A Kinetic Study of DDGS Hemicellulose Acid Hydrolysis and NMR Characterization of DDGS Hydrolysate

被引：6

作者：

Chen, Hanchi ^{[1
]}

Liu, Shijie ^{[1
]}

机构：

[1] SUNY Coll Environm Sci & Forestry, Dept Paper & Bioproc Engn, Syracuse, NY 13210 USA

来源：

APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY | 2015年 / 177卷 / 01期

关键词：

DDGS; NMR; HSQC characterization; Acid hydrolysis; Hydrolysis kinetics; STRUCTURAL-CHARACTERIZATION; DISTILLERS GRAINS; CONVERSION; CORN; PRETREATMENT; COOKING;

D O I：

10.1007/s12010-015-1735-7

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Liquid hot water (LHW) extraction was used as a pretreatment method to separate the hemicellulose fraction from dried distiller's grain with solubles (DDGS) into liquid phase. Acid hydrolysis using 3.264 % w/w sulfuric acid at 130 A degrees C was performed to convert polysaccharides in LHW extract to monosaccharides. The structure characterization of DDGS in anomeric carbon region based on proton NMR and heteronuclear single quantum coherence (HSQC) during acid hydrolysis was studied in this work. It reveals that the sugar units in DDGS hemicelluloses are constructed with (1-4)-beta-d-xylopyranose and alpha-l-arabinofuranosyl residues. A kinetic model is included to explain the changing concentration of monomer, oligomer, and sugar units. The model was further tested based on the changing concentration of five carbon sugar units during hydrolysis.

引用

页码：162 / 174

页数：13

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