Extraction of Soluble Dietary Fibers from Pitaya Peel
Received date: 2016-05-23
Accepted date: 2017-01-10
Online published: 2017-07-10
Pitaya peel can be a good source for preparing dietary fibers, and such dietary fibers has excellent physicochemical properties. To stimulate the comprehensive utilization of pitaya, we optimized the extraction of soluble dietary fibers (SDF) from pitaya peel. The cellulase digestion method was used with single-factor experiments and the response surface method. The optimized extraction conditions were cellulase concentration of 0.54%, enzymolysis temperature at 50°C and solvent pH of 5.2. Under the optimal conditions, the extraction rate of SDF from pitaya peel was up to 19.81%, the water holding capacity was 31.25 g∙g-1 and the swelling capacity was 29.11 mL∙g-1.
Key words： Pitaya peel; soluble dietary fibers; cellulase; response surface method
Guichun Zhang, Yujing Liu, Yanmin Li, Ping Mu, Mingjuan Qu, Qing Li, Juhua Zhou . Extraction of Soluble Dietary Fibers from Pitaya Peel[J]. Chinese Bulletin of Botany, 2017 , 52(5) : 622 -630 . DOI: 10.11983/CBB16116
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