Electron spin resonance and its applications
The method of electron spin resonance spectroscopy for studying free radicals and related materials is outlined and the basic parts of the theory are given. Some typical spectrometers are indicated and details are given of the arrangement of samples of different kinds. Three systems are discussed in some detail, as examples, namely the spectrum of a free radical in irradiated alanine, the semiquinone spectrum in solution and the haemoglobin crystal structure problem. Reference is made to applications in biology and related fields; subjects of special importance include radiobiology, photosynthesis, enzymic oxidation and nucleic acid complexes.
Using the Stevens–Tiersten equation for slowly varying thickness modes in doubly rotated quartz plate piezoelectric resonators, we determine optimal electrode shape and size for these resonators. The electrodes obtained are optimal in that they satisfy Bechmann’s number in every direction.