Effect of γ-irradiation on structure, physicochemical property and bioactivity of soluble dietary fiber in navel orange peel

作者：Li XiaoNi, Biying Wang, Hu Wanjun, Haiguang Chen, Zhili Sheng, Bao Yang, Limei Yu · 发表于：Food Chemistry X · 年份：2022 · DOI：10.1016/j.fochx.2022.100274 · 被引用次数：35 · 研究领域：Food composition and properties、Nanocomposite Films for Food Packaging、Meat and Animal Product Quality

Soluble dietary fibers are widely used in functional food. In this work, the effects of γ-irradiation on molecular weight, structure, physicochemical properties and bioactivities of soluble dietary fiber in navel orange peel (OSDF) were investigated. Γ-irradiation enhanced the extraction yield of OSDF. The molar ratio of glucose and galacturonic acid was increased. The molecular weight profile of OSDF was modified. Γ-irradiation (3-6 kGy) improved the water holding capacity, water swelling capacity, oil holding capacity, cation-exchange capacity, nitrite adsorption capacity and total antioxidant capacity of OSDF. Glucose adsorption capacity and bifidobacterium proliferation capacity of OSDF were improved in a dose-dependent behaviour. Moreover, γ-irradiation promoted the cracking of microstructure. FT-IR spectra showed that more carboxyl groups were newly formed by γ-irradiation. These findings indicated that γ-irradiation treatment was an efficient technique for improving physicochemical properties and health benefits.