ISSN:
1750-3841
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Response Surface Analysis (RSA) was used to study the effect of three variables, process temperature (120, 145 and 170°C), feed moisture content (20, 30 and 40%) and screw speed (800, 900 and 1000 rpm) on extrudate characteristics. Unheated soybean flakes extruded under different conditions were subjected to Warner-Bratzler shear (WBS), water absorption (WA) measurements and residual trypsin inhibitor activity (TIA) assays. Low feed moisture contents induced higher internal heat production causing residual TIA in the product to be lower than expected, WA to increase and WBS to be independent of process temperature (at constant screw speed of 900 rpm). Variation of screw speed permitted the attainment of desired values of product characteristics when moisture and temperature had to be fixed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2621.1976.tb00691.x
Permalink