl radical generation by electron paramagnetic resonance as a new method to monitor ambient particulate matter composition. Like electron paramagnetic resonance and nuclear magnetic resonance, FMR involves precession of the magnetization around an equilibrium direction, but motion of the magnetization is heavily influenced by the large magnetization that is characteristic of ferromagnets. To measure free radicals, Zweier irradiated the cells with microwaves while exposing them to a varying magnetic field, a technique called electron paramagnetic resonance. |
| Encyclopedia |
| Free Tools: |
For surfers:
Browser extension |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup | Partner with us |
|---|