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Chinese Journal of High Pressure Physics  > 2012  >  26(6): 639-644.
WAN Jie, LIU Cheng-Mei, LI Ti, LIU Wei, . Effect of Dynamic High Pressure Microfluidization on the Crystal Structure of Dietary Fiber[J]. Chinese Journal of High Pressure Physics, 2012, 26(6): 639-644. doi: 10.11858/gywlxb.2012.06.007
Citation: WAN Jie, LIU Cheng-Mei, LI Ti, LIU Wei, . Effect of Dynamic High Pressure Microfluidization on the Crystal Structure of Dietary Fiber[J]. Chinese Journal of High Pressure Physics, 2012, 26(6): 639-644. doi: 10.11858/gywlxb.2012.06.007
shu

Effect of Dynamic High Pressure Microfluidization on the Crystal Structure of Dietary Fiber

doi: 10.11858/gywlxb.2012.06.007
  • 1.

    State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China;

  • 2.

    Sino-German Food Engineering Center, Nanchang University, Nanchang 330047, China

  • Received Date: 25 Aug 2012
  • Rev Recd Date: 12 Nov 2012
  • Publish Date: 15 Dec 2012
    Abstract
  • Differences in specific surface area and crystal structure between raw dietary fiber (DF) obtained from soybean and DF modified with dynamic high pressure microfluidization (DHPM) were analysis by nitrogen adsorption, X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The results indicated that the specific surface area of DF was enlarged significantly (p0.05) by DHPM treatment. The specific surface area of DF increased with the increase of pressure in the range of 40-140 MPa, and the maximum specific surface area of DF was 2.887 5 m2/g. When the pressure went on increasing, the accessibility to N2 tended to decrease because of the aggregation of micro particles.XRD confirmed that both raw DF and modified DF had cellulose Ⅰ crystal structure. After DHPM treatment the crystal form of DF was not changed, whereas the apparent crystallinity of DF was reduced. The higher the pressure was, the less the apparent crystallinity was. FTIR spectra showed that DHPM led to 2-OHO-6 intramolecular hydrogen bond and glycosidic linkage decreased, and as the pressure increased the effect became more obvious.

     

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