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Keywords:

  • corn;
  • extrudates;
  • cell-size;
  • puffed-corn;
  • image analysis;
  • extrusion

ABSTRACT

The cell size distributions of various experimental puffed corn extrudates were determined by image analysis, applied to longitudinal and transversal cross sections. Individual cell cross-sectional area was used as the size measure. All the cell size distributions, regardless of specimen orientation, composition and extrusion conditions, were described mathematically by both the log-normal and Rosin-Rammler distribution functions. The distributions mean size, degree of skew-ness or the corresponding distribution functions constants, were characteristic of the extrudate type and its particular cellular structure.