Abstract:
:The lignin-carbohydrate complex (LCC) was isolated from milled wood lignin of 2- and 24-month-old crude bamboo (Neosinocalamus affinis) culms using acetic acid (AcOH) and then characterized. The results have shown that the LCC preparation from 2-month-old bamboo (L₂) exhibited a slightly lower molecular weight than the LCC preparation from the 24-month-old bamboo (L24). Further studies using Fourier transform infrared spectroscopy (FT-IR) and heteronuclear single quantum coherence (2D-HSQC) NMR spectra analyses indicate that the LCC preparations included glucuronoarabinoxylan and G-S-H lignin-type with G>S>H. The content of the S lignin units of LCC in the mature bamboo was always higher than in the young bamboo. Combined with sugar composition analysis, the contents of phenyl glycoside and ether linkages in the L24 preparation were higher than in the L₂ preparation; however, there was a reverse relationship of ester LCC bonds in L₂ and L24. Lignin-xylan was the main type of LCC linkage in bamboo LCCs. Lignin-lignin linkages in the LCC preparations included β-β, β-5 and β-1 carbon-to-carbon, as well as β-O-4 ether linkages, but β-1 linkages were not present in L₂.
journal_name
Int J Mol Scijournal_title
International journal of molecular sciencesauthors
Yue PP,Hu YJ,Fu GQ,Sun CX,Li MF,Peng F,Sun RCdoi
10.3390/ijms19010001subject
Has Abstractpub_date
2017-12-21 00:00:00issue
1issn
1422-0067pii
ijms19010001journal_volume
19pub_type
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