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Effect of High-Intensity Ultrasound on the Crystallization Behavior of High-Stearic High-Oleic Sunflower Oil Soft Stearin

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Journal of the American Oil Chemists' Society

Abstract

The objective of this research was to evaluate the effect of high-intensity ultrasound (HIU) and crystallization temperature (T c) on the crystallization behavior, melting profile, and elasticity of a soft stearin fraction of high-stearic high-oleic sunflower oil. Results showed that HIU can be used to induce and increase the rate of crystallization of the soft stearin with significantly higher SFC values obtained in the sonicated samples, especially at higher T c. SFC values were fitted using the Avrami model, and higher k n and lower n values were obtained when samples were crystallized with sonication, suggesting that sonicated samples crystallized faster and through an instantaneous nucleation mechanism. In addition, the crystal morphology, melting behavior, and viscoelasticity were significantly affected by sonication.

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Acknowledgments

This work was supported by CONICET through Project PIP 11220110101025, by the National Agency for the Promotion of Science and Technology (ANPCyT) through Project PICT 0060, by the University of Buenos Aires through Project 20020100100467, and by the Utah Agricultural Experiment Station, Utah State University, and approved as journal paper number 8688.

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Correspondence to Silvana Martini.

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Rincón-Cardona, J.A., Agudelo-Laverde, L.M., Herrera, M.L. et al. Effect of High-Intensity Ultrasound on the Crystallization Behavior of High-Stearic High-Oleic Sunflower Oil Soft Stearin. J Am Oil Chem Soc 92, 473–482 (2015). https://doi.org/10.1007/s11746-015-2620-9

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  • DOI: https://doi.org/10.1007/s11746-015-2620-9

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