Pasting properties of modified corn grit from extrusion process

Effect of extrusion conditions on pasting properties (Cold peak (I), Raw peak, Hold, Breakdown, Final viscosity, Set back, Peak time and Cold peak (II)) of modified corn grit from extrusion process were investigated using Rapid Visco Analyzer (Software: Thermocline for windows Version 2.1 with extrusion profile method). A co-rotating twin screw extruder was used for modified corn grit with three operating factor such as particle size (250, 500 and 600 μm), feed moisture content (14, 16 and 18%) and screw speed (300, 350 and 400 rpm). Increasing feed moisture content results in extrudates with a higher pasting viscosity, but otherwise increasing screw speed shows with a lower response. Particle size has a slightly effect for this experiment. All of extrusion conditions have no effect for peak time (P>0.05)