Assertion: crude lignin | /r/HasProperty | separated by at
Facets:
Source sentences:
text: The crude lignin separated by AT was mainly composed of S lignin that had β-1, β-5, β-O-4, and β-β bonds.
text: Thermogravimetric analysis (TGA) showed that the maximum thermal decomposition temperatures and the final carbon residues of crude lignin separated by RVET and AT were 520 °C, 5.26%, and 470 °C, 27.92%, respectively.
text: The crude lignin separated by AT was mainly composed of S lignin that had β-1, β-5, β-O-4, and β-β bonds.
text: Thermogravimetric analysis (TGA) showed that the maximum thermal decomposition temperatures and the final carbon residues of crude lignin separated by RVET and AT were 520 °C, 5.26%, and 470 °C, 27.92%, respectively.
text: The separated acid and evaporative precipitate, as crude lignin separated by AT and RVET from PHL, respectively, were compared and characterized by Fourier transform infrared spectroscopy (FTIR), 1H-NMR spectroscopy, thermogravimetric analysis (TGA), and pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS).
text: This contributed to the subsequent study of the crude lignin separated by AT.
text: Calculated Composition Contents in the Acid and Evaporative Precipitate, as Crude Lignin Separated by AT and RVET from PHL, respectively
text: The FTIR spectra of acid and evaporative precipitate, as crude lignin separated by AT and RVET from PHL, respectively, are presented in Fig. 1, and the assignments are listed in Table 3 in accordance with previous papers (Buta et al. 1989; Jahan and Mun 2007; Zheng et al. 2012; Yang and Jahan 2013; Zhao et al. 2014; Constant et al. 2015; Li 2016).
text: FTIR spectra of the acid and evaporative precipitate, as crude lignin separated by AT and RVET from PHL, respectively
text: Assignment of FTIR Spectra of Acid and Evaporative Precipitate, as Crude Lignin Separated by AT and RVET from PHL, respectively
text: The lower intensity of the band at 1515 cm-1 in acid precipitate, and the higher calculated acid-soluble lignin content (Table 1) than that of evaporative precipitate further indicated that the highest syringyl unit content was in crude lignin separated by AT.
text: The highest syringyl unit content in crude lignin separated by AT and RVET indicated quite possibly that the lignin in the PHL was mainly composed of S lignin.
text: 1H-NMR spectra of the acid and evaporative precipitate, as crude lignin separated by AT and RVET from PHL, respectively
text: As shown in the acid precipitate spectra, the crude lignin separated by AT was mainly composed of S lignin, due to the fact that only the syringyl unit (6.77 ppm to 6.79 ppm) was apparent.
text: The crude lignins separated by RVET and AT, being justified as HSG and S lignin, respectively, were also supported by the aforementioned FTIR spectra.
text: Compared with evaporative precipitate, acid precipitate had a higher final carbon residue (27.92%), lower maximum degradation temperature (470 °C), and narrower maximum peak of the DTGA curve, which indicated the crude lignin separated by AT was more likely to have higher lignin content, smaller molecular weight, and homogeneous lignin.
text: TGA/ DTGA curves of acid and evaporative precipitate, as crude lignin separated by AT and RVET from PHL, respectively
text: Identified Pyrolysis Products of Acid and Evaporative Precipitate, as Crude Lignin Separated by AT and RVET from PHL Respectively, at Various Temperatures
text: Thermogravimetric analysis (TGA) results showed that the maximum thermal decomposition temperatures and the final carbon residues of crude lignin separated by RVET and AT were 520 °C, 5.26%, and 470 °C, 27.92%, respectively.