Institute of Food Science and Technology/Western Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing 100193, China.
Institute of Food Science and Technology/Western Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing 100193, China.
Int J Biol Macromol. 2024 Mar;262(Pt 1):129743. doi: 10.1016/j.ijbiomac.2024.129743. Epub 2024 Jan 25.
High-pressure microfluidization treatment (HPMT) was performed on the insoluble dietary fiber (IDF) of highland barley bran (HBB), with conditions set at 60 MPa (IDF-60), 120 MPa (IDF-120), and two consecutive high-pressure treatments at 120 MPa (IDF-120-2), respectively. Then the particle size, structural, physicochemical and adsorption properties of different IDF samples were analyzed. After HPMT, the particle size of IDF samples gradiently decreased (p < 0.05), and part of IDF was transferred into soluble dietary fiber (SDF), accompanied by the decrease of hemicellulose and lignin content. In addition, the morphology of the IDF samples became more fragmented and wrinkled, and the two consecutive treatments at 120 MPa significantly damaged the crystalline structure of the IDF. Moreover, the adsorption capacities to water, oil, cholesterol, and NO were basically enhanced with the increase of treatment pressure and treatment number. The IDF-120-2 sample had the strongest water/oil-holding, swelling, and cholesterol trapping capacities, and the IDF-120 showed strongest NO trapping capacity (pH = 2). Through the correlation analysis, the adsorption capacities were positively to the particle size and SDF content, and negatively correlated with the specific surface area (SSA) and IDF content. The adsorption capacities of IDF for the four substances were positively correlated with each other.
采用高压微射流处理（HPMT）对青稞皮不溶性膳食纤维（IDF）进行处理，处理压力分别设定为 60 MPa（IDF-60）、120 MPa（IDF-120）和两次连续 120 MPa（IDF-120-2）处理，分析不同 IDF 样品的粒径、结构、理化及吸附性能。HPMT 后，IDF 样品的粒径逐渐减小（p＜0.05），部分 IDF 转化为可溶性膳食纤维（SDF），同时半纤维素和木质素含量降低。此外，IDF 样品的形貌变得更加碎片化和皱缩，两次连续 120 MPa 处理显著破坏了 IDF 的结晶结构。而且，随着处理压力和处理次数的增加，对水、油、胆固醇和 NO 的吸附能力基本增强。IDF-120-2 样品具有最强的持水/持油、膨胀和胆固醇捕获能力，IDF-120 对 NO 具有最强的捕获能力（pH=2）。通过相关性分析，吸附能力与粒径和 SDF 含量呈正相关，与比表面积（SSA）和 IDF 含量呈负相关。IDF 对四种物质的吸附能力呈正相关。
