Molybdenum Content of Corn Plants Exhibiting Varying Degrees of Potassium Deficiency

Abstract
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.