Abstract
Rosaroxburghiiresidue as raw material, we studied the extraction process of dietary fiber fromrosa roxburghiipomace by chemical method. The effects of temperature, time, pH, solid-liquid ratio on the IDF yield under the effect of alkali and acid were explored by single factor experiments and orthogonal experiment. The results showed that the optimal condition of extracting IDF was as follows: the 60 meshrosaroxburghii pomace were 80 min in water bath at 60°C under the condition of the solid-liquid ratio 1:15 and the pH 12; and thenrosa roxburghiipomace were 100 min in water bath at 50°C on the condition of the solid-liquid ratio 1:15, and pH 3.0 after rinsing, the average IDF yield which reached (86.3±1.0)%. This experiment provides experimental basis for the selection of dietary fiber raw materials, and also provides theoretical basis for increasing the added value ofrosa roxburghii.
Highlights
With the rapid development of science and technology, the living standard has been improved significantly, which has resulted in the increasing incidence of human "civilization disease"
In view of the rich dietary fiber in RS dregs, and the low cost of chemical extraction of dietary fiber, which is suitable for industrial production and other characteristics [10], in this study, the processing waste RS pomace were used as raw materials, and the purpose of extracting insoluble dietary fiber (IDF) was achieved by adjusting alkali and acid to remove protein, other sugar, pectin and other impurities in the dregs; the experimental results were dietary fiber
The time of alkali treatment is short, which may be due to the fact that alkali can not completely treat these protein, resulting in low yield; it is significantly higher than other groups at 100 min (p
Summary
With the rapid development of science and technology, the living standard has been improved significantly, which has resulted in the increasing incidence of human "civilization disease". Various byproducts of food processing can be developed and utilized in a large number, among which insoluble dietary fiber (IDF) is not digested and absorbed by human endogenous enzymes, including cellulose, hemicellulose, lignin and chitosan [4,5]. In view of the rich dietary fiber in RS dregs, and the low cost of chemical extraction of dietary fiber, which is suitable for industrial production and other characteristics [10], in this study, the processing waste RS pomace were used as raw materials, and the purpose of extracting IDF was achieved by adjusting alkali and acid to remove protein, other sugar, pectin and other impurities in the dregs; the experimental results were dietary fiber. The selection of materials provides experimental basis, and provides theoretical basis for increasing the added value of RS
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