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<p>Insoluble dietary fiber (IDF) derived from Korla fragrant pear pomace exhibits limited functional properties, restricting its application in the food industry.To address this, four modification methods—microwave treatment (MM), ultrafine grinding (UGM), high-pressure hydrothermal modification (HPHM), and cellulase hydrolysis (CHM)—were applied to modify the Korla fragrant pear insoluble dietary fiber (KFPWIDF). The effects of these distinct modification methods on the physicochemical, structural, and biological properties of KFPWIDF were systematically investigated. Compared with unmodified IDF, all modified samples exhibited reduced crystallinity and molecular weight, along with a looser and more porous microstructure, which synergistically contributed to improved functional properties and enhanced biological activities. Among the four methods, UGM modification yielded the most pronounced improvements. Notably, UGM-modified KFPWIDF (GMDF) exhibited the highest xylose content (a 73.27% increase), the highest SDF content (32.35%), the lowest IDF content (35.80%) and the strongest physicochemical properties, including water solubility (71.57%), water-holding capacity (3.45&#xa0;g/g), oil-holding capacity (1.82&#xa0;g/g), swelling capacity (3.61&#xa0;mL/g), cation exchange capacity (1.24&#xa0;mmol/g), and glucose adsorption capacity (5.47&#xa0;mmol/g). Additionally, GMDF showed optimal cholesterol adsorption capacity at both pH 2.0 (14.28&#xa0;mg/g) and pH 7.0 (17.19&#xa0;mg/g), as well as the highest DPPH· (57.33%) and ABTS⁺· (64.55%) radical scavenging activities. These findings demonstrate that modification, particularly UGM, effectively enhances the functional properties of KFPWIDF. This study provides a theoretical basis for the development of modified dietary fiber as a functional food ingredient and offers insights for future optimization of modification processes.</p>

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Effects of Different Modification Methods on Insoluble Dietary Fiber of Korla Fragrant Pear (Pyrus sinkiangensis Yü) Residue: Structure, Physicochemical, and Functional Properties

  • 期刊论文

  • 发表日期：

    2026年5月21日

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  • Shiqi Liu,
  • Yating Sun,
  • Lixiang Huai,
  • Yuting Xiao,
  • Jialin Xue,
  • Xianjin Zhou,
  • Qijuan Qin,
  • Ruiguo Cui,
  • Lijun Song

摘要

Insoluble dietary fiber (IDF) derived from Korla fragrant pear pomace exhibits limited functional properties, restricting its application in the food industry.To address this, four modification methods—microwave treatment (MM), ultrafine grinding (UGM), high-pressure hydrothermal modification (HPHM), and cellulase hydrolysis (CHM)—were applied to modify the Korla fragrant pear insoluble dietary fiber (KFPWIDF). The effects of these distinct modification methods on the physicochemical, structural, and biological properties of KFPWIDF were systematically investigated. Compared with unmodified IDF, all modified samples exhibited reduced crystallinity and molecular weight, along with a looser and more porous microstructure, which synergistically contributed to improved functional properties and enhanced biological activities. Among the four methods, UGM modification yielded the most pronounced improvements. Notably, UGM-modified KFPWIDF (GMDF) exhibited the highest xylose content (a 73.27% increase), the highest SDF content (32.35%), the lowest IDF content (35.80%) and the strongest physicochemical properties, including water solubility (71.57%), water-holding capacity (3.45 g/g), oil-holding capacity (1.82 g/g), swelling capacity (3.61 mL/g), cation exchange capacity (1.24 mmol/g), and glucose adsorption capacity (5.47 mmol/g). Additionally, GMDF showed optimal cholesterol adsorption capacity at both pH 2.0 (14.28 mg/g) and pH 7.0 (17.19 mg/g), as well as the highest DPPH· (57.33%) and ABTS⁺· (64.55%) radical scavenging activities. These findings demonstrate that modification, particularly UGM, effectively enhances the functional properties of KFPWIDF. This study provides a theoretical basis for the development of modified dietary fiber as a functional food ingredient and offers insights for future optimization of modification processes.