Print Email Facebook Twitter Identification of the thermal transitions in potato starch at a low water content as studied by preparative DSC Title Identification of the thermal transitions in potato starch at a low water content as studied by preparative DSC Author Steeneken, P.A.M. Woortman, A.J.J. TNO Kwaliteit van Leven Publication year 2009 Abstract The aim of this work was to identify the transitions in the complex DSC profiles of potato starch at a low water content. Preparative DSC involves the thermal processing of samples in stainless steel DSC pans in a way that allows their subsequent structural characterization. The low temperature (LT), dual melting (M1-M2), and high temperature (HT) endotherms observed in DSC profiles of potato starch with 16% water were assigned to enthalpy relaxation, melting with preservation of granular identity, and transition of the melted granules into a molecular melt, respectively. Granular melting was accompanied by a strong reduction of swelling capacity. Significant molecular degradation was observed after the HT transition. There is evidence that HT does not represent a true thermodynamic transition, but is due to a volume change in the sample. In contrast to potato starch, maize starch with 16% water gave inhomogeneous samples after processing, presumably because of its low packing density. © 2009 Elsevier Ltd. All rights reserved. Subject NutritionFood technologyDSCGelatinizationMeltingStarchDSCEnthalpy relaxationsGelatinizationHigh temperaturesLow temperaturesLow water contentsMaize starchesMolecular degradationsPacking densitiesPotato starchesStructural characterizationsSwelling capacitiesThermal processingThermal transitionsVolume changesDifferential scanning calorimetryGelationMeltingStainless steelWater contentStarchSolanum tuberosumZea mays To reference this document use: http://resolver.tudelft.nl/uuid:b4d1becc-5448-4a8e-a50a-f7af6c29c9eb DOI https://doi.org/10.1016/j.carbpol.2008.12.026 TNO identifier 241595 ISSN 0144-8617 Source Carbohydrate Polymers, 77 (2), 288-292 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.