Wang Yuanyuan, Cao Xuefei, Zhang Ruochen, Xiao Lin, Yuan Tongqi, Shi Quentin, Sun Runcang
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University Beijing 100083 China
Shandong Longlive Bio-Technology Co., Ltd. Shandong 251200 China.
RSC Adv. 2018 Oct 15;8(61):35211-35217. doi: 10.1039/c8ra07140c. eCollection 2018 Oct 10.
Xylooligosaccharides (XOS) are useful food and pharmaceutical additives, which can be produced from various xylans. However, the XOS prepared from lignocellulosic materials are difficult to purify due to the complexity of the degradation products. Thus, hemicelluloses with a high-purity will be the preferred feedstock for XOS production. In this work, acid hydrolysis and enzymatic hydrolysis were applied to prepare XOS from the residual hemicelluloses of the dissolving pulp. The results showed that the highest XOS yield (45.18%) obtained from the acid hydrolysis was achieved with 1% sulfuric acid at 120 °C for 60 min, and xylohexaose accounted for 47% of the XOS. For enzymatic hydrolysis, under optimal conditions, the highest XOS yield of 42.96% was observed, and xylobiose and xylotriose comprised 90.5% of the XOS. It is suggested that the distribution of the XOS could be controlled significantly according to the enzymatic or acid hydrolysis conditions used.
低聚木糖（XOS）是有用的食品和药物添加剂，可由各种木聚糖生产。然而，由木质纤维素材料制备的XOS由于降解产物的复杂性而难以纯化。因此，高纯度的半纤维素将是生产XOS的首选原料。在这项工作中，采用酸水解和酶水解从溶解浆的残余半纤维素中制备XOS。结果表明，酸水解在120℃下用1%硫酸处理60分钟时，XOS产率最高（45.18%），木六糖占XOS的47%。对于酶水解，在最佳条件下，观察到XOS的最高产率为42.96%，木二糖和木三糖占XOS的90.5%。建议根据所用的酶水解或酸水解条件，可以显著控制XOS的分布。
