Affiliation:
1. Department of Food and Cooking Science , Sunchon National University , 255 Jungangro Sunchon , Jellanam-do 540-742 , Republic of Korea
2. Department of Food Science and Technology and BK 21 Plus Program , Graduate School of Chonnam National University , Gwangju 61186 , Republic of Korea
Abstract
Abstract
The physicochemical properties of puffed rice snack base (PRSB) prepared via extrusion cooking under various feed moisture contents and screw speeds were investigated. The moisture content, screw speed, and soy flour type significantly (p < 0.05) affected the physicochemical properties of PRSB viz; size, density, porosity, color, breaking strength, crystallinity, water absorption index (WAI) and water solubility index (WSI). While, a slight effect on pasting properties was observed between PRSB added with defatted and full-fat soy flour, respectively. Soy flour lipids significantly (p < 0.05) influenced extrusion cooking conditions especially at high screw speed and feed moisture content. The result revealed that extrusion cooking with addition of full-fatty soy flour can be exploited as a viable method to produce PRS with a high expansion ratio and low breaking strength at recommended extrusion conditions of feed moisture content of 19 % and screw speed of 300 rpm.
Subject
Engineering (miscellaneous),Food Science,Biotechnology
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