In order to analyze the optimal alkali extraction process and physicochemical properties of the soluble dietary fiber (SDF) and insoluble dietary fiber (IDF) from Auricularia cornea var. Li. roots. The extraction process of A. cornea var. Li roots was designed and optimized by orthogonal experiment, and its physicochemical properties were determined. The results showed that with solid-liquid ratio of 1∶200, NaOH mass fraction of 1.5%, extraction time of 160 min and temperature of 80℃, the yield of SDF could reach 22.21%. The optimum extraction process of IDF was the same as SDF, except for temperature (60℃), with the yield of 37.52%. The water holding capacity, oil holding capacity and expansibility of SDF were 7.84 g/g, 3.2 g/g and 9.1 mL/g, while those of IDF were 26.46 g/g, 4.86 g/g and 17.9 mL/g, respectively. Besides, cholesterol adsorption capacity of SDF and IDF were 14.5 mg/g and 10.71 mg/g in acidic environment, and 15.5 mg/kg and 11.49 mg/kg in neutral environment. Sodium cholate adsorption capacity were 10.72% and 19.72%, while nitrite ion adsorption capacity of SDF and IDF were 23.41 mg/kg and 20.45 mg/kg in acidic environment, and 21.73 mg/kg and 19.82 mg/kg in neutral environment. In conclusion, the dietary fiber of from A. cornea var. Li. root is suitable as an additive used in health food with its good dietary fiber characteristics.
SI Fengling
,
LIU Xiaoyu
,
DENG Junlin
. Optimization of extraction process and physicochemical properties of dietary fiber from Auricularia cornea var. Li Root[J]. Food and Fermentation Industries, 2019
, 45(20)
: 209
-214
.
DOI: 10.13995/j.cnki.11-1802/ts.021236
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