香蕉不溶性膳食纤维的理化特性与通便功能研究

Research on the physicochemical characteristics and laxative effects of insoluble dietary fiber from bananas

研究香蕉不可溶膳食纤维(IDF)的理化性质,通过动物实验评价其通便功能。结果表明,香蕉IDF的持水力、膨胀力和容积密度分别为11.91 g/g,9.66 m L/g和0.345 g/m L,电镜观察IDF为长条片状纤维,结晶度为66.14%。香蕉IDF的单糖组分包括鼠李糖、半乳糖、木糖、阿拉伯糖和葡萄糖。小鼠通便实验结果表明,香蕉IDF具有通便功能,在4 g/(kg·BW·d)的喂饲剂量下,具有促进便秘模型小鼠小肠蠕动的作用;在1 g/(kg·BW·d)的剂量下,显示出缩短首便时间、加快排便速度的效果。香蕉IDF对小鼠粪便含水量有显著影响,并且呈现量效关系。研究得出,香蕉不可溶性膳食纤维具有润肠通便作用。

The properties and laxative effects of banana insoluble dietary fiber （IDF） were investigated in this study. Results showed that the water holding capacity, swelling capacity, and volume density of IDF were 11.91 g/g,9.66 mL/g, and 0.345 g/mL respectively.The crystallinity of banana IDF was 66.14%. Banana IDF was bar fiber under scanning electron microscopy. IDF from bananas was constituted by rhamnose, galactose,xylose, arabinose, and glucose.It was discovered by animal experiments that banana IDF had laxative effects.Banana IDF at dose 4 g/（ kg· BW· d）was able to accelerate the movement of the small intestine and was effective in shortening the time to the first black dejeeta and quickening catharisis at the dose of 1 g/（ kg·BW· d）. Banana IDF significantly impacted the dejecta moisture content of mice, and the moisture content was positive correlated to IDF -dose.In conclusion,banana IDF had laxative effects.