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Title: Thermal characterization of starch-water system by photopyroelectric technique and adiabatic scanning calorimetry
Authors: Cruz-Orea, A
Bentefour, El Hassane
Jamée, Peter
Chirtoc, Mihai
Glorieux, Christ
Pitsi, Guido
Thoen, Jan #
Issue Date: Jan-2003
Publisher: Amer inst physics
Series Title: Review of scientific instruments vol:74 issue:1 pages:818-821
Abstract: Starch is one of the most important carbohydrate sources in human nutrition. For the thermal analysis of starch, techniques such as differential scanning calorimetry have been extensively used. As an alternative, we have applied a photopyroelectric (PPE) configuration and adiabatic scanning calorimetry (ASC) to study the thermal properties of starch-water systems. For this study we used nixtamalized corn flour and potato starch with different quantities of distilled water, in order to obtain samples with different moisture content. By using PPE and ASC methods we have measured, for each technique separately, the heat capacity by unit volume (rhoc(p)) at room temperature for a corn flour sample at 90% moisture. The obtained values agree within experimental uncertainty. By using these techniques we also studied the thermal behavior of potato starch, at 80% moisture, in the temperature range where phase transitions occur. In this case the PPE signal phase could be used as a sensitive and versatile monitor for phase transitions. (C) 2003 American Institute of Physics.
ISSN: 0034-6748
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Soft Matter and Biophysics
Physics and Astronomy - miscellaneous
# (joint) last author

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