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- W76586002 abstract "Petroleum ether soluble part (fraction γ1) and petroleum ether insolu-ble, chloroform soluble part (fraction γ2 ) of pyridine extract of Nakayama lignite were analyzed by 13C-and 1H-NMR spectra.The average molecular structure parameters of the fractions γ1 and γ2 were calculated from the results of quantitative 13C-NMR spectra obtained by the gated decoupling with the relaxation reagent, 1H-NMR spectra, elementary analysis and average molecular weight.The average molecular structure of aromatic rings in the fraction γ1 consists of ben-zene ring and quinone ring, and that of the fraction γ2 consists of one benzene ring and aromatic rings such as naphthalene.The nonbridge aromatic ring carbons of 50-60 percent in the frac-tions γ1 and γ2 are substituted by alkyl groups." @default.
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- W76586002 date "1980-01-01" @default.
- W76586002 modified "2023-09-30" @default.
- W76586002 title "Structural Analysis of Pyridine Extract of Nakayama Lignite by 13C-and 1H-NMR Spectra" @default.
- W76586002 doi "https://doi.org/10.3775/jie.59.9_723" @default.
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