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Chemistry and Industry of Forest Products ›› 2017, Vol. 37 ›› Issue (6): 110-116.doi: 10.3969/j.issn.0253-2417.2017.06.015

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Compositions and Functional Properties of Soluble Dietary Fiber from Olive Pomace

DING Shasha1, HUANG Lixin1, ZHANG Caihong1,2, XIE Pujun1, DENG Yejun1, WANG Xiaojie1   

  1. 1. Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab. for Biomass Chemical Utilization;Key and Open Lab. of Forest Chemical Engineering, SFA;Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China;
    2. Research Institute of Forestry New Technology, CAF, Beijing 100091, China
  • Received:2017-05-20 Online:2017-12-25 Published:2018-01-05

Abstract: The crude soluble dietary fiber(SDF) from Olive pomace(Olea europaea L.) was obtained by using alkaline extraction method. The chemical composition, monosaccharide composition and functional groups were characterized by gas chromatography(GC) and infrared spectrometry. Furthermore, the effects of olive pomace SDF on the in vitro NO2- adsorption and antioxidant activity were investigated. The results showed that the content of SDF in the crude olive pomace SDF was 60.90%. The monosaccharide of crude SDF was composed of xylose, arabinose, rhamnose, glucose, galactose and mannose with the molar ratio of 64.0:9.4:3.9:3.9:2.6:1.6. The major component was xylose, followed by arabinose. Infrared spectra showed that the crude SDF had the characteristics absorption peaks of polysaccharide. The maximal adsorption capacity of SDF for NO2- in simulated gastric environment at pH=2(98.92%) was greater than that in the intestine environment at pH=7(8.69%). The maximum scavenging ratio of the crude SDF for hydroxyl radical(·OH) was 46.34% at the mass concentration of 6 g/L and weaker than that of Vc. The crude SDF had strong DPPH radical scavenging activity with the IC50 of 0.06 g/L. The DPPH radical scavenging activity of the crude SDF was weaker than that of Vc at low concentrations and close to that of Vc at high concentrations.

Key words: olive pomace, soluble dietary fiber, monosaccharide composition, functional properties

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