Study on the monosaccharide compositions,physico- properties and preparation technology of soluble dietary fiber by enzymatic method from Pyracantha Fortuneana

The enzymatic method was adopted to extract soluble dietary fiber from Pyracantha Fortuneana. The experimental factors including the amount of cellulose,extract time and liquid- to- solid ratio on the extraction ratio of soluble dietary fiber( SDF) was adopted.Meanwhile,the monosaccharide compositions and physico- properties of the dietary fiber from Pyracantha Fortuneana was researched. The results showed that,the optimal extraction conditions of the soluble dietary fiber prepared by enzymatic method were as follows: the amount of cellulose was0.83%; extract time was 2 h and the liquid- to- solid ratio was 23 m L / g,the predicted value and measured value of the soluble dietary fiber were 5.97% and 5.91%,respectively.The main monosaccharide compositions of the dietary fiber from Pyracantha Fortuneana were xylose,arabinose,rhamnose and sorbose,also contained a small amount of fructose and mannose,among them with xylose content was the highest,reached to 33.56%. The results of the physico- properties experiments showed that,the dietary fiber from Pyracantha Fortuneana possessed good WHC and OHC,and had strong glucose- adsorption capacity.