PDF(Pubmed)
Abstract：
Corn straw is one kind of agricultural by-product containing 70-80% insoluble dietary fiber (IDF). In order to develop corn straw dietary fiber, this study was conducted to increase soluble dietary fiber (SDF) yield and improve the structure, functional and prebiotic properties of IDF and SDF from corn straw treated by alkali oxidation treatment, enzymatic hydrolysis, microbial fermentation and the combination of these methods. The results demonstrated that the yield of SDF was significantly increased from 2.64% to 17.15% after corn straw was treated by alkali oxidation treatment + Aspergillus niger fermentation + cellulase hydrolysis, compared with untreated corn straw. The SDF extracted from corn straw treated by alkali oxidation treatment + Aspergillus niger fermentation + cellulase hydrolysis (F-SDF) exhibited a honeycomb structure, low crystallinity (11.97%), good antioxidant capacity and high capacities of water holding, water solubility and cholesterol absorption and promoted short-chain fatty acids production by chicken cecal microbial fermentation in vitro. F-SDF enhanced the antibacterial activity against Escherichia coli and Staphylococcus aureus proliferations of Lactobacillus plantarum when it was used as a substrate for Lactobacillus plantarum fermentation. It could be concluded that the combined treatments could increase SDF yield from corn straw and improve its functional and prebiotic properties.
摘要：
玉米秸秆是一种含有70-80%不溶性膳食纤维(IDF)的农副产品。为了开发玉米秸秆膳食纤维,本研究旨在提高可溶性膳食纤维(SDF)的产量和改善结构,碱氧化处理玉米秸秆IDF和SDF的功能和益生元特性，酶水解，微生物发酵和这些方法的组合。结果表明，玉米秸秆经碱氧化处理+黑曲霉发酵+纤维素酶水解处理后，SDF的产量从2.64%显著提高到17.15%。与未经处理的玉米秸秆相比。从碱氧化处理+黑曲霉发酵+纤维素酶水解(F-SDF)处理的玉米秸秆中提取的SDF呈蜂窝状结构,低结晶度（11.97%），良好的抗氧化能力和高的持水能力，水溶性和胆固醇的吸收，促进了鸡盲肠微生物体外发酵生产短链脂肪酸。当F-SDF用作植物乳杆菌发酵的底物时，F-SDF增强了对大肠杆菌和金黄色葡萄球菌的抗菌活性。可以得出结论，联合处理可以提高玉米秸秆的SDF产量并改善其功能和益生元特性。
