Fractional purification and bioconversion of hemicelluloses

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• 作者：Feng Peng^a ; ^b ; Pai Peng^b ; Feng Xu^a ; ^{xfx315@bjfu.edu.cn} ; Run-Cang Sun^a ; ^b ; ^{rcsun3@bjfu.edu.cn}
• 关键词：Hemicelluloses ; Isolation ; Fractional purification ; Enzymatic hydrolysis ; Fermentation
• 刊名：Biotechnology Advances
• 出版年：2012
• 期刊代码：22_07349750
• 类别：abs
• 出版时间：July-August, 2012
• 卷：30
• 期：4
• 页码：879-903
• 文件大小：1412 K

摘要

Hemicelluloses are types of plant cell wall polysaccharides, and the world's second most abundant renewable polymers after cellulose in lignocellulosic materials. They represent a type of hetero-polysaccharide with complex structure containing glucose, xylose, mannose, galactose, arabinose, rhamnose, glucuronic acid, and galacturonic acid in various amounts, depending on the source. Hemicelluloses are usually bonded to other cell-wall components such as cellulose, cell-wall proteins, lignin, and phenolic compounds by covalent and hydrogen bonds, and by ionic and hydrophobic interactions. This paper provides a review on hemicelluloses from lignocellulosic materials, especially in regard to their isolation and purification methods, and bioconversion. Current isolation and purification strategies are summarized, including: alkali peroxide extraction, organic solvent extraction, steam explosion, ultrasound-assisted extraction, microwave-assisted extraction, column chromatography, and membrane separation. In addition, the bioconversion of hemicelluloses including pretreatment, enzymatic hydrolysis, and fermentation are discussed.