Effects of extrusion with CO injection on physical and antioxidant properties of cornmeal-based extrudates with carrot powder.

Carrot powder and cornmeal were extruded at ratios of 0:100, 10:90, and 20:80 with and without CO injection at die temperatures of 80, 100, and 120 °C. The effects of the composition of the extrudate, die temperature, and CO injection on physicochemical and antioxidant properties of extruded products were studied. The results showed that die temperature had a significant effect on expansion ratio (ER), specific length, piece density, color, water absorption index (WAI), and water solubility index (WSI) ( < 0.

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

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.

Influence of germination and extrusion with CO(2) injection on physicochemical properties of wheat extrudates.

Whole wheat and germinated wheat flour were extruded in a laboratory co-rotating twin screw extruder with die temperatures (90 and 130°C), screw speeds (150 and 200rpm) and CO2 injection. The effects of germination and extrusion process on specific mechanical energy (SME) input, expansion ratio, specific length, piece density, elastic modulus, breaking strength, colour, water solubility index (WSI), water absorption index (WAI) and microstructure were determined. The study showed that the use of germinated wheat flour increased the specific length, lightness and the WSI.

Influence of twin-screw extrusion on soluble arabinoxylans and corn fiber gum from corn fiber.

Background: The effect of feed moisture content and screw speed in the extrusion process with and without chemical pretreatment of corn fiber was investigated. Different chemical pretreatment methods (NaOH and H2 SO4 solution) were compared. The improvement of reducing sugar, soluble arabinoxylans (SAX) content and the yield of corn fiber gum was measured.