Influence of carbonic nanostructure formation on EPR line parameters during carbonization of wheat bran

Ryabikin, Yu. A.; Yemuranov, M. M.; Zashkvara, O. V.; Бийсенбаев, М А; Shabanova, T. A.; Mansurov, Z. A.

doi:10.1007/s00723-008-0157-x

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2010

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“…The authors deconvoluted EPR spectra into three components and they analysed concentration of paramagnetic centres connected with these component lines. In the work made by Ryabikin et al [7] an analysis of vegetable materials with carbon content in the range 40-85% after carbonization in the temperature range 100-800…”

Section: Introductionmentioning

confidence: 99%

Paramagnetic Centres in Oxidised Coal

et al. 2010

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This paper comprises the results obtained by continuous wave (cw)/pulse electron paramagnetic resonance spectroscopy for oxidised coals. The values of EPR linewidths are different for samples of coal treated by different chemical agents. The asymmetric EPR line shape indicates to complex composition of paramagnetic centres in coal. In coal oxidised by HNO 3 big changes of linewidth with temperature were observed. For all samples the spin-lattice relaxation time T 1 was determined by pulse EPR method. The correlation between used chemical agents and the value of T 1 was established.

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Section: Introductionmentioning

confidence: 99%