Lin Yanting, Zhang Siling, Huang Yifei, Yang Shuyuan, Zhou An, Zhang Wencheng, Wu Zeyu
Engineering Research Center of Bio-Process of Ministry of Education, School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China.
The Experimental Research Center, Anhui University of Chinese Medicine, Hefei 230038, China.
Foods. 2025 Jan 24;14(3):388. doi: 10.3390/foods14030388.
The main aim of this study was to enhance the content of soluble dietary fiber (SDF) derived from rice bran (RB) through various treatments, including physical methods (ultrasound and alternating magnetic field (AMF)) and enzymatic approaches (cellulase and xylanase), applied individually or in combination. The results revealed that AMF treatment was the most effective single modification technique for increasing SDF yield, followed by treatments with xylanase, cellulase, and ultrasound. Notably, among the combined approaches, the sequential ultrasound-xylanase treatment (U-X) demonstrated the highest potential for enhancing SDF yield. Further optimization experiments revealed that under the conditions of a xylanase addition of 4.3 mg/g sample, a material-to-liquid ratio of 50 mL/g, and an ultrasonic power of 72 W, the yield of U-X-SDF significantly increased from 1.03% to 18.4%. Compared to unmodified samples, the modified SDF groups exhibited marked enhancements in water holding capacity (42.5-86.4%) and water solubility (21.0-30.6%), while the unmodified SDF displayed superior oil holding capacity than the modified groups. In summary, the sequential ultrasound-xylanase treatment not only improves the SDF yield but also enhances the functional properties of RB-derived SDF, positioning it as a valuable health-promoting food additive with potential benefits for both laboratory and industrial food applications. The optimized treatment process can contribute to the development of new functional food ingredients from RB, thereby promoting health and wellness in consumers.
本研究的主要目的是通过各种处理方法提高米糠（RB）中可溶性膳食纤维（SDF）的含量，这些处理方法包括物理方法（超声和交变磁场（AMF））和酶法（纤维素酶和木聚糖酶），单独或组合使用。结果表明，AMF处理是提高SDF产量最有效的单一改性技术，其次是木聚糖酶、纤维素酶和超声处理。值得注意的是，在组合方法中，超声-木聚糖酶顺序处理（U-X）在提高SDF产量方面显示出最高潜力。进一步的优化实验表明，在木聚糖酶添加量为4.3 mg/g样品、料液比为50 mL/g和超声功率为72 W的条件下，U-X-SDF的产量从1.03%显著提高到18.4%。与未改性样品相比，改性SDF组的持水能力（42.5-86.4%）和水溶性（21.0-30.6%）显著提高，而未改性SDF的持油能力优于改性组。总之，超声-木聚糖酶顺序处理不仅提高了SDF产量，还增强了RB衍生SDF的功能特性，使其成为一种有价值的促进健康的食品添加剂，对实验室和工业食品应用都有潜在益处。优化后的处理工艺有助于从RB开发新的功能性食品成分，从而促进消费者的健康。
