Fractionation of DMSO-Extracted and NaOH-Extracted Hemicelluloses by Gradient Ethanol Precipitation from Neosinocalamus affinis

被引：9

作者：

Fu, Genque ^{[1
]}

Yue, Panpan ^{[1
]}

Hu, Yajie ^{[1
]}

Li, Nan ^{[1
]}

Shi, Zhengjun ^{[2
]}

Peng, Feng ^{[1
]}

机构：

[1] Beijing Forestry Univ, Beijing Key Lab Lignocellulos Chem, Beijing 100083, Peoples R China

[2] Southwest Forestry Univ, Coll Mat Sci & Technol, Kunming 650224, Yunnan, Peoples R China

来源：

INTERNATIONAL JOURNAL OF POLYMER SCIENCE | 2018年 / 2018卷

基金：

中国国家自然科学基金;

关键词：

STRUCTURAL-CHARACTERIZATION; CELL-WALLS; SOLUBLE HEMICELLULOSES; WHEAT ENDOSPERM; BAMBOO; POLYSACCHARIDES; ARABINOXYLAN; XYLAN; PURIFICATION; HETEROXYLAN;

D O I：

10.1155/2018/9587042

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Neosinocalamus affinis hemicelluloses were extracted with pure DMSO and 3% NaOH in sequence. The DMSO- and NaOH-extracted hemicelluloses were then successively fractionated by gradient ethanol precipitation. NaOH-extracted hemicellulosic fractions with different branch degree could be separated by gradient ethanol precipitation, while DMSO-extracted hemiceilulosic fractions could not. spectra showed that DMSO-extracted fractions have more complete structure, while NaOH-extracted fractions have no acetyl at all. The FT-IR and NMR revealed that the DMSO-extracted Neosinocalamus affinis hemicelluloses were 4-0-methyl-glucuronoarabinoxylans consisting of a linear (1 -> 4)-beta-D-xylopyranosyl backbone with branches at O-2,3 of acetyl, O-2 of 4-O-methyl-a-D glucuronic acid, and O-3 of arabinose.

引用

页数：8

共 14 条

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