Abstract
A comparison is made between the electron spin resonance (ESR) spectra obtained from bovine bone samples after (i) mechanical degradation, (ii) γ-irradiation, and (iii) mechanical degradation followed by γ-irradiation. Mechanical degradation is achieved by filing in either liquid nitrogen or air at room temperature. γ-irradiation is performed at 77 K. The stability of the radical species produced at 77 K is studied as a function of temperature. It is concluded that the spectra obtained in all instances arise from radicals formed both in the collagen and mineral phase of the bone, those from the collagen predominating. The relative radical concentrations from the collagen and mineral phase vary with the degradation method employed. It is observed that additional hydrogen atom radicals are produced only in the case of the γ-irradiated samples.
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On leave of absence from C.N.R. Centre for Macromolecular Physics, University of Bologna, Italy.
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Scandola, M., Reed, P.E. ESR study of degraded bovine bone. J Mater Sci 14, 541–548 (1979). https://doi.org/10.1007/BF00772712
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DOI: https://doi.org/10.1007/BF00772712