期刊
FOOD RESEARCH INTERNATIONAL
卷 134, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.foodres.2020.109231
关键词
Cooling rate; Elasticity; Microstructure; Oil binding capacity; Oleogels; Solid fat content; Sonication; Textural properties
资金
- Utah Agricultural Experiment Station, Utah State University
- CONICET [PIP 1122015-0100156 CO]
- ANPCyT [PICT 2016-0520, PICT 2017-1522]
- UNS [PGI 24/M132]
- Fulbright Commission of Argentina
The effects of high-intensity ultrasound application (HIU-20 kHz, 96 W, 3 pulses: 10 s on/5s off) and cooling rate (0.1 and 10 degrees C/min) on physical properties of monoglycerides (MG) oleogels (3, 4.5, and 6 wt%) were evaluated. Oleogels melting profile, rheological and textural properties, crystal microstructure, crystal length (L-c), polymorphic behavior, oil binding capacity (OBC), and solid fat content (SFC) were determined after 24 h of storage at 5 or 25 degrees C. HIU caused significant changes in the MG crystallization behavior, producing a decrease in L-c and a stronger and more elastic network with higher OBC. HIU increased the adhesiveness of all samples whereas did not affect their cohesiveness. The effects of HIU application were enhanced by cooling at 0.1 degrees C/min and storing at 5 degrees C. Neither SFC nor thermal behavior were affected by HIU and the desired beta' polymorphism was obtained in all oleogels. This study shows that physical properties of MG oleogels can be significantly improved by HIU application to obtain suitable fats with low level of saturated fatty acids for food applications.
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