Electron Spin Resonance Characteristics of Some Normal Tissues: Effect of Microwave Power

See allHide authors and affiliations

Science  02 Apr 1965:
Vol. 148, Issue 3666, pp. 94-95
DOI: 10.1126/science.148.3666.94-a


Electron spin resonance measurements of normal tissue at 77°K indicate the presence of two types of resonances which can be identified by varying the incident microwave power: (i) an intense, easily saturable, organic free-radical component and (ii) a weak but relatively nonsaturating component probably due to paramagnetic trace elements.