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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Effect of instantaneous controlled pressure drop (DIC) on physicochemical properties of wheat, waxy and standard maize starches
Journal of Cereal Science, Volume 49, No. 3, Year 2009
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Description
Standard maize starch (SMS), waxy maize starch (WMS) and wheat starch (WTS) were hydrothermally treated by the Instantaneous Controlled Pressure Drop (DIC) process. This process consists in a short pressurisation obtained by the injection of saturated steam at fixed pressure during a predetermined time followed by a sudden pressure drop towards vacuum. The effects of DIC conditions on thermal characteristics, enzyme susceptibility, pasting (Brabender) and rheological properties of treated starches were investigated. For treated starches, an increase of transition temperatures (To and Tp), a narrowing of the width of gelatinization endotherms and a decrease of the gelatinization enthalpies (ΔH) were observed as the severity of processing conditions increased. WMS, SMS and WTS showed a significant increase in enzymatic hydrolysis after treatment. The saccharification yield showed an increase from 19% (native) to 44%, 21% (native) to 59% and 55% (native) to 79% for SMS, WMS and WTS, respectively. The study suggests that the structural modifications due to the previous DIC treatment influence the in-vitro hydrolysis and the access to the ultrastructure of starch granules; the susceptibility to hydrolysis increases from SMS to WMS and WTS. For all treated starches, the decrease in peak viscosity and in apparent viscosity was related to the processing conditions. Crown Copyright © 2008.
Authors & Co-Authors
Maache-Rezzoug, Zoulikha
France, La Rochelle
La Rochelle Université
Maugard, Thierry
France, La Rochelle
Littoral Environnement et Sociétés Lienss
Zarguili, Ikbal
France, La Rochelle
La Rochelle Université
Bezzine, E.
France, La Rochelle
Littoral Environnement et Sociétés Lienss
El Marzouki, M. N.
Tunisia, Tunis
University of Carthage, Institut National Des Sciences Appliquées et de Technologie
Loisel, C.
France, Saint-nazaire
Gepea - Genie Des Procédés Environnement - Agroalimentaire
Statistics
Citations: 30
Authors: 6
Affiliations: 4
Identifiers
Doi:
10.1016/j.jcs.2008.10.005
e-ISSN:
10959963
Research Areas
Health System And Policy