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Omega–3 encapsulation by PGSS-drying and conventional drying methods. Particle characterization and oxidative stability Melgosa Gómez, Rodrigo Benito Román, Oscar Sanz Díez, Mª Teresa Paz Barragán, Esther de Beltrán Calvo, Sagrario Omega–3 Supercritical carbon dioxide Emulsion Oxidation Ingeniería química Alimentos Chemical engineering Food Particles from Gas-Saturated Solutions (PGSS)-drying has been used as a green alternative to encapsulate omega–3 polyunsaturated fatty acids (n–3 PUFAs) at mild, non-oxidative conditions. PGSS-dried particles have been compared to those obtained by conventional drying methods such as spray-drying and freeze-drying, finding encapsulation efficiencies (EE) up to 98% and spherical morphology for PGSS- and spray-dried particles. Freeze-dried powders showed irregular morphology and EE from 95.8 to 98.6%, depending on the freezing method. Differential scanning calorimetry (DSC) analysis revealed glass-transition and melting peaks of OSA-starch and a cold-crystallization peak corresponding to the encapsulated n–3 PUFA concentrate. Compared to conventionally dried powders, PGSS-dried microparticles showed lower primary and secondary oxidation after 28 days of storage at 4 °C. Ascorbic acid addition combined with the mild processing conditions of PGSS-drying yielded particles with a maximum peroxide value of 2.5 meq O2/kg oil after 28 days of storage at 4 °C. Junta de Castilla y León and the European Regional Development Fund for financial support of the project BU055U16 2018-09-07T07:52:54Z 2019-01 2020-01 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion 0308-8146 http://hdl.handle.net/10259/4919 10.1016/j.foodchem.2018.07.082 eng Food Chemistry. 2018, V. 270, p. 138-148 https://doi.org/10.1016/j.foodchem.2018.07.082 info:eu-repo/grantAgreement/JCyL/BU055U16 Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess application/pdf Elsevier https://riubu.ubu.es/bitstream/10259/4919/7/Melgosa-FC_2019.pdf.jpg Hispana TEXT http://creativecommons.org/licenses/by-nc-nd/4.0/ RIUBU. Repositorio Institucional de la Universidad de Burgos http://hdl.handle.net/10259/4919