【摘要】 为了了解纤维素材料应用于实用性膳食纤维保健品中的作用,以淀粉和木醋杆菌活化菌种为原料,采取动静结合的发酵方式,制备出了淀粉/细菌纤维素复合材料(SBC)。采用离体实验模拟人体胃和肠道的pH环境,探讨了SBC在此环境之下的酸解效率,以及对于甘油和三聚氰胺的吸附能力和最大吸附量,为食用膳食纤维保健品的研发提供了依据。实验结果显示,SBC在酸性条件(模拟胃液,含量为0.15%的盐酸溶液)下的酸解效率为20.47%。甘油浓度为4%(V/V),三聚氰胺含量为4%(w/w)时,SBC的吸附效率最高。在此基础之上,SBC对甘油的最大吸附量为0.84 g(甘油)/1 g(SBC),对三聚氰胺的吸附量为9.92 mg(三聚氰胺)/1 g(SBC),且吸附量大约是纯细菌纤维素的2倍。更多还原

【Abstract】 In order to understand the role of cellulosic materials in practical dietary fiber health products,starch/bacterial cellulose composites(SBC) were prepared by using starch and Acetobacter xylinum as the raw materials and adopting dynamic and static fermentation methods. In vitro experiments were carried out to simulate the pH environment of human stomach and intestine. The acid hydrolysis efficiency of SBC under this environment, as well as the adsorption capacity and maximum adsorption capacity for glycerol and melamine, were used as dietary fiber. Provide research and development basis for health products. The experimental results show that the acid hydrolysis efficiency of the SBC under acidic conditions(simulated gastric juice, 0.15% hydrochloric acid solution) is 20.47%. When the glycerin concentration is 4%(V/V) and the melamine content is 4%(w/w), the SBC has the highest adsorption efficiency. On this basis, the maximum adsorption capacity of SBC for glycerol is 0.84 g(glycerol)/1 g(SBC), and the adsorption amount of melamine is 9.92 mg(melamine)/1 g(SBC), and the adsorption amount is about twice that of pure bacterial cellulose.更多还原