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Optimization of the production of acetylated distarch adipates using the novel software ‘MULTIPLEX’
Author(s) -
Mali S.,
Silva R. A. S.,
Grossmann M. V. E.,
Silva R. S. F.,
Borsato D.
Publication year - 2001
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1046/j.1365-2621.2001.00503.x
Subject(s) - retrogradation (starch) , absorption of water , acetic anhydride , materials science , moisture , extender , chemistry , chromatography , starch , composite material , food science , biochemistry , polyurethane , amylose , catalysis
Acetylated, cross‐linked and pregelatinized cassava starches were produced in a single‐screw extruder with different moisture contents (180, 220 and 260 g kg –1 ), reagent (adipic acetic mixed anhydride) concentrations (4, 11 and 18 g kg –1 ) and screw speeds (100, 130 and 160 r.p.m.). The acetylation, cross‐linking and pregelatinization increased cold viscosity (CV), water absorption index (WAI) and gel hardness, it also reduced gel cohesiveness, paste clarity and retrogradation of the modified‐starches compared with control samples (CSs). A novel microcomputer program called MULTIPLEX was developed for the optimization of the process. The optimization process maximized CV, WAI, gel hardness and paste clarity, and minimized gel cohesiveness and retrogradation of the modified‐starches. The optimum conditions were moisture of 240 g kg –1 , reagent concentration of 4 g kg –1 and screw speed of 100 r.p.m. Experimentally determined values for all responses found in products processed under the optimum conditions were very close to the predicted values and this confirmed the validity of predicted models.