We present the results of an electron paramagnetic resonance (EPR) study of mixed cholesterol gallstones. We have established that free radicals are distributed nonuniformly within the interior of the stone. The type and number of paramagnetic centers depend on the pigment content in the selected layer. We show that the parameters of the sextet lines in the EPR spectrum of the pigment are close to the parameters of lines in the spectrum of a brown pigment stone.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 81, No. 1, pp. 141–145, January–February, 2014.
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Kiselev, S.A., Tsyro, L.V., Afanasiev, D.A. et al. Application of Electron Paramagnetic Resonance to Study of Gallstones. J Appl Spectrosc 81, 140–144 (2014). https://doi.org/10.1007/s10812-014-9899-4
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DOI: https://doi.org/10.1007/s10812-014-9899-4