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The Effect of Extrusion Conditions on Water-extractable Arabinoxylans from Corn Fiber

  • Jeon, Su-Jung (Department of Food Science and Technology, Kongju National University) ;
  • Singkhornart, Sasathorn (Department of Food Science and Technology, Kongju National University) ;
  • Ryu, Gi-Hyung (Department of Food Science and Technology, Kongju National University)
  • Received : 2014.05.08
  • Accepted : 2014.06.10
  • Published : 2014.06.30

Abstract

The effect of feed moisture contents (30%, 40%, and 50%) and screw speed (200 rpm, 250 rpm, and 300 rpm) on the corn fiber gum (CFG) yield and soluble arabinoxylans (SAX) content of destarched corn fiber was investigated. The CFG yields and SAX contents of extruded, destarched corn fiber were higher than that of destarched corn fiber. In extruded, destarched corn fiber, increased screw speed and decreased feed moisture contents resulted in a higher SAX contents. The maximum yields of CFG obtained from extruded, destarched corn fiber were $79.1{\pm}19.0g/kg$ (30% feed moisture content) and $82.3{\pm}11.30g/kg$ (300 rpm screw speed). The highest SAX content was also observed at a screw speed of 300 rpm. The results of the present study show that water extraction and extrusion combined have the potential to increase CFG and SAX yields from corn fiber.

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

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