In this work peruvian carrot flour (Arracacia xanthorrhiza Bancr.) was processed in a single screw extruder at different moisture contents (11-19%), extrusion temperature (86-154ºC) and screw speed (136-272rpm). The parameters L*, a* and b* of color were analyzed in extruded flours. The viscosity related parameters determined include initial viscosity, viscosity peak, breakdown, setback and final viscosity. The results showed effect of feed moisture on flour color (L* and a*) and the extrusion temperature influenced b*. Moisture content of the feed had effect on initial and final viscosity, viscosity peak and breakdown. Extrusion temperature and screw speed had effect on final viscosity and setback.
Starch; viscosity; temperature; Arracacia xanthorrhiza
