Abstract
STUDIES of the nature and role of free radicals in normal and pathological processes have been shown to be very important1. Experiments with wet, frozen and lyophilized samples have shown that there is a correlation between changes in intensity of the electron spin resonance (ESR) signal and the metabolic behaviour of biological substrates2. Clearly such ESR signals are of a biological nature.
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EMANUEL, N., SAPRIN, A., SHABALKIN, V. et al. Detection and Investigation of a New Type of ESR Signal characteristic of Some Tumour Tissues. Nature 222, 165–167 (1969). https://doi.org/10.1038/222165a0
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DOI: https://doi.org/10.1038/222165a0
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