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Updated: Jun 23, 2026

Use of Electron Paramagnetic Resonance in Biological Samples at Ambient Temperature and 77 K
06:45

Use of Electron Paramagnetic Resonance in Biological Samples at Ambient Temperature and 77 K

Published on: January 11, 2019

[The use of EPR spectroscopy to control the changes in organism radioresistance. Clinical results]

M K Pulatova, V L Sharygin, T G Shliakova

    Biofizika
    |May 1, 2009
    PubMed

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    Ideally, an unpaired electron shows a single peak in the EPR spectrum due to the transition between the two spin energy states. However, coupling interactions can occur between the spins of the unpaired electron and any neighboring spin-active nuclei. This hyperfine coupling results in hyperfine splitting, where the EPR signal is split into multiplets. The signals split into 2nI + 1 peaks, where n is the number of equivalent nuclei and I is the nuclear spin. These splitting patterns provide...