A Unique Hyperfine ESR Spectrum in Mouse Neoplasms Analyzed By Computer Simulation.

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Abstract
Summary A unique triplet signal has been found in two mouse neoplasms during ESR studies of various mouse tissues. A virus-induced reticulum cell sarcoma of the spleen and the JAX C 1300 neuroblastoma both manifest this hypernne spectrum. This spectrum has been assigned to a nitrogen containing free radical with the unpaired electron vicinal to a heavy atom. Specifications for this triplet signal are gI = 2.012, gII = 2.095, and AI = 17.3 gauss, AII = 15 gauss. Analysis of the ESR signal was facilitated by the use of a computer simulation of the experimental spectrum.