Quantitative ¹³C NMR study of structural variations within the vitrinite and inertinite maceral groups for a semifusinite-rich bituminous coal

Earth and Planetary Sciences

• Vitrinite 100%
• Fraction 80%
• Maceral 80%
• Variation 60%
• Carbon 40%
• Pulse 40%
• Excitation 40%
• Coal 20%
• Increasing 20%
• Trend 20%
• Medium 20%
• Purity 20%
• Gradient 20%
• Proportion 20%
• Reflectance 20%
• 13C NMR Studies 20%

Chemistry

• Vitrinite 100%
• Group 60%
• Density 60%
• Bituminous Coal 40%
• Number 20%
• Phase Composition 20%
• Purity 20%
• Aromatic Structure 20%
• Methyl Group 20%
• Coal 20%
• Centrifugation 20%
• 13C Solid-State Nuclear Magnetic Resonance Spectroscopy 20%

Medicine and Dentistry

• Coal 60%
• Carbon 40%
• Pulse Rate 40%
• Excitation 40%
• Carbon Nuclear Magnetic Resonance 40%
• Density Gradient Centrifugation 20%
• Cross Polarization 20%
• Methyl Group 20%