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- W1973492094 abstract "Softwood (Cryptomeria japonica) and hardwood (Fagus crenata) were treated in supercritical water (380°C, 100 MPa) for 8 s. The treated woods were fractionated to the water-soluble portion, methanol-soluble portion, and methanol-insoluble residues. For the methanol-soluble portion, which mainly consisted of lignin-derived products, gel permeation chromatography (GPC) and gas chromatographic-mass spectrometric (GC-MS) analyses were conducted to clarify the molecular weight distribution and to identify the monomeric products, respectively. GPC analysis revealed that the methanol-soluble portion contains monomeric and some oligomeric products. GC-MS analysis identified 19 guaiacyl compounds in the methanol-soluble portion from softwood, and 15 syringyl monomeric compounds in the methanol-soluble portion from hardwood. The structures of identified products included not only phenyl propane (C6—C3) units but also C6—C2 and C6—C1 units. In addition, the infrared spectra suggested that the methanol-soluble portion maintains the typical structure of lignin, although it is rich in condensed-type linkages with some changes in the propyl side chain. These results indicate that the supercritical water treatment cleaves not only ether linkages but also part of the propyl chains in lignin to give various aromatic compounds." @default.
- W1973492094 created "2016-06-24" @default.
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- W1973492094 date "2005-06-25" @default.
- W1973492094 modified "2023-10-17" @default.
- W1973492094 title "GC-MS and IR spectroscopic analyses of the lignin-derived products from softwood and hardwood treated in supercritical water" @default.
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- W1973492094 doi "https://doi.org/10.1007/s10086-004-0653-z" @default.
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