Chemical composition, structure, physicochemical and functional properties of dietary fiber obtained from fenneland its straw

被引：0

作者：

Ma M. ^{[1
]}

Mu T. ^{[1
]}

Yan Z. ^{[2
]}

Zhang M. ^{[1
]}

Sun H. ^{[1
]}

Chen J. ^{[1
]}

机构：

[1] Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing

[2] Research Institute of Dunhuang Seed, Jiuquan, 736200, Gansu

来源：

Journal of Chinese Institute of Food Science and Technology | 2016年 / 16卷 / 05期

关键词：

Composition; Dietary fiber; Physicochemical and functional properties; Sfennel; Straw; Structure;

D O I：

10.16429/j.1009-7848.2016.05.029

中图分类号：

学科分类号：

摘要：

Objective: To investigate the chemical composition, structure, physicochemical and functional properties of dietary fiber obtained from fennel and its straw. Method: The AOAC methods, ion chromatography, X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier Transform Infrared Spectroscopy(FTIR) were used to determine the chemical composition and structure of fennel dietary fiber and fennel straw dietary fiber which were obtained by shear emulsifying assisted enzymatic hydrolysis, the water retention capacity, water swelling capacity, oil holding capacity, glucose adsorbtion capacity, α-amylase inhibitory activity and bile acid retardation index were also tested to evaluate the physicochemical and functional properties of the two dietary fibers. Results: The purity of dietary fiber of fennel and its straw were 84.76% and 78.73%, respectively. Cellulose, hemicelluloses, pectin, lignin and five neutral sugars, viz. rhamnose, arabinose, galactose, glucose and xylose were also existed in the above two dietary fibers. Fennel dietary fiber exhibited porous network structure while fennel straw dietary fiber had a plate structure. In addition, cellulose crystal area and characteristic group were observed in both two dietary fibers. Furthermore, the fennel straw dietary fiber exhibited higher water retention capacity, water swelling capacity and oil holding capacity (6.91 g/g, 6.77 mL/g, and 6.99 g/g) than fennel dietary fiber (5.91 g/g, 5.70 mL/g, and 6.47 g/g), while fennel dietary fiber had a higherglucose adsorbtion capacity, α-amylase inhibitory activity and bile acid retardation index (18.23%, 3.05-34.58 mmol/g, and 32.94-34.65%) than fennel straw dietary fiber (13.49%, 1.39-15.63 mmol/g, and 13.12-23.44%). Conclusion: Dietary fiber of fennel and its strawhave stable structure, better physicochemical and functional properties, indicating that they have great potentialfor utilization in food industry as new types ofdietary fibers. © 2016, Chinese Institute of Food Science and Technology. All right reserved.

引用

页码：205 / 216

页数：11

共 48 条

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