科研之友
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摘要
Dietary fiber is an important part of a healthy diet and offers many physiological benefits. In this work, the pomace of Rosa Roxburghii Tract fruit was used as raw material. The insoluble dietary fiber (IDF) from the pomace of R. Roxburghii Tract fruit was extracted by ultrasonic-assisted extraction technology. The effects of ultrasonic power, extraction time, extraction temperature and ratio of material to liquid on the yields of IDF were investigated by single factor experiments. The optimal extraction conditions were optimized by Box-Behnken design (BBD) and response surface methodology (RSM). The results showed that the optimal extraction conditions were as follow: ultrasonic power of 184 W, extraction time of 14.7 min, extraction temperature of 49.5 ℃, and material-to-liquid ratio of 1:16.25 g/mL. Under this optimal extraction, the maximum yield of IDF was 76.00% in accordance with the predicted value, indicating that the optimization of ultrasonic-assisted extraction of IDF from the pomace of R. Roxburghii Tract fruit had good accuracy and reliability. Results of basic component analysis indicated that crude IDF was mainly composed of cellulose (42.06%±0.82%), hemicellulose (13.26%±0.01%) and lignin (12.36%±0.78%). In addition, compared with the conventional hot water method, ultrasonic-assisted extraction could increase the content of IDF.
- 出版日期2020
- 单位华南理工大学
