Expansion and Functional Properties of Corn Starch Extrudates Related to their Molecular Degradation, Product Temperature and Water Content

Abstract

Research Paper__ w than at lower ones. Cold water solubility (CWS) of extrudates was dependent both on M __ w and PT. This dependency was similar to that of the CPV. The sediment volume depended on M __ w , PT and water content of the material on extrusion of the starch.

Extrusion of mixtures of starch and d-limonene encapsulated with β-cyclodextrin: Flavour retention and physical properties

“…5). This was consistent with literature data, where an increase in extrusion temperature, to some extent, is accompanied by a decrease in sectional expansion of the extrudates (Brumer, Meuser, van Lengerich, & Niemann, 2002;Della Valle, Vergnes, & Colonna, 1997;Kokini, Chang, & Lai, 1992;Ryu & Ng, 2001). The decrease in sectional expansion with increasing extrusion temperature can be explained by the theory of bubble growth and the role of glass transition temperature, which is related to the rheological properties of the starch melt (Campanella, Li, Ross, & Okos, 2002;Della Valle et al, 1997;Fan, Mitchell, & Blanshard, 1994;Kokini et al, 1992;Vergnes, Della Valle, & Colonna, 2003).…”

Description of Extrudate Characteristics in Relation to the Shear Stress of Plasticised Starches Determined In-line

“…This allows the conclusion that the solubility of starch extrudates also depends on factors other than the size of the polymer molecules, like the PT reached in the experiments [15]. These results correspond to those obtained for the CPV and the sediment volume.…”

“…Since we still found differences in the functional properties of extrudates made of various starches at the same MET it is obvious that the mean molecular weight of the polymers alone is not sufficient to characterise the relationship between the molecular structure and the functional properties of extruded starches of various botanical origin with a sufficient degree of accuracy. As shown in our previous publication [15] the PT also plays an important role in such a characterisation.…”

“…cold paste viscosity (CPV), cold water solubility (CWS) and sediment volume, were determined using published methods [4,15].…”

Application of an In-line Viscometer to Determine the Shear Stress of Plasticised Wheat Starch

“…The powders were tested to determine their cold paste viscosity (CPV) and cold water solubility (CWS) using the methods described by Bruemmer et al [34].…”