Journal
CARBOHYDRATE POLYMERS
Volume 193, Issue -, Pages 212-220Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2018.03.065
Keywords
Inulin-type fructan; Optimization; Codonopsis pilosula; Prebiotic activity
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Funding
- International Cooperation Projects of Science & Technology Department of Sichuan Province [2017HH0093]
- China Postdoctoral Science Foundation [2016M602704]
- Natural Science Foundation of China [81760679]
- The Foundation of returnees in Sichuan province
- National Natural Science Foundation of China [31400006]
- Natural Science Foundation of Guangdong Province of China [2015A030310123]
- Shenzhen Overseas High-Level Personnel Innovation Special Fund [KQCX2015033ll7354154]
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The inulin-type fructan was obtained by DEAE anion exchange chromatography from C. pilosula Nannf. var. modesta (Nannf.) L. T. Shen, after optimized extract condition, which was established by response surface methodology, designed using Box-Behnken factorial design and the optimum condition were: extracting 2.5 h with ratio of solvent to material 40 mL/g at 100 degrees C, twice. The maximum extraction yield was 20.6 +/- 0.2%. It was confirmed as beta-(2-1) linkage fructan, with terminal glucose, and with a degree of polymerization of 2-17 (DPav = 6), shown by the results of methanolysis, methylation, nuclear magnetic resonance and molecular weight determination. The prebiotic activity was proven on account of stimulation effect on Lactobacillus and pH reduction of medium in vitro. The results indicated that the inulin from C. pilosula could be used as a potential natural source of prebiotics.
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