Investigation of vitrification and phase transitions in dough semi-finished products with plant additives
DOI:
https://doi.org/10.15587/1729-4061.2015.37919Keywords:
dough semi-finished products, freezing, phase transitions, vitrification, NMR, DSC, cold storageAbstract
The aim of the paper was to investigate the processes of phase transitions and vitrification of water in dough semi-finished product with the plant additive during the freezing and heating, as well as to study the physical state of water at temperatures below 0 °C.
Fresh and pre-frozen dough half-finished products were used as the subject of the research. The study of phase transitions and vitrification was performed on a differential scanning calorimeter, designed and manufactured in the IPC&C of the NAS of Ukraine.
As a result of the studies, it was determined that the effect of additives on the water state and nature of phase transitions in the water component in the dough at a temperature below 0 °C is caused by the additional content of sugars, proteins and starch, introduced with additives.
The state of water in the dough semi-finished products was investigated by nuclear magnetic resonance, during which the spin-spin relaxation time of the samples was determined.
It was also found that the pre-freezing increases the water mobility in the samples and introducing additives that contain extra solids by the type of colloids - reduce the water mobility, which in turn provides a better integrity of dough semi-finished products during cold storage.
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Copyright (c) 2015 Андрій Миколайович Одарченко, Алина Александровна Сергиенко
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