Fractional purification and bioconversion of hemicelluloses
Fractional purification and bioconversion of hemicelluloses
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DOI：
10.1016/j.biotechadv.2012.01.018
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发表时间：
2012-07-01
影响因子：
16
通讯作者：
Sun, Run-Cang
中科院分区：
文献类型：
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作者：
Peng, Feng;Peng, Pai;Sun, Run-Cang
半纤维素是植物细胞壁多糖的类型，并且是木质纤维素材料中仅次于纤维素的世界上第二丰富的可再生聚合物。它们代表一种具有复杂结构的杂多糖，根据来源，含有各种量的葡萄糖、木糖、甘露糖、半乳糖、阿拉伯糖、鼠李糖、葡萄糖醛酸和半乳糖醛酸。半纤维素通常通过共价键和氢键以及通过离子和疏水相互作用与其他细胞壁组分如纤维素、细胞壁蛋白质、木质素和酚类化合物键合。本文综述了木质纤维素半纤维素的分离纯化方法及其生物转化的研究进展。综述了目前分离纯化的方法，包括碱法、有机溶剂法、蒸汽爆破法、超声波辅助提取法、微波辅助提取法、柱层析法和膜分离法。此外，还对半纤维素的生物转化方法，包括预处理、酶解、发酵等进行了讨论。(C)2012 Elsevier Inc. All rights reserved.
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. (C) 2012 Elsevier Inc. All rights reserved.