|
KMID : 1134819970260030436
|
|
Journal of the Korean Society of Food Science and Nutrition
1997 Volume.26 No. 3 p.436 ~ p.442
|
|
|
Effect of CO₂ Gas Injection on Properties of Extruded Corn Starch
|
|
Ryu Gi-Hyung
Kang Sun-Hee
Lee Eun-Young
Lim Seung-Taik
|
|
|
Abstract
|
|
|
|
Corn starch was extruded under relatively low shear, high moisture, and low temperature. Puffing of corn starch dough was induced by injecting CO₂ gas in the range from 0㎫ to 0.09㎫. Piece density and compressive modulus for puffed corn starch were decreased by increasing the injection pressure to 0.07㎫, and increased above 0.07㎫. The microstructure of corn starch puffed with CO₂ gas showed thick cell wall and small cell size, compared with those puffed with steam. RVA paste viscosity curves of corn starch puffed with CO₂ had different patterns from those puffed with steam, probably resulted from partial gelatinization of starch. Water absorption and solubility were not significantly changed by CO₂ injection pressure, but the average degree of polymerization was reduced by higher CO₂ injection. The water absorption, water solubility, and the average degree of polymerization for corn starch puffed with CO₂ were significantly lower than those puffed with steam.
|
|
|
KEYWORD
|
|
|
$CO_2$ gas injection, extrusion, corn starch
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|