13C n.m r spectra have been obtained on ten solid coal samples of various types and on three coal-. . derived materials, using high-power proton decoupling, cross polarization and magic-angle spinning, and provide valuable information on the carbon distribution between aromatic and non-aromatic stru
13C Nuclear magnetic resonance characterization of coal macerals by magic-angle spinning
β Scribed by Gary E. Maciel; Mark J. Sullivan; Leon Petrakis; D.W. Grandy
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 405 KB
- Volume
- 61
- Category
- Article
- ISSN
- 0016-2361
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β¦ Synopsis
13C cross-polarization and magic-angle spinning (CP/MAS) nuclear magnetic resonance (n.m.r.) experiments are reported on two fusinites, three vitrinites, one micrinite, one sample of attrite, one exinite, one resinite and one lignite. With one exception, the maceral spectra show no more fine structure than the CP/MAS n.m.r. results for whole coals. The maceral spectra are discussed in relation to each other and to the corresponding spectra of whole coals.
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## The carbon aromaticities (fa) of vitrinite, exinite, micrinite and fusinite from a high-volatile A bituminous coal have been determined by 13C-' H cross-polarization nuclear magnetic resonance spectrometry. Values of f, for the four macerals were found to decrease in the order: fusinite > micr
## Abstract Highβresolution magic angle spinning (HRMAS) ^1^H NMR spectroscopy has been applied to the biochemical characterization of specific brain regions in rats in order to establish baseline levels of tissue metabolite profiles with which to compare models of neuropathology or toxic lesion. C